Thanks to its hiding power, our Stain Block visibly prevents the stains from showing through the paint. With its high coverage Valspar Stain Block is quick and easy to apply, ensuring a faster and more durable finish for your decorating project. For the best results, use with Valspar Premium Blend v700™ Walls & Ceilings.

Available in 750ml, 2.5L - Pure Brilliant White

Stain Block Primer & Undercoat

Stain Block Primer & Undercoat is rated 1.0 out of 5 by 7.
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Rated 1 out of 5 by from Very poor product not fit for purpose Purchased valspar stainblock last week, painted onto kitchen wall grease stains (after cleaning), and the stain came through. Repeated process, came through again. Will be returning this product at earliest opportunity. Waste of time and money.
Date published: 2020-03-26
Rated 1 out of 5 by from Awful - water stain just came back through :( I’ve used Valdosta emulsion and it’s amazing so thought I’d try this as our roof has leaked so we’ve got watermarks in our bedroom. Really disappointed and hasn’t worked at all :( Wish I’d read the reviews on here before getting it!
Date published: 2020-06-27
Rated 1 out of 5 by from Pointless Absolutely pointless!!!! How does a product like this even make it to market 4 coats and water stains still there Don’t waste your time and money just use oil based paint instead
Date published: 2020-03-14
Rated 1 out of 5 by from Really doesn't work Purchased in a B&Q store, wish I had looked at reviews online beforehand. Unfortunately very thin, does not block stains.
Date published: 2020-07-19
Rated 1 out of 5 by from Utterly useless I can also confirm this product does not work. Had to use a shellac-based product instead - worked perfectly.
Date published: 2020-07-16
Rated 1 out of 5 by from Does not work Bought 2 days ago for some small brown stains on ceiling from a leak have done it twice stain still there
Date published: 2020-06-14
Rated 1 out of 5 by from Do not buy this product Bought this paint (stain block) does not stain block the problems that I had on my ceilings
Date published: 2020-05-26
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Bathroom Paint

How much do I need?

Paint Coverage Calculator

Simply enter the size of the area you'll be painting and our calculator will tell you how much product you need. 

Calculations are based on one coat of paint.

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m

You will need 30L to cover this area