MIL-PRF-8516 Sealing Compund, Synthetic Rubber, Electric Connectors and Electric Systems, Chemically Cured


This specification covers a two-component, chemically cured synthetic rubber compound for insulating, sealing, reinforcing, and corrosion protection of electric connectors, wiring, and other electric apparatus. This specification has provisions for shelf-life extension (see 3.2.4).

SKU: 8516 Category:

Note: please refer to the appropriate technical performance specification, MIL-PRF-8516, and applicable technical documents under the MSDS/Documents Tab.


The synthetic rubber electrical connector sealing compound is furnished in the following types, classes, and categories:

Types. The types of sealing compound are as follows:

Type I – Low viscosity (100 to 400 poises, initial mixed viscosity)
Type II – High viscosity (401 to 1,200 poises, initial mixed viscosity)

Classes. The classes of sealing compound are as follows:

Class 1 – 24-hour cure at 77°F
Class 2 – 48-hour cure at 77°F
Class 3 – 72-hour cure at 77°F

Categories. The sealing compounds categories are as follows:

Category A – Two component kit
Category B – Premixed, degassed, frozen kit

Click On The Links Below To View Documents:

Military Performance Specification MIL-PRF-8516

Also Known As:

» MIL-S-8516

Unless otherwise specified in the contract or order, the base compound shall be supplied in the manufactured color and shall contrast with the curing agent to facilitate mixing (see 6.2). The material shall not be red in color.