Zinsser Cover Stain 1lt

Zinsser Cover Stain 1 Litre is a high-performance solvent-based primer, sealer and stain-blocking undercoat designed to prepare, stabilise and protect a wide range of surfaces before decorating. Its robust formula delivers reliable adhesion, excellent stain blocking and broad compatibility with both water-based and solvent-based topcoats, making it ideal for demanding interior and exterior preparation tasks.

Key Features

• Pack Size: 1 Litre

• Primer Type: Solvent-based primer, sealer & stain blocker

• Colour/Base: White (tintable to pastel or mid-tone shades)

• Application: Brush, roller, pad or airless spray

• Coverage: Typically up to ~9.8 m² per litre (varies with surface texture and porosity)

• Drying Time:

  • Touch Dry: Approx. 30–35 minutes

  • Recoat: Around 2 hours (depending on conditions)

• Clean-Up: Use appropriate solvent/paint thinner after use

Performance & Benefits

Powerful Stain Blocking & Sealing
Zinsser Cover Stain is formulated to block stubborn stains including water marks, smoke damage, tannin bleed, nicotine and other discolouration, preventing them from bleeding through subsequent topcoats.

Superior Adhesion to Challenging Substrates
The solvent-based formula penetrates and bonds strongly to a variety of surfaces — including smooth, glossy and dense substrates — often without the need for sanding, saving time during preparation.

Interior & Exterior Use
Suitable for use on both internal and external surfaces such as walls, trim, wood, metal, PVC and masonry, making it a versatile foundation for repainting or renovation projects.

Universal Topcoat Compatibility
Once dry, Cover Stain accepts both water-based and solvent-based topcoats, providing flexibility in decorative finishes.

Recommended Applications

Use Zinsser Cover Stain Primer & Sealer 1 Litre before painting on:

• Interior plaster, drywall and plasterboard

• Painted or bare wood and joinery

• Masonry and brickwork

• Metal surfaces including steel, iron and aluminium

• PVC and uPVC panels

• Areas affected by stubborn stains or discolouration

Surface Preparation & Application

1. Prepare Surface: Ensure surfaces are clean, dry and free from dust, grease and loose material.

2. Stir Thoroughly: Mix the primer well before and during use.

3. Apply: Use a brush, roller or spray system for even coverage across the surface.

4. Dry: Allow the primer to touch dry in approximately 30–35 minutes.

5. Recoat: Ready for topcoat after about 2 hours under normal conditions.

6. Cleanup: Clean tools with suitable solvents or paint thinner after use.

Why Choose Zinsser Cover Stain Primer & Sealer 1 Litre?

Zinsser Cover Stain 1 Litre offers professional-grade stain-blocking performance, strong substrate adhesion, and wide surface versatility in a compact pack size. Its ability to block tough stains, bond to challenging surfaces and provide a universal base for both water- and solvent-based topcoats makes it an excellent choice for renovation, repair and decorative painting projects where a solid primer foundation is crucial.