Answer: isoprene

AnswerCrossword Clue
ISOPRENE

Rubber ingredient

ISOPRENE

Petroleum processing by-product

ISOPRENE

Volatile, water-insoluble liquid

ISOPRENE
Synthetic-rubber ingredient
ISOPRENE
Liquid in synthetic rubber manufacture
ISOPRENERubber compound
ISOPRENESynthetic rubber base
ISOPRENEPetroleum byproduct used to make synthetic rubber