Sealing Compound (MIL-S-8516). MIL-S-8516 is
an accelerated, synthetic, rubber sealing compound
used for sealing low-voltage electrical connectors,
wiring. and other electrical equipment against
moisture and corrosion where temperatures do not
exceed 200°F. This sealant has very good resistance to
fuels, oils, grease, water, and humidity. However, it is
NOT authorized for use in engine bays, keel areas, or
areas adjacent to bleed-air ducts. It is manufactured in
kit form and comes in sizes from 2.5 ounces to 1 quart.
MIL-S-8516 is available in three classes with different
Curing time in hours
Silicone Rubber Sealant (MIL-S-23586). Room
temperature vulcanizing (RTV), silicone rubber
sealant is used for sealing small electrical connectors
and electrical components that are located in areas
where the temperatures are between 200°F and 450°F.
This sealant has good resistance to weathering,
moisture, and withstands ozone. RTV silicone rubber
sealant is available in two types, both used for the same
purposes. The two types are type II, class 2, grade A,
and type 1, class 1, grade B- 1. Type II, class 2, grade
A contains cure volatiles and should be used only in
Adhesive Silicon Sealant (MIL-A-46146). Also
known as 3145 RTV. A noncorrosive sealant for use
on sensitive metals and avionics equipment in areas
that are exposed to temperatures between 250°F and
350°F. This sealant comes in 3-, 8-, and 12-ounce
Many RTV silicone sealants contain an
acetic acid curing agent. These sealants, when
in contact with metal, cause rapid corrosion.
RTV sealants that contain acetic acid are
NOT authorized for use on electronic or elec-
trical circuits. They may be identified by the
emission of a vinegar odor while in a liquid
or curing state.
Q81. Complete information on the types and
applications of aircraft paint systems is
contained in what publication?
Q82. After it is mixed, the storage life of
epoxy-polyamide primer is limited to the amount
that can be used in how many hours?
Q83. What is the standard, general-purpose, exterior
protective coating for aircraft surfaces?
What are the two classes of spray guns?
Q85. When flammable materials are used, all sources
of ignition must be at least how far away from the
This chapter identifies the manuals and procedures
used to detect and combat corrosion on naval aircraft
and support equipment. It identifies the types and
causes of corrosion. Familiarize yourself with types
and uses of cleaning materials and the procedures and
materials for preservation and depreservation. This is