Reference

Tyvek and Tychem are both DuPont coveralls, but they fight opposite hazards: Tyvek is a breathable particle barrier and Tychem is a film-coated chemical barrier. Choosing wrong leaves workers exposed under OSHA 1910.132. This guide covers the materials, grade ladders, permeation, breakthrough time, seams, and a worked example.

No single glove material resists every chemical, and the wrong choice fails silently as the chemical permeates to the skin. This guide maps nitrile, neoprene, butyl, PVC, and Viton to the chemicals they resist, decodes ANSI/ISEA 105 permeation and breakthrough-time levels, and works a selection example from a Safety Data Sheet.