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PHS Airtight Liquid Membrane

PHS Airtight Liquid Membrane Airtightness



In stock

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.

– 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.

Color: blue (wet), black (dry)
Basis:  waterborne polymer paste reinforced with fibres
Application Temperature: +5C
Storage Temperature: +5C to +20C
Packaging: 5kg
SD value:  >10
Density:    1.2kg/Litre
Airtightness:  0.07m3/H.M (50 Pa); EN 12114: 2000
Elongation:  >230%, EN12311-1
Diffusion Resistance:  76584, EN12572
Adhesion on Concrete: 1.9N/mm2, ISO 4624


Consult the safety data sheet prior to application. Always work in well-ventilated areas. Avoid skin contact when product is in wet condition. Requested to wear eye protection, mouth mask, gloves and safety wear during application.

Test reports and certifications
This table contains average values from independent testreports and certifications. Values obtained after ageing of the samples are marked with « v ».

















1. PHS Airtight Liquid Membrane is ready-to-use; mix with hand mixer before application. Do not dilute with water or solvents.
2. Apply PHS Airtight Liquid Membrane in two layers with a brush, at a total consumption of (indicative) 0,8–1 kg/m2.
3. Drying time may vary and depends on local conditions and condition of the substrate. Indicative: 24–48hr.

Other characteristics
– Average consumption: 0,8 – 1 kg/m2 (indicative, depending on substrate),
– Density: +/- 1,15 kg / litre,
– Available colours: blue (drying to black airtight coating) & white (drying to white airtight coating),
– Indicative drying time: 0,5 to 24 hours (depending on substrate temperature, air humidity, applied layer thickness and ventilation),
– Storage: 5–20C; stored dry, out of direct sunlight; conservation: 12 months from date of production, original unopened packaging.

Part Number:  Size:  Box quantity: Barcode:
AR9066 5kg 1 05391536370176