Bound seams. Effective protection against a range of chemicals. Uses include PCB clean-up waste management hazardous response and nuclear environments. Rugged and durable even in environments where abrasion is an issue. DuPontâ?? Tychem® SL delivers effective protection against a range of chemical environments. Tychem® SL fabric provides at least 30 minutes of protection against >124 chemical challenges. Tychem® SL utilizes Saranex® 23-P film laminated to Tyvek® fabric to provide a rugged and durable fabric that resists abrasion. Typical applications: chemical mixing hazardous remediation emergency medical response paint spraying and nuclear environments