Trusted and praised by customers ★★★★★
Need Help? support@tradesuppliesuk.co.uk

5% OFF all products

TSU5OFF
  • Free Next-Day Delivery

  • Best Price Promise

  • Five-Star Rated ★★★★★

  • FREE AND FAST TECHNICAL ADVICE

Quality Image 1
Quality Image 2
Quality Image 3
Quality Image 4

Extreme Paints Clear Polyurethane Concrete Primer & Floor Sealer 20.0 kg

Manufactured by Extreme Paints

Why Choose Our Products?

Icon

Deep penetration stops concrete dust

Icon

Excellent base for PU floor paints

Icon

Cuts delamination on heavy films

Icon

Hard‑wearing clear satin protection

Icon

Touch dry in four to six hours

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

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.*

 

  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.

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
COVERAGE CALCULATOR
MEASURE YOUR DIMENSIONS

Frequently Asked Questions

Why do I need a polyurethane concrete primer?
It penetrates deeply, binds surface dust, and creates a strong anchor so polyurethane floor paints adhere firmly to concrete.
Can I use it under acrylic or epoxy paints?
No—this primer is specifically formulated for polyurethane systems and may be incompatible with water-based or epoxy coatings.
Will the clear finish darken my concrete?
It may slightly deepen the tone, giving a natural satin appearance without significantly changing the original colour.
How soon can I apply the coloured polyurethane floor paint?
After 8 hours at 18 °C or once the primer feels firm and dry to the touch.
What is the coverage on rough concrete?
Approximately 6 m² per litre on rough surfaces; smoother concrete may achieve up to 10 m².
Does it stop concrete dusting permanently?
Yes—it binds loose surface particles, eliminating ongoing dust generation.
Can I spray it?
Yes—use HVLP or airless spray with a 0.015–0.019″ tip, thinning up to 5 % with PU thinner if needed.
Is it suitable for outdoor driveways?
Yes—once fully cured, it resists UV, rain, and temperature fluctuations.
How do I clean equipment after application?
Clean brushes and rollers immediately with white spirit or dedicated polyurethane thinner.
What temperature range is best for the application?
Apply between 10 °C and 25 °C; lower temperatures or high humidity can slow curing.
Can I use it on previously painted floors?
Yes, provided the existing coating is sound and solvent-based—always perform an adhesion test first.
How long before it reaches full chemical resistance?
Seven days at 18 °C; avoid harsh chemicals until fully cured.
Is it food-safe when dry?
It is not certified for direct food contact; safe for garages, workshops, and similar environments.
Does it yellow over time?
The clear satin finish may amber slightly under prolonged UV exposure but remains transparent.
How should I store leftover product?
Reseal the container tightly and store upright in a cool, frost-free location for up to 24 months.

Select Variant and Order

Regular price £84.99 (inc VAT)
Tax included Shipping calculated at checkout.
Our Experts Recommended

Express Delivery Available!

Size

FAST NEXT DAY DELIVERY OPTION
AVAILABLE FOR THIS ITEM.
*subject to stock levels at the time of your order.