SM 750 Acrylic copolymer Schnee-Morehead Acrylics/ Acrylates SEALANT Crosslinking acrylic copolymer SM 750 is an oxidative cure, self cross-linking, acrylic copolymer in toluene solution. SM 750 is used to compound high performance sealants for exterior construction joints, fenestration, and general use. Oxidative cure and self cross-linking, acrylic copolymer in toluene solution. Used to compound sealants for exterior construction joints, fenestration, and general use.