PPG Aerospace PRC-Desoto P/S 870 Class C corrosion inhibitive sealant with a 12 hour application life. It has a service temperature range from -65F (-54C) to 250F (121C), with intermittent excursions up to 275F (135C). This material acts as an effective barrier against the common causes of corrosion on aluminum alloys or between dissimilar metals. The cured sealant maintains elastomeric properties after limited exposure to both jet fuel and aviation gas.P/S 870 Class C is a two-part, manganese dioxide cured polysulfide compound. The uncured material is designed for roller and faying surface sealing applications. It cures at room temperature to form a resilient sealant having excellent adhesion to common aircraft substrates.SPEC: MIL-PRF-81733 Type IV
