Specialty PVC for Aggressive Applications. The Tingley Safetyflex flame resistant specialty PVC on polyester jacket combines tough protection and comfortable fit. Made to resist industrial acids, chemicals, and caustics, Safetyflex is engineered for protection. Ideal Applications: Chemical handling, transport and storage, petrochemical drilling, refineries, and environmental clean up. Chemical Resistance: Many acids, oils, alcohols, salts and alkalies. Tingley is ISO 9001 Certified.