FOAM-LOK Retrofit Foam is specifically designed for injection and pour applications into existing wall cavities and block wall constructions. The FOAM-LOK Retrofit Foam provides the same physical properties characteristics of the FOAM-LOK 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-LOK Retrofit Foam may also be used to insulate the cavities of existing block wall constructions.