YS Oil D Terpene Yasuhara Tackifier >> Terpene ADHESIVE Terpene. Used as a tackifier for adhesives (EPT). Possesses acid and alkaline resistance. Improves color, heat stability and weather-proof. Offers compatibility with elastomers and base polymers. Terpene. Used as a tackifier for adhesives (EPT). Possesses acid and alkaline resistance. Improves color, heat stability and weather-proof. Offers compatibility with elastomers and base polymers.