PR-1770 Class C is a two-part, high temperature resistant, faying surface sealant for use over a temperature range of -55°C to +180°C, with outstanding resistance to aircraft fuels and lubricating oils and resistance to degradation by phosphate ester type hydraulic oils. PR-1770C is a manganese dioxide cured sealant based on Permapol® P-5 liquid polymers, a chemically modified, improved class of polysulphide polymers covered by US Patent 4,623,711. The uncured sealant is a thick liquid suitable for application by brush or roller. The cured sealant maintains excellent elastomeric properties after prolonged exposure to aircraft fuels.
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