PR-2870 Class A is a light weight, non-chromate
corrosion inhibitive sealant. It has a service temperature
range from -80°F (-62°C) to 250°F (121°C), with
intermittent excursions up to 300°F (149°C). This
material acts as an effective corrosion inhibitor when
used with aluminum alloys or with dissimilar metals.
The cured sealant maintains elastomeric properties after
limited exposure to both jet fuel and aviation gas.
PR-2870 Class A is a two-part, epoxy cured Permapol®
P-3.1 polythioether compound. The uncured material
is suitable for application by brush up to a thickness of
25 mils. It cures at room temperature to form a resilient
sealant having excellent adhesion to common aircraft
substrates .
The following tests are in accordance with
MIL-PRF-81733 Type I, Class 2, Grade B test methods.
