Cover Stain - 2.5L | Solvent-based primer and sealer for stain blocking, surface preparation and adhesion to interior and exterior substrates.

Excellent product. A name I know and trust. Great quality. Does the job. Covered stains and dries well. Would recommend.

Two weeks ago failed grouting in shower caused water staining in room below. I left it for a week to dry, including one day with dehumidifier running. This paint is very thick. I used a synthetic brush and it really dragged. I don't think it would be easy to apply with a roller. Having said that, using a 3" brush, (size of tin restricted use of larger brush) putting smallish amounts on it often, it did cover well without much spraying off the brush. Area was ceiling and top of wall, mostly light staining, about 3 square metres in all. I applied two generous coats and the manufacturer's info of coverage (9.8m per litre) is about right. Overpainted with Leyland Trade Super Leytex Matt emulsion, two coats, and that gave a perfect finish apart from one very small area where the staining was very dark. I gave that one extra coat each of the Zinseer and the emulsion and the result is perfect. Heads up. This is solvent based and the fumes are VERY strong. I had to open the doors to ventilate the room. Also, equipment must be cleaned with white spirit. It was recoatable after two hours, although I left the second coat overnight before applying emulsion. The 1 litre tin doesn't have a handle, so I stood it in a paint kettle to make it easier to handle. The Zinsser is expensive, but over decades I've had to deal with similar problems and this was the easiest and most effective method I've come across, so the trade off with price was worth it.

I’ve tried lots of different stain blocking products but this one is, by far, the best I’ve found. Their paint products in general are great and the white ones stay white for a long time. Does this particular paint smell ? Oh yeah, for sure, but not for so long that it’s a problem, does it cover stains ? Definitely and normally in one coat which can be a blessing when time is short. Can’t complain about any of the Zinsser products, but expensive but quality products carry a higher price I suppose.

Great product. It is undercoat so needs a top coat to get a good 'white' finish (as this is a little cream), but the coverage of stain quality is OUTSTANDING.

Arrived on time with no problems the paint is one of the best for covering damp and condensation stains especially for ceilings.

Good product used just over 3/4 of a litre with 2 coats to cover about a metre square area of coving/ceiling due a leaking valve upstairs. Tinted off white but whiter once dry but not a brilliant white so can still see outline edge until covered by emulsion. Yes it’s thick but has to be as it’s enamel oil based solvent paint and shells like nail varnish so your need plenty of ventilation otherwise it will give you a heavy head. Dries in about 2hrs or more depending on circumstances for a second coat or covering coat of emulsion etc…but although I recoated with stain block after 2hrs I left it 36-48hrs before covering with ceiling emulsion incase it drew the stain through again plus rule of thumb is if it still smells strong it isn’t fully cured ready to cover similar to using a oil based solvent gloss which usually smell for a week and then if you need to do another coat you can. I applied first coat with a brush as my ceilings are rough Artex and second with a gloss roller but if you have a flat ceiling or smooth wall finish then both coats with a roller which would be easier to apply and not use as much of the paint again depending on area and circumstances. All in all it does its job hopefully which time will not dealt tell.

Best primer over gloss paint I can find. Doesn't feel and perfect for base of water based top coat.

Works well to block stains, but the smell is very strong and lingers.

Despues de muchisimas busquedas me decidí por esta imprimación y queda genial!

Ich kann mich meinem Vorredner nur anschließen, auch bei mir kam die Dose sehr schlecht verpackt und stark verbeult an. Fraglich ist, ob man sie so problemlos öffnen und wieder verschließen kann. Sie kam zudem 4 Tage später als angekündigt.

Covered a soot stain with the first coat but added a second to be sure excellent stuff