INCH-POUND
A-A-56023B
5 November 2010
SUPERSEDING
A-A-56023A
15 February 1994
COMMERCIAL ITEM DESCRIPTION
INSULATING COMPOUND, ELECTRICAL, SILICONE RUBBER,
ROOM TEMPERATURE VULCANIZING
The General Services Administration has authorized the use of this
commercial item description for all federal agencies.
1. SCOPE. This commercial item description (CID) covers four types of room temperature
vulcanizing, silicone rubber electrical insulating compounds. The insulating compounds are
intended for use in potting and encapsulating electrical and electronic components.
2. CLASSIFICATION. The insulating compounds shall be classified by the following types, as
specified (see (7.4(b)):
Type I
-
Viscosity, 200 to 500 poises
Type II
-
Viscosity, 200 to 600 poises
Type III
-
Viscosity, 300 to 900 poises
Type IV
-
Viscosity, 80 to 250 poises
3. SALIENT CHARACTERISTICS
3.1 General Requirements. The insulating compounds shall consist of an organo-polysiloxane
polymer which, when mixed with a catalyst, shall cure to a rubbery solid. Cure shall be affected
by catalytic action, not solvent evaporation. The insulating compounds shall have a shelf life of
not less than six months when stored in the original unopened containers at a temperature not
greater than 26.7 ºC. The glass transition temperature (tg), or softening point, shall be as
specified by the manufacturer when tested in accordance with IPC-TM-650, method 2.4.24, "IPC
Test Methods Manual, Glass Transition Temperature and Z-Axis Thermal Expansion by TMA".
The insulating compound materials shall be homogeneous and free of foreign materials, and shall
be packaged in clean well-sealed containers, in capacities specified by the contract. The physical
Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data
that may improve this document should be sent to: STDZNMGT@dla.mil or Defense
Logistics Agency Aviation VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616.
Since contact information can change, you may want to verify the currency of this address
information using the ASSIST database at https://assist.daps.dla.mil/.
FSC 5970
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
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