A solvent-based, high-quality stain-blocking primer sealer based on modified alkyd resin with a flat matt finish. Suitable for interior and exterior use on previously painted surfaces, cured plaster and cement coatings, concrete, brick, metals, wood and rigid PVC. It seals difficult stains—including nicotine, water stains, smoke, graffiti and tannin bleed—and can be over-coated with water- or solvent-based paints.
Formulated as a high-opacity barrier sealer, it locks in common household and site stains—including nicotine, smoke, water marks, graffiti inks and water-soluble tannins—so they don’t telegraph through subsequent coats. On mixed substrates it evens out porosity and colour, creating a uniform, paint-ready surface that accepts both water- and solvent-based topcoats without reactivation. The fast-drying, easy-to-apply film helps accelerate turnaround while maintaining consistent, professional results. Choose it whenever speed, reliable stain blocking, strong adhesion and cross-system compatibility are essential on the same job.
Ensure substrates are sound, clean, suitably dry and free from contaminants that impair adhesion; remove loose/flaking coatings and repair defects.
Chalking/weathered/porous powdery surfaces: treat with a colourless surface stabiliser.
Metals: remove oil and rust.
Wood: sand with the grain; remove dust and any seeping resin; treat bare wood with a wood preserver.
Before priming stained areas, remove as much of the stain as possible by washing, sanding or scraping.
For full guidance, refer to the Technical Data Sheet at wrxtrade.co.uk.
Do not apply in damp/humid conditions or below +8 °C.
Stir well before use. Ready to use; if required, thin up to 10% dearomatised white spirit (over-thinning may reduce stain-blocking and adhesion).
Apply by brush, medium-pile roller or spray. Load the brush generously, apply evenly, avoid over-spreading.
In most cases one coat is sufficient; porous areas or some stains may need a second coat.
Up to 12 m² per litre in a single coat, depending on surface smoothness and absorbency.
Touch dry: ~30 minutes
Recoat: 3 hours (longer in high humidity/low temperatures).
Ensure adequate ventilation during drying.
Remove excess product from tools; clean immediately with mineral spirits/paint thinner.
Do not pour leftovers into drains or watercourses; consult local authority facilities.
Reseal the lid firmly.
Store and transport upright in dry conditions; protect from direct sunlight, frost and extreme temperatures.
Flammable liquid and vapour. May be fatal if swallowed and enters airways. May cause drowsiness or dizziness. Keep away from heat/sparks/open flames/hot surfaces—no smoking. Avoid breathing vapours/spray.
IF SWALLOWED: Call a poison centre/doctor immediately.
IF INHALED: Move to fresh air and rest.
Repeated exposure may cause skin dryness or cracking. Warning: hazardous respirable droplets may form when sprayed—do not breathe spray or mist. Hazardous component requiring labelling: Hydrocarbons C9–C11, n-alkanes, isoalkanes, cyclics, <2% aromatics (64742-48-9). Store in a well-ventilated place; keep container tightly closed; dispose of contents/container via licensed companies.
EU limit (Cat. A/i): 500 g/L (2010). This product contains max. 415 g/L VOC. VOCs (Volatile Organic Compounds) contribute to atmospheric pollution.
