There are adhesive foams that are formulated for gun uses and adhesive foams that are formulated for adapter use. This means a double track in production, storage and use of adapter foams. The invention is a gun version that permits use of adhesive foams such as used in the adapter version....http://www.google.es/patents/US5683544?utm_source=gb-gplus-sharePatente US5683544 - Adhesive foam gun
