PR-1826 Class B Rapid Curing Fuel Tank Sealant .
PR-1826 Class B is a rapid cure, aircraft integral fuel
tank sealant. It has a service temperature range
from -80°F (-62°C) to 320°F (160°C), with intermittent
excursions up to 420°F (216°C).
This material is
designed for fillet sealing of fuel tanks and other aircraft
fuselage sealing applications. The cured sealant
maintains excellent elastomeric properties after prolonged
exposure to both jet fuel and aviation gas.
PR-1826 Class B is a two-part, epoxy cured Permapol®
P-3 polythioether compound. The uncured material is
a low sag, thixotropic paste, suitable for application by
extrusion gun or spatula. Unlike standard polysulfide
fuel tank sealants, it can cure at low temperatures and
is unaffected by changes in relative humidity.
This
sealant has excellent adhesion to common aircraft
substrates when correctly primed with PR-1826AP
Adhesion Promoter.
The following tests are in accordance with
