Tyvek® FireCurb® Housewrap takes the airtight and watertight yet vapour-open breather properties of other Tyvek® membranes and adds flame retardancy properties that can significantly increase building safety. It is a lightweight, advanced, fire retardant membrane that self-extinguishes when ignited. It uses a halogen-free flame retardant coating to reduce the formation of droplets and smoke with minimal environmental impact.