In this guide we’ll look at the best stain block paints for the UK market.
We’ve compared tin size, coverage per litre, touch dry time and cost
to give you our top recommendations.

What is the Best Stain Block Paint?

IMAGERECOMMENDED PRODUCTSPRODUCTFEATURES
  • Tin size: 1 litre
  • Coverage per litre: 10 m²
  • Touch dry time: 35 mins
  • Tin size: 250 ml
  • Coverage per litre: 9-10 m²
  • Touch dry time: 30 mins
  • Tin size: 250 ml
  • Coverage per litre: 5 m²
  • Touch dry time: 4 hours
  • Tin size: 1 litre
  • Coverage per litre: m²
  • Touch dry time: 2-3 hours
  • Tin size: 500 ml
  • Coverage per litre: 4 m²
  • Touch dry time: 2-3 hours

More Detailed Stain Blocker Paint Reviews

Zinsser Bulls Eye 123 Primer-Sealer Stain Killer

FEATURESRATINGPRICE
FEATURES
  • Tin size: 1 litre
  • Coverage per litre: 10 m²
  • Touch dry time: 35 mins
OUR RATING
PRICE
VIEW LATEST PRICE →

Zinsser Bulls Eye 123 Primer-Sealer Stain Killer Review

High-performance speciality coatings manufacturer Zinsser are one of the most reliable names out there when it comes to the best stain blocker paint. We tried out their Bulls Eye 123 Primer-Sealer Stain Killer and must praise its ability to cover stains and prepare surfaces while forming an effective moisture barrier.

It’s easy to apply with a brush, roller or sprayer and goes on the wall or ceiling like a regular paint. It’s ideal to use as an interior or exterior primer and is low-odour and water-based. It’ll cover up all sorts of nasty stains and creates a biocidal layer to stop moulds from taking hold. It’s simply the last and best paint for damp walls you’ll ever need to buy.

Rustins Quick Drying Stain Blocker Paint

FEATURESRATINGPRICE
FEATURES
  • Tin size: 250 ml
  • Coverage per litre: 9-10 m²
  • Touch dry time: 30 mins
OUR RATING
PRICE
VIEW LATEST PRICE →

Rustins Quick Drying Stain Blocker Paint Review

London’s best-known wood preservative brand Rustins have produce one of the best stain block paints on the UK market. It’s easy to use, works on a wide range of painted or bare surfaces, and is pleasantly low odour too.

It’s a matt white paint for use on walls or ceilings that have been stained by water, graffiti, tar, nicotine, crayon or even bitumen. We like Rustin’s Quick Drying Stain Blocker because it’s a versatile way to block out stains and water damage on most surfaces, ready for re-painting.

Ronseal One Coat Damp Seal

FEATURESRATINGPRICE
FEATURES
  • Tin size: 250 ml
  • Coverage per litre: 5 m²
  • Touch dry time: 4 hours
OUR RATING
PRICE
VIEW LATEST PRICE →

Ronseal One Coat Damp Seal Review

Famous for making products that do exactly what they say on the tin, we had high hopes for Ronseal’s One Coat Damp Seal. Most of the best damp seal paints need at least two coats before they work, but this stuff really works with a single application.

The super-thick paint can be applied to walls that are already damp, you just need to make sure they’re clean before you go ahead. Applied with a brush or roller, it can make a huge difference to damp walls with just a single application.

Polycell One Coat Stain Stop

FEATURESRATINGPRICE
FEATURES
  • Tin size: 1 litre
  • Coverage per litre: m²
  • Touch dry time: 2-3 hours
OUR RATING
PRICE
VIEW LATEST PRICE →

Polycell One Coat Stain Stop Review

Polycell One Coat Stain Stop is a highly pigmented paint that promises to block out stains and stop them from reappearing with just a single coat. It takes a while to dry, but with only one coat to do, it’s the best stain block paint that Polycell make.

It’s thick when applying and definitely not the easiest stuff to paint with, but it covers up persistent stains like nicotine, water damage and rust without any problems. We tested out the traditional paint-on version, but it’s also available in a spray can, which would suit someone not used to painting.

Polar One Coat Damp Proof Paint Stain Blocker

FEATURESRATINGPRICE
FEATURES
  • Tin size: 500 ml
  • Coverage per litre: 4 m²
  • Touch dry time: 2-3 hours
OUR RATING
PRICE
VIEW LATEST PRICE →

Polar One Coat Damp Proof Paint Stain Blocker Review

We’ve tested out some of Polar Specialist Coatings’ products in the past and knew they would produce one of the best damp seal offerings on the list. Polar use a special formulation known as Pliolite, a form of synthetic rubber resin that locks damp out of your walls permanently.

It’s a solvent-based paint, so you have to deal with some fumes, but as a one coat damp seal, it finishes well enough to be used as a topcoat. We tested out the brilliant white version, but it’s also available in magnolia, which is perfect for a lot of homeowners.

Conclusion

When you have damp walls and mould in your home, it’s unsightly, smelly and unhygienic. Luckily there are lots of great solutions out there, so we picked five of the best stain block paint options available right now. The winner, by far, is the Zinsser Bulls Eye 123 Primer-Sealer Stain Killer. It paints on so easily, can be used on just about any surface, and creates an effective barrier against persistent damp and stains.

See More Helpful Product Reviews

Search