Passive Purple — the liquid airtight membrane. Airtight vapour control, radon barrier, methane barrier, smoke tight.

Passive Purple

The paint that started it all. Passive Purple is our liquid-applied airtight and vapour control membrane — Passivhaus certified, BBA approved, tested to both ASTM and EN standards (ICC-ES ESR-4715), and a tested radon and methane barrier to boot. This collection gathers the whole family: spray/roller and brush grades, Airtight White for a lighter finish, Passive Purple External for façades, Retrofit Airtightness paints, plus the tapes and sealants that complete the airtight system. One purple coat, one continuous membrane, one air test passed.

17 prodotti