Struktol TH 64 Mixture of resins Struktol Tackifier >> Hydrocarbon resin STRUKTOL ® TH 64 TACKIFYING RESIN Mixture of low molecular weight resins. STRUKTOL ® TH 64 can be used as a tackifier for natural and synthetic elastomers for improving long term building tack in compounds. 2 - 10 phr Mixture of low molecular weight resins. Used as a tackifier for natural and synthetic elastomers. Improves long term building tack. Use level: 2-10 phr.