NEDC manufactures silicone foam gaskets. However, NEDC is also a die-cutting manufacturer of silicone foam that can serve as thermal insulation.
Silicone Rubber Strips 60A Medium Hardness — Rubber Sheet Warehouse®
Silicone - Wikipedia
High Temperature Heat Resistant Silicone Rubber Foam, Sponge
Silicone Rubber Products Custom Products • Seal & Design, Inc
Sponge Rubber Sheet - Silicone Sponge Rubber Sheet Other from
Thermally Conductive Silicone Sponge - The Rubber Company
What's the silicone foam and application ?
MATERIALS FoamInsider
Heat Resistant Low Density Soft Silicone Sponge Foam Hose
High Temperature Silicone Sheets - The Rubber Company