the white grease has more "cling" than the almost clear silicone type. You can also get plastic sheet material with good thermal coefficient for insulator. Thinner than mica. 73, Stuart K5KVH -- FAQ on WWW: http://www.contesting.com/FAQ/tentec Submissions: tentec@contesting.com Administrative requests: tentec-REQUEST@contesting.com Problems: owner-tentec@contesting.com