{"title":"STM 40-109","description":"\u003cp\u003eElectrically conductive, fuel-resistant faying surface sealant designed to conduct static electricity and provide EMI\/RFI shielding in aircraft integral fuel tanks and pressurized cabins.\u003c\/p\u003e","products":[{"product_id":"flamemaster-cs-3209-b1-2-stm40-109-electrically-conductive-fuel-resistant-sealant-6oz","title":"Flamemaster CS-3209 B1\/2  - STM40-109 - Electrically Conductive Fuel Resistant Sealant - 6oz.","description":"\u003ch3\u003eFlamemaster CS-3209 B  - STM40-109 - Electrically Conductive Fuel Resistant Sealant\u003c\/h3\u003e\n\u003cp\u003eCS 3209 Class B is a two-part, manganese dioxide cured polysulfide sealant uniquely engineered to be electrically conductive while providing excellent fuel resistance for aerospace applications. This innovative sealant incorporates conductive fillers, typically silver-coated particles, to create a low-resistance path, allowing for effective grounding or protection against static electricity and lightning strikes. The \"Class B\" designation indicates its trowelable consistency, making it suitable for application by spatula or extrusion gun for sealing seams, fasteners, and small access panels. Upon curing at room temperature, CS 3209 Class B forms a tough, flexible, and resilient rubber that maintains its integrity and conductivity even when exposed to aviation fuels, lubricants, and varying temperatures, ensuring both structural integrity and electrical continuity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features for Aviation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Part System: Composed of a base compound and an accelerator, mixed immediately prior to application.\u003cbr\u003ePolysulfide Chemistry: Provides outstanding resistance to a wide range of aviation fuels, hydraulic fluids, and lubricants.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrically Conductive: Contains conductive fillers (e.g., silver-coated glass beads or other conductive particles) to ensure electrical continuity across sealed joints, critical for grounding and EMI\/RFI shielding.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManganese Dioxide Cure: A robust curing agent that contributes to the sealant's durable properties.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass B Consistency: Trowelable, making it easy to apply with a spatula, spreader, or extrusion gun for filleting and sealing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuperior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A\/B), hydraulic fluids (e.g., Skydrol), and engine oils.\u003cbr\u003eWide Service Temperature Range: Maintains flexibility, sealing properties, and conductivity across the typical operating temperatures of aircraft.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGood Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific \"B\" class variant (e.g., B-1\/2, B-2, B-4).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Aviation Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing Integral Fuel Tanks with Grounding Requirements: Used in fuel tanks where components (e.g., fuel probes, sensors) need to be electrically grounded to the airframe, or where lightning strike protection needs to be maintained across joints.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFastener Sealing with Conductivity: Applied around conductive fasteners (rivets, bolts) in fuel tank areas to ensure electrical continuity across the joint and prevent fuel leaks.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStatic Dissipation: Used to dissipate static electricity buildup in areas exposed to fuel, reducing the risk of ignition.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEMI\/RFI Shielding: Can contribute to maintaining electromagnetic interference (EMI) and radio frequency interference (RFI) shielding continuity across panel joints in fuel-wetted or electrically sensitive zones.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRepair of Electrically Conductive Seals: Used for repairing existing electrically conductive fuel tank seals that have degraded.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuel System Component Bonding: Applied where certain fuel system components need to be both sealed and electrically bonded to the surrounding structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS-3209-Class-B-TDS-English.pdf?v=1750098197\" style=\"background-color: #000; border: none; border-radius: 4px; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; width: 80%;\" target=\"_blank\"\u003eDownload Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Flamemaster","offers":[{"title":"Default Title","offer_id":52333505282420,"sku":"CS3209B1-2KIT","price":67.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS3209B1-2KIT.png?v=1750255101"},{"product_id":"flamemaster-cs-3209-b1-2-stm40-109-electrically-conductive-fuel-resistant-sealant-pint","title":"Flamemaster CS-3209 B1\/2  - STM40-109 - Electrically Conductive Fuel Resistant Sealant - Pint","description":"\u003ch3\u003eFlamemaster CS-3209 B - STM40-109 - Electrically Conductive Fuel Resistant Sealant\u003c\/h3\u003e\n\u003cp\u003eCS 3209 Class B is a two-part, manganese dioxide cured polysulfide sealant uniquely engineered to be electrically conductive while providing excellent fuel resistance for aerospace applications. This innovative sealant incorporates conductive fillers, typically silver-coated particles, to create a low-resistance path, allowing for effective grounding or protection against static electricity and lightning strikes. The \"Class B\" designation indicates its trowelable consistency, making it suitable for application by spatula or extrusion gun for sealing seams, fasteners, and small access panels. Upon curing at room temperature, CS 3209 Class B forms a tough, flexible, and resilient rubber that maintains its integrity and conductivity even when exposed to aviation fuels, lubricants, and varying temperatures, ensuring both structural integrity and electrical continuity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features for Aviation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Part System: Composed of a base compound and an accelerator, mixed immediately prior to application.\u003cbr\u003ePolysulfide Chemistry: Provides outstanding resistance to a wide range of aviation fuels, hydraulic fluids, and lubricants.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrically Conductive: Contains conductive fillers (e.g., silver-coated glass beads or other conductive particles) to ensure electrical continuity across sealed joints, critical for grounding and EMI\/RFI shielding.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManganese Dioxide Cure: A robust curing agent that contributes to the sealant's durable properties.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass B Consistency: Trowelable, making it easy to apply with a spatula, spreader, or extrusion gun for filleting and sealing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuperior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A\/B), hydraulic fluids (e.g., Skydrol), and engine oils.\u003cbr\u003eWide Service Temperature Range: Maintains flexibility, sealing properties, and conductivity across the typical operating temperatures of aircraft.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGood Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific \"B\" class variant (e.g., B-1\/2, B-2, B-4).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Aviation Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing Integral Fuel Tanks with Grounding Requirements: Used in fuel tanks where components (e.g., fuel probes, sensors) need to be electrically grounded to the airframe, or where lightning strike protection needs to be maintained across joints.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFastener Sealing with Conductivity: Applied around conductive fasteners (rivets, bolts) in fuel tank areas to ensure electrical continuity across the joint and prevent fuel leaks.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStatic Dissipation: Used to dissipate static electricity buildup in areas exposed to fuel, reducing the risk of ignition.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEMI\/RFI Shielding: Can contribute to maintaining electromagnetic interference (EMI) and radio frequency interference (RFI) shielding continuity across panel joints in fuel-wetted or electrically sensitive zones.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRepair of Electrically Conductive Seals: Used for repairing existing electrically conductive fuel tank seals that have degraded.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuel System Component Bonding: Applied where certain fuel system components need to be both sealed and electrically bonded to the surrounding structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS-3209-Class-B-TDS-English.pdf?v=1750098197\" style=\"background-color: #000; border: none; border-radius: 4px; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; width: 80%;\" target=\"_blank\"\u003eDownload Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Flamemaster","offers":[{"title":"Default Title","offer_id":52333593133428,"sku":"CS3209B1-2PT","price":163.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS3209B1-2PT.png?v=1750255124"},{"product_id":"flamemaster-cs-3209-b1-2-stm40-109-electrically-conductive-fuel-resistant-sealant-quart-copy","title":"Flamemaster CS-3209 B1\/2  - STM40-109 - Electrically Conductive Fuel Resistant Sealant - Quart","description":"\u003ch3\u003eFlamemaster CS-3209 B - STM40-109 - Electrically Conductive Fuel Resistant Sealant\u003c\/h3\u003e\n\u003cp\u003eCS 3209 Class B is a two-part, manganese dioxide cured polysulfide sealant uniquely engineered to be electrically conductive while providing excellent fuel resistance for aerospace applications. This innovative sealant incorporates conductive fillers, typically silver-coated particles, to create a low-resistance path, allowing for effective grounding or protection against static electricity and lightning strikes. The \"Class B\" designation indicates its trowelable consistency, making it suitable for application by spatula or extrusion gun for sealing seams, fasteners, and small access panels. Upon curing at room temperature, CS 3209 Class B forms a tough, flexible, and resilient rubber that maintains its integrity and conductivity even when exposed to aviation fuels, lubricants, and varying temperatures, ensuring both structural integrity and electrical continuity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features for Aviation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Part System: Composed of a base compound and an accelerator, mixed immediately prior to application.\u003cbr\u003ePolysulfide Chemistry: Provides outstanding resistance to a wide range of aviation fuels, hydraulic fluids, and lubricants.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrically Conductive: Contains conductive fillers (e.g., silver-coated glass beads or other conductive particles) to ensure electrical continuity across sealed joints, critical for grounding and EMI\/RFI shielding.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManganese Dioxide Cure: A robust curing agent that contributes to the sealant's durable properties.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass B Consistency: Trowelable, making it easy to apply with a spatula, spreader, or extrusion gun for filleting and sealing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuperior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A\/B), hydraulic fluids (e.g., Skydrol), and engine oils.\u003cbr\u003eWide Service Temperature Range: Maintains flexibility, sealing properties, and conductivity across the typical operating temperatures of aircraft.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGood Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific \"B\" class variant (e.g., B-1\/2, B-2, B-4).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Aviation Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing Integral Fuel Tanks with Grounding Requirements: Used in fuel tanks where components (e.g., fuel probes, sensors) need to be electrically grounded to the airframe, or where lightning strike protection needs to be maintained across joints.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFastener Sealing with Conductivity: Applied around conductive fasteners (rivets, bolts) in fuel tank areas to ensure electrical continuity across the joint and prevent fuel leaks.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStatic Dissipation: Used to dissipate static electricity buildup in areas exposed to fuel, reducing the risk of ignition.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEMI\/RFI Shielding: Can contribute to maintaining electromagnetic interference (EMI) and radio frequency interference (RFI) shielding continuity across panel joints in fuel-wetted or electrically sensitive zones.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRepair of Electrically Conductive Seals: Used for repairing existing electrically conductive fuel tank seals that have degraded.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuel System Component Bonding: Applied where certain fuel system components need to be both sealed and electrically bonded to the surrounding structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS-3209-Class-B-TDS-English.pdf?v=1750098197\" style=\"background-color: #000; border: none; border-radius: 4px; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; width: 80%;\" target=\"_blank\"\u003eDownload Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Flamemaster","offers":[{"title":"Default Title","offer_id":52333597557108,"sku":"CS3209B1-2QT","price":300.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS3209B1-2QT.png?v=1750255156"},{"product_id":"flamemaster-cs-3209-b2-stm40-109-electrically-conductive-fuel-resistant-sealant-quart","title":"Flamemaster CS-3209 B2 - STM40-109 - Electrically Conductive Fuel Resistant Sealant - Quart","description":"\u003ch3\u003eFlamemaster CS-3209 B - STM40-109 - Electrically Conductive Fuel Resistant Sealant\u003c\/h3\u003e\n\u003cp\u003eCS 3209 Class B is a two-part, manganese dioxide cured polysulfide sealant uniquely engineered to be electrically conductive while providing excellent fuel resistance for aerospace applications. This innovative sealant incorporates conductive fillers, typically silver-coated particles, to create a low-resistance path, allowing for effective grounding or protection against static electricity and lightning strikes. The \"Class B\" designation indicates its trowelable consistency, making it suitable for application by spatula or extrusion gun for sealing seams, fasteners, and small access panels. Upon curing at room temperature, CS 3209 Class B forms a tough, flexible, and resilient rubber that maintains its integrity and conductivity even when exposed to aviation fuels, lubricants, and varying temperatures, ensuring both structural integrity and electrical continuity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features for Aviation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Part System: Composed of a base compound and an accelerator, mixed immediately prior to application.\u003cbr\u003ePolysulfide Chemistry: Provides outstanding resistance to a wide range of aviation fuels, hydraulic fluids, and lubricants.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrically Conductive: Contains conductive fillers (e.g., silver-coated glass beads or other conductive particles) to ensure electrical continuity across sealed joints, critical for grounding and EMI\/RFI shielding.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManganese Dioxide Cure: A robust curing agent that contributes to the sealant's durable properties.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass B Consistency: Trowelable, making it easy to apply with a spatula, spreader, or extrusion gun for filleting and sealing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuperior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A\/B), hydraulic fluids (e.g., Skydrol), and engine oils.\u003cbr\u003eWide Service Temperature Range: Maintains flexibility, sealing properties, and conductivity across the typical operating temperatures of aircraft.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGood Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific \"B\" class variant (e.g., B-1\/2, B-2, B-4).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Aviation Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing Integral Fuel Tanks with Grounding Requirements: Used in fuel tanks where components (e.g., fuel probes, sensors) need to be electrically grounded to the airframe, or where lightning strike protection needs to be maintained across joints.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFastener Sealing with Conductivity: Applied around conductive fasteners (rivets, bolts) in fuel tank areas to ensure electrical continuity across the joint and prevent fuel leaks.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStatic Dissipation: Used to dissipate static electricity buildup in areas exposed to fuel, reducing the risk of ignition.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEMI\/RFI Shielding: Can contribute to maintaining electromagnetic interference (EMI) and radio frequency interference (RFI) shielding continuity across panel joints in fuel-wetted or electrically sensitive zones.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRepair of Electrically Conductive Seals: Used for repairing existing electrically conductive fuel tank seals that have degraded.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuel System Component Bonding: Applied where certain fuel system components need to be both sealed and electrically bonded to the surrounding structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS-3209-Class-B-TDS-English.pdf?v=1750098197\" style=\"background-color: #000; border: none; border-radius: 4px; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; width: 80%;\" target=\"_blank\"\u003eDownload Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Flamemaster","offers":[{"title":"Default Title","offer_id":52333608436084,"sku":"CS3209B2QT","price":300.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS3209B2QT.png?v=1750255265"},{"product_id":"flamemaster-cs-3209-b2-stm40-109-electrically-conductive-fuel-resistant-sealant-pint","title":"Flamemaster CS-3209 B2  - STM40-109 - Electrically Conductive Fuel Resistant Sealant - Pint","description":"\u003ch3\u003eFlamemaster CS-3209 B - STM40-109 - Electrically Conductive Fuel Resistant Sealant\u003c\/h3\u003e\n\u003cp\u003eCS 3209 Class B is a two-part, manganese dioxide cured polysulfide sealant uniquely engineered to be electrically conductive while providing excellent fuel resistance for aerospace applications. This innovative sealant incorporates conductive fillers, typically silver-coated particles, to create a low-resistance path, allowing for effective grounding or protection against static electricity and lightning strikes. The \"Class B\" designation indicates its trowelable consistency, making it suitable for application by spatula or extrusion gun for sealing seams, fasteners, and small access panels. Upon curing at room temperature, CS 3209 Class B forms a tough, flexible, and resilient rubber that maintains its integrity and conductivity even when exposed to aviation fuels, lubricants, and varying temperatures, ensuring both structural integrity and electrical continuity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features for Aviation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Part System: Composed of a base compound and an accelerator, mixed immediately prior to application.\u003cbr\u003ePolysulfide Chemistry: Provides outstanding resistance to a wide range of aviation fuels, hydraulic fluids, and lubricants.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrically Conductive: Contains conductive fillers (e.g., silver-coated glass beads or other conductive particles) to ensure electrical continuity across sealed joints, critical for grounding and EMI\/RFI shielding.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManganese Dioxide Cure: A robust curing agent that contributes to the sealant's durable properties.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass B Consistency: Trowelable, making it easy to apply with a spatula, spreader, or extrusion gun for filleting and sealing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuperior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A\/B), hydraulic fluids (e.g., Skydrol), and engine oils.\u003cbr\u003eWide Service Temperature Range: Maintains flexibility, sealing properties, and conductivity across the typical operating temperatures of aircraft.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGood Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific \"B\" class variant (e.g., B-1\/2, B-2, B-4).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Aviation Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing Integral Fuel Tanks with Grounding Requirements: Used in fuel tanks where components (e.g., fuel probes, sensors) need to be electrically grounded to the airframe, or where lightning strike protection needs to be maintained across joints.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFastener Sealing with Conductivity: Applied around conductive fasteners (rivets, bolts) in fuel tank areas to ensure electrical continuity across the joint and prevent fuel leaks.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStatic Dissipation: Used to dissipate static electricity buildup in areas exposed to fuel, reducing the risk of ignition.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEMI\/RFI Shielding: Can contribute to maintaining electromagnetic interference (EMI) and radio frequency interference (RFI) shielding continuity across panel joints in fuel-wetted or electrically sensitive zones.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRepair of Electrically Conductive Seals: Used for repairing existing electrically conductive fuel tank seals that have degraded.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuel System Component Bonding: Applied where certain fuel system components need to be both sealed and electrically bonded to the surrounding structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS-3209-Class-B-TDS-English.pdf?v=1750098197\" style=\"background-color: #000; border: none; border-radius: 4px; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; width: 80%;\" target=\"_blank\"\u003eDownload Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Flamemaster","offers":[{"title":"Default Title","offer_id":52333610074484,"sku":"CS3209B2PT","price":163.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS3209B2PT.png?v=1750255242"},{"product_id":"flamemaster-cs-3209-b2-stm40-109-electrically-conductive-fuel-resistant-sealant-6oz-copy","title":"Flamemaster CS-3209 B2  - STM40-109 - Electrically Conductive Fuel Resistant Sealant - 6oz.","description":"\u003ch3\u003eFlamemaster CS-3209 B  - STM40-109 - Electrically Conductive Fuel Resistant Sealant\u003c\/h3\u003e\n\u003cp\u003eCS 3209 Class B is a two-part, manganese dioxide cured polysulfide sealant uniquely engineered to be electrically conductive while providing excellent fuel resistance for aerospace applications. This innovative sealant incorporates conductive fillers, typically silver-coated particles, to create a low-resistance path, allowing for effective grounding or protection against static electricity and lightning strikes. The \"Class B\" designation indicates its trowelable consistency, making it suitable for application by spatula or extrusion gun for sealing seams, fasteners, and small access panels. Upon curing at room temperature, CS 3209 Class B forms a tough, flexible, and resilient rubber that maintains its integrity and conductivity even when exposed to aviation fuels, lubricants, and varying temperatures, ensuring both structural integrity and electrical continuity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features for Aviation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Part System: Composed of a base compound and an accelerator, mixed immediately prior to application.\u003cbr\u003ePolysulfide Chemistry: Provides outstanding resistance to a wide range of aviation fuels, hydraulic fluids, and lubricants.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrically Conductive: Contains conductive fillers (e.g., silver-coated glass beads or other conductive particles) to ensure electrical continuity across sealed joints, critical for grounding and EMI\/RFI shielding.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManganese Dioxide Cure: A robust curing agent that contributes to the sealant's durable properties.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass B Consistency: Trowelable, making it easy to apply with a spatula, spreader, or extrusion gun for filleting and sealing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuperior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A\/B), hydraulic fluids (e.g., Skydrol), and engine oils.\u003cbr\u003eWide Service Temperature Range: Maintains flexibility, sealing properties, and conductivity across the typical operating temperatures of aircraft.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGood Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific \"B\" class variant (e.g., B-1\/2, B-2, B-4).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Aviation Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSealing Integral Fuel Tanks with Grounding Requirements: Used in fuel tanks where components (e.g., fuel probes, sensors) need to be electrically grounded to the airframe, or where lightning strike protection needs to be maintained across joints.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFastener Sealing with Conductivity: Applied around conductive fasteners (rivets, bolts) in fuel tank areas to ensure electrical continuity across the joint and prevent fuel leaks.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStatic Dissipation: Used to dissipate static electricity buildup in areas exposed to fuel, reducing the risk of ignition.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEMI\/RFI Shielding: Can contribute to maintaining electromagnetic interference (EMI) and radio frequency interference (RFI) shielding continuity across panel joints in fuel-wetted or electrically sensitive zones.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRepair of Electrically Conductive Seals: Used for repairing existing electrically conductive fuel tank seals that have degraded.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuel System Component Bonding: Applied where certain fuel system components need to be both sealed and electrically bonded to the surrounding structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS-3209-Class-B-TDS-English.pdf?v=1750098197\" style=\"background-color: #000; border: none; border-radius: 4px; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; width: 80%;\" target=\"_blank\"\u003eDownload Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Flamemaster","offers":[{"title":"Default Title","offer_id":52333610566004,"sku":"CS3209B2KIT","price":67.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/2991\/9604\/files\/CS3209B2KIT.png?v=1750255224"}],"url":"https:\/\/145.aero\/collections\/stm-40-109.oembed","provider":"Aircraft Shop Supply","version":"1.0","type":"link"}