Patent ID: 7297756

Claim:
A method of using a polyamide compound to seal cavities in soil, rock formations, building construction and walls comprising: injecting into said cavities a polyamide compound comprised of the reaction product of dimeric or polymeric fatty acids, C 4 -C 12 dicarboxylic acids, and one or more diamines, wherein: the polyamide compound is stabilized by the addition of a stabilizer selected from the group consisting of long chain arylalkylamines and pentaerythrityl tetrakis 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate; the polyamide compound does not contain any water-soluble or water-extractable environmentally toxic constituents, and the polyamide compound has a melt viscosity of 50 to 10,000 mPa·s, at 190° C., measured according to ASTM D 3236.