MIL Spec Approved One Part Silicones

Military Specification MIL-A-46146 outlines the requirements for non-corrosive, room temperature-vulcanizing (RTV) silicone adhesive-sealants. These materials are specifically designed for applications involving sensitive metals and electronic equipment, where traditional, corrosive-cure silicones could cause damage. The standard ensures that products meeting its criteria will cure upon exposure to atmospheric moisture to form durable, rubbery compounds suitable for bonding, sealing, coating, and creating formed-in-place gaskets. Key properties include excellent adhesion to various substrates, electrical insulation characteristics, and stability across a wide range of temperatures.

Within the MIL-A-46146 specification, different "Types" are designated based on the material's consistency and flow properties. Type 1 refers to products that exhibit a "soft spreadable thixotropic paste" consistency. This non-sagging nature makes them ideal for applications where the sealant needs to maintain its shape, such as vertical or overhead installations, or for precise application around delicate components. These paste-like compounds are highly suitable for aerospace and electronics, providing robust bonding and protection for critical assemblies.