Features Dupont™ Tychem® 4000 Delivers Effective Protection Against A Range Of Chemical Environments. Tychem® 4000, Utilizes Saranex™ 23-P Film Laminated To Tyvek® Fabric To Provide A Rugged And Durable Fabric That Resists Abrasion. Tychem® 4000 Fabric Provides At Least 30 Minutes Of Protection Against More Than 124 Chemical Challenges. Typical Applications: Chemical Mixing, Hazardous Remediation, Emergency Medical Response, Paint Spraying, And Nuclear Environments.