SI Group offers Alkylphenols Reactive Adhesive Strengthening Resins. SI Group is an ISO 9001, 14001 and 18000 registered organisation. Alkylphenols Reactive Adhesive Strengthening Resins is typically used in solvent based chloroprene adhesives to add hot bond strength. Alkylphenols Reactive Adhesive Strengthening Resins may also be used as a modifier for alkyd resins when high hardness films are desired. It is supplied in flake form.