By Extreme Paints

Extreme Paints Clear Polyurethane Concrete Primer & Floor Sealer

£39.99 - £84.99
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Size: 20 Litres
Regular price £84.99
Regular price Sale price £84.99
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Regular price £84.99
Regular price Sale price £84.99

Extreme Paints Clear Polyurethane Concrete Primer & Floor Sealer is a single‑pack, low‑viscosity polyurethane that soaks deep into porous concrete, binding loose particles and forming a resilient, dust‑free surface. Applied before our Extreme Paints PU Floor Paint, it promotes exceptional inter‑coat adhesion and reduces the risk of future delamination, even under forklifts, pallet trucks and constant foot traffic.

Used alone, the product delivers a hard‑wearing satin sheen that repels oil, water and most household chemicals while allowing the natural concrete colour to show through. Manufactured in the UK to ISO 9001 standards, each batch is quality‑checked for viscosity, penetration depth and cure speed, guaranteeing consistent professional results.

Spreading Rate (Coverage)

Approximately 6–10 m² per litre, per coat, depending on substrate porosity.

Drying Time

Touch dry in 4‑6 hours @ 18 °C with good ventilation. Allow at least 8 hours before over‑coating or opening to light use.

Storage

Keep containers tightly closed, upright and away from heat or flames. Store between 5 °C and 30 °C.

Thinners / Clean‑up

White spirit or polyurethane thinner. Do not thin in excess of 5 %.

Surface Preparation

Concrete must be sound, dry (< 4 % moisture) and free of grease, dust, laitance and loose paint. Acid‑etch or mechanically abrade power‑floated surfaces to ensure penetration.

Safety Disclaimer: This solvent‑based coating contains flammable solvents and must be used only in well‑ventilated areas. Avoid inhaling vapours and prolonged skin contact. Keep away from heat, sparks and open flames. Wear appropriate PPE including gloves and, if necessary, a respirator. Dispose of waste in accordance with local regulations. Keep out of reach of children. For full safety information, consult the product Safety Data Sheet (SDS).

Disclaimer: In periods of high demand, your order may arrive in a plain white tin with the correct product label applied. This does not affect quality or volume.*

 

Property Value
Components1-part single pack
BasePolyurethane resin
FinishClear satin
Recommended coats1 (primer) or 2 (sealer)
Wet film thickness50 µm per coat
Coverage6–10 m² per L per coat
Touch dry4–6 h @ 18 °C
Recoat window4–6 h
Full cure7 days
Property Value
Application toolsBrush, roller, HVLP, airless, pump sprayer
Clean-upWhite spirit / PU thinner
Shelf life24 months unopened
Pack sizes5 L, 10 L, 20 L
Colour optionsClear
Interior / exteriorBoth
Suitable substratesConcrete, cement, stone, porous masonry
VOC< 420 g /L
Primer requiredYes – on bare or rusty steel
  1. Prepare Surface – Remove dust, oil, algae and flaking coatings. Etch power‑floated floors.
  2. Mix – Stir product thoroughly with paddle mixer for 2 minutes.
  3. Primer Use – Apply one thin, even coat (≈ 50 µm WFT) by roller, brush or airless sprayer. Avoid pooling.
  4. Standalone Sealer – Apply two thin coats (optional third for higher sheen), allowing 4‑6 hours between coats.
  5. Curing – Light traffic after 8 hours, heavy traffic after 48 hours, full chemical resistance after 7 days.

Below are the technical specifications of this coating. For any additional data or in‑depth advice, please email support@tradesuppliesul.co.uk or call our mobile helpline on 07929 525648 and a specialist will be happy to assist.