P / S 870 Class C is an anti-corrosion sealant. Service temperature range from -65 ° F (-54 ° C) to 250 ° F (121 ° C), with intermittent trips up to 250 ° F (121 ° C), up to 275 ° F (135 ° F) has. ° C). This material acts as an effective barrier against common causes of corrosion on aluminum alloys or between different metals. Cured sealant retains its elastomeric properties after limited exposure to both jet fuel and aircraft gas.

P / S 870 Class C is a two part, manganese dioxide cured polysulfide compound. Designed for uncured material, roller and faying surface sealing applications. It cures at room temperature to form a flexible sealant with excellent adhesion to common aircraft surfaces.