... rubber is dual-channel filtered by 80-100 screens and has excellent performances of air-tightness, thermostability, electricity ... insulation, amortization, low hydroscopicity, and resistance of acid-alkaline , aging, ozone, solvent,2. ... inner liner, butyl inner tyre, butyl capsule, waterproof roll and butyl rubber goods. FINE GRADE Butyl Reclaimed Rubber