FOAM-LOKTM Retrofit Foam is specifically designed for injection and pour applications into existing wall cavities and block wall constructions. The FOAMLOKTM Retrofit Foam provides the same physical properties characteristics of the FOAM-LOKTM Open Cell spray applied insulation system and allows the applicator to insulate and air seal existing walls without removing the interior face of the existing wall. FOAM-LOKTM Retrofit Foam may also be used to insulate the cavities of existing block wall constructions.