Collection: Airtight Paint

Airtight paint for walls, ceilings and floors — a continuous, liquid-applied airtight layer you spray, roller or brush straight onto blockwork, OSB and plasterboard. The range is built around Passive Purple, Passivhaus certified, BBA approved and tested to both ASTM and EN standards (ICC-ES ESR-4715), alongside Passive Purple X (reaction to fire Class B), Passive Purple External for façades and Passivhaus Airtight Sealant for junctions. Used with our tapes and sealants as one airtight system, it's how new builds, retrofits and Passivhaus projects hit their air test numbers first time.