Koresin Pellets Phenolic resin BASF Tackifier >> Phenolic ADHESIVE KORESIN® Pellets and Powder can be used as a high performance tackifier for natural and synthetic elastomers for improving long term building tack in compounds and cements. Condensation product of butylphenol and acetylene. Condensation product of butylphenol and acetylene. Can be used as a high performance tackifier for natural and synthetic elastomers. Provides improved long term building tack in compounds and cements.