Finally you can use Xylene as both a deparaffinizing agent and clearing agent without constantly replacing cracked or warped caps!
Increase lab safety and savings by minimizing Xylene fumes and volume lost from evaporation. As you know, over time, plastic caps will warp, crack, and disfigure when used with Xylene. Glass lids are also used on coplin jars, but do not seal well, increasing the risk of inhaling dangerous fumes. These caps feature a Teflon liner inside making them resistant to solvents. The liner also forms a tight seal when screwed on, creating a leak-proof container to avoid evaporation and fumes.