sealants Flashcards
pre-measured, mixed, and frozen at extremely low temp
PMF
material used to make sealant applicators
phenolic/plastic
intended for fillet and faying surface with removable structure, not high temp or structural
AMS 3284
type of sealant called “one-part” and ready for use
pliable
coating to protect exterior laminated plastic parts from rain erosion
elastomeric
sealants(polysulfides) application time is shortened when applied in an environment with humidity over ___
50%
PMF can be thawed in _ different ways
2
preferred topcoat for markings and propeller safety stripes
Acrylic Laquer
sealant used for rivets, not suitable for integral fuel tanks
MIL-PRF-81733
do not use zinc chromate primer on areas exposed to temps over
175F
combustible liquids have a flash point between
100°F and 200°F
flammable liquids have a flash point under
140°F
polythioether sealants (AMS 3277) require extremely low temperature of what refrigeration for retention
-80F
sealant intended for sealing firewalls against passage of air and vapors
AMS 3374
type of sealants that cure independently of humidity conditions
Polythioether
sealant is a multi-purpose aircraft structure and integral fuel tank sealant with rapid ambient and low temp curing capability
AMS 3277
which sealant tape consists of an extruded gasket with pressure sensitive adhesive backing
ePTFE
