Alumilite Corporation
225 Parsons St.
Kalamazoo, MI 49007
(616) 342-1259

Alumilite casting plastic, RTV, casting supplies, casting videos.

Miniaturemolds.com

Alumilite, RTV, general casting supplies. Casting instructions, also.

MicroMark,
340 Snyder Ave.
Berkeley Heights, NJ 07922-1595

CR-300 plastic casting resin, RTV, general casting supplies, small tools.

Thomas' Register of American Manufacturers

A veritable gold mine of information. Dow Corning and General Electric both have extensive descriptions of their silicone products in the Catalog File. You can find this in the reference section of your library.