PHS Airtight Liquid Membrane

PHS Airtight Liquid Membrane is a VOC free, water based, flexible, fibre reinforced polymer. It provides a unique and sustainable solution for airtight construction junctions in both new builds and retrofits.

PHS Airtight Liquid Membrane is brush applied to create an uninterrupted airtight and vapourtight seal around penetrations, chases, floor to wall junctions, wall to ceiling junctions, and roof connections.


PHS Airtight Liquid Membrane creates a seamless and continuous airtight and vapourtight seal over cracks and gaps. Because the seal perfectly follows the contours of the substrate and in combination with the high flexibility and superior adhesion, the connections remain airtight over a long period of time. It is a fast, flexible and durable solution for all airtight connections.

Field of use

Floor to wall junctions,

Ceiling to wall junctions,

Window/door jambs,

Steel decks,

Behind sockets boxes and wall chases,

Renovation, new & old material interfaces,


Where services penetrate surfaces – pipes, cable, ducting, etc.


5kg Bucket


Versatile for use on a wide variety of building materials like concrete, stone, wood, metal, aluminium, insulation, EPDM, etc.*

Suitable for new buildings and renovation,

Seamless and secure even with difficult connections,

Quick and easy application,

Can be applied to slightly damp surfaces,

Can be plastered, rendered or painted over,

Optimal product for materials of different coefficients of expansion,


Extensively tested for adhesion and elasticity.