Integral Fuel Tank Sealant - Meets AMS-S-8802, Type II, Class B 1/4 Sealant. Designed to withstand the attck of sulfur compounds present in jet fuels. Also used as a pressurized cabin sealant. Alternates with PR-1440, PS1440, PS-890, and MC-236.Type II, Class A 1/2 Sealant.