scope:

This specification covers the requirements for electrical silicone rubber sealing compounds that are not resistant to fuel. These compounds are intended for use in the temperature range of −62 to +204°C (−80 to +400°F).

The sealing compound is furnished in the following types, classes and grades, as specified (see 6.2):

The sealing compound is classified by viscosity of the base compound as follows:

Type I - Low viscosity

Type II - Intermediate viscosity

Type III - High viscosity

The sealing compound is classified as follows:

Class 1 - Fast cure (room temperature 25° ± 1°C [77° ±2°F])

Class 2 - Medium cure (room temperature 25° ±1°C [77° ±2°F])

Class 3 - Slow cure (room temperature 25° ±1°C [77° ±2°F])

Class 4 - Elevated temperature cure 80° ±1°C (175° ±2°F) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 414100B120-3, Highway 547, Lakehurst, NJ 08733-5100, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The sealing compound is furnished in the following grades:

Grade A - Condensation cure

Grade B1 - ersion resistant, condensation cure

Grade B2 - ersion resistant, addition cure

intended Use: