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