PR-1775 Class B is a non-chromate, corrosion inhibitive
sealant. It has a service temperature range from
-65°F (-54°C) to 250°F (121°C), with short term
recurring exposures (approximately 6 hours) to 360°F
(182°C). This material acts as an effective barrier
against the common causes of corrosion on aluminum
alloys or between dissimilar metals. The
cured sealant maintains excellent elastomeric properties
after exposure to both jet fuel and aviation
gas.
PR-1775 Class B is a two-part, manganese dioxide
cured, Permapol® P-5 polysulfide compound. The
uncured material is a low sag, thixotropic paste suitable
for application by extrusion gun or spatula. It
cures at room temperature to form a resilient sealant
having excellent adhesion to common aircraft
substrates.
The following tests are in accordance with AMS 3265
Class B specification test methods.
