Struktol Strukrez 160 Hydrocarbon resin Struktol Plasticizers STRUKTOL ® STRUKREZ 160 RESIN/PLASTICIZER Hydrocarbon resin. STRUKTOL ® Strukrez 160 is used for improved mixing and processability of "nervy" compounds. Al-though STRUKTOL ® Strukrez 160 is not a phenolic resin, improvement in green tack can be noted. 4 - 8 phr Hydrocarbon resin. Used as a plasticizer. Improves mixing and processability of "nervy" compounds and green tack. Use level: 4-8 phr.