Application & Coverage Rates | Intelligent Membranes

Application and coverage rates for Intelligent Membranes liquid airtight membranes — desktop banner

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Coverage will vary with substrate type, porosity, and surface condition. Always check thickness with awet film gauge during application to guarantee certified performance.

Passive Purple External / Passive Purple X / Passive Purple Retrofit

Substrates: OSB, plasterboard, blockwork, brickwork

OSB & Plasterboard → approx. 0.8–1.0 kg/m² (10–12 m² per tub)

Blockwork & Brickwork → approx. 1.0–1.2 kg/m² (8–10 m² per tub)

Notes:

Fire Class B airtight paint (External version).

KIWA, ICC, and Passivhaus certified.

Vapour-open, airtight, and smoke-tight.

X = new build focus; Retrofit = retrofit focus.

Passive Purple

Substrates: OSB, plasterboard

OSB & Plasterboard → approx. 0.8–1.0 kg/m² (10–12 m² per tub)

Notes:

Internal airtight paint for new builds.

Seamless, crack-bridging finish.

Passive Purple Brush (Fibre Reinforced)

Substrates: OSB, blockwork, junctions, penetrations
All substrates → approx. 1.2–1.5 kg/m² (6–8 m² per tub)
Notes:
Fibre-reinforced airtight paint.
Used for detailing, penetrations, and gap bridging.

airtight paint for joist ends on timber frame or masonry builds

Airtight White

Substrates: OSB, plasterboard, blockwork, brickwork
OSB & Plasterboard → approx. 0.8–1.0 kg/m² (≈11.4–14.25 m² per 11.4 kg tub)
Blockwork & Brickwork → approx. 1.0–1.2 kg/m² (≈9.5–11.4 m² per 11.4 kg tub)
Notes:
White airtight paint for clean internal finishes.

Study hall with vaulted ceilings and long row of tables with chairs

Poseidon Waterproof Membrane

Substrates: Cement boards, plasterboard (wet zones), concrete

All substrates → 7 kg = 8.75m² , 12 kg = 15m²

Flexible, crack-bridging waterproof membrane.

Applied in 2 coats.

For bathrooms, wetrooms, and behind tiles.

Liquid applied bathroom paint

The Goat Waterproof Membrane

Notes:
Substrates: Cement boards, plasterboard (wet zones), concrete
All substrates → approx. 2.0 kg/m² (≈9 m² per 18 kg tub)
Notes:
Heavy-duty liquid waterproofing membrane.
Applied in 2 coats.
Designed for wetrooms and high-moisture areas.

Intelligent Protect

Substrates: Glass, frames, finished surfaces
All substrates → approx. 0.4 kg/m² (≈25 m² per tub)
Notes:
Temporary peel-off protection.
Applied by spray (airless).

Supergrip

Substrates: Smooth or non-porous surfaces (metals, plastics, sealed surfaces)
All substrates → approx. 0.2–0.3 kg/m² (≈66 m² per tub)
Notes:
High-grip primer.

Lime Prime

Substrates: Lime plasters, stone, porous masonry
All substrates → approx. 0.15–0.25 kg/m² (≈40–65 m² per tub)
Notes:
Breathable primer for mineral substrates.

IM Primer

Substrates: Porous or dusty surfaces
All substrates → approx. 0.15–0.25 kg/m² (≈40–65 m² per tub)
Notes:
General-purpose primer.
Can be applied by roller, brush, or spray.

Key Notes

OSB & plasterboard absorb less → lower consumption.
Blockwork & brickwork are more porous → higher consumption.
Waterproofing membranes require two coats for full performance.
Always use a wet film gauge to confirm correct application thickness.