Zinsser Cover Stain 1 Litre | Premium Exterior Wood Sealer | High-performance primer and sealer for interior and exterior use. Blocks stains and seals surfaces. 1L.

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

Very effective

Certainly covers up various stains. Used it on a water stain on the kitchen ceiling. Couple of coats just on the stain did the job & I didn't have to do the whole ceiling. Also used it to cover some knots in a wardrobe, which it also did well.Main point of purchase was as an undercoat for a garage door. Pretty thick so takes some good elbow grease to cover a large area. However, the subsequent coat of standard gloss then goes on easily.One note of caution. It stinks for ages! If using it inside, best do so when you can leave loads of windows open for a whole day (or more).Overall, good stuff though.

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.

After having water damage from a leaky roof I was left with brown patches on my ceiling that would not cover and was worried I was going to have to re plaster, but after being recommended this I thought I’d give it a go. IT WORKED! And with only one coat :) I’m a very happy lady and it’s saved me a fortune. There is only one down side and that it stinks, so please make sure your room is well ventilated with windows open and maybe breathing apparatus or you might end up seeing brown spots that aren’t there. I also recommend buying plenty of while spirit for the clean up after. 10/10 from me.

Although very thin it is brilliant

Having used a Zinsser stain block before for a water leak stain on the ceiling, I can honestly say that this one is the ONLY one to work on water stains.I did lots of research in tradesmen/DIY frequented store websites who all swear by this one. Having used their BIN123 product before, thinking all was well until a year or so later, the stain reappeared I didn’t want to repeat it. I gather the difference here is whether it’s water/oil based. This is oil based, which seems to make it harder to use but much more effective.Trust me on this; if you’re unsure whether to choose this or the BIN123 version, then I can tell you without doubt to go for this.I used a good quality brush for a patch & all along the joist lines that obviously soaked up the water then generously shared the wood stain to the ceiling below, so it was a fair size area.It took 2 coats with a 3rd small touch up on a really bad spot. It initially leaves a gloss type finish that seems hard to cover afterwards, despite using 2 coats of a good trade matte ceiling paint over it. I confess, I started to worry the shine would always show through in certain lights, but it eventually somehow settles with time (after the painting is done) & it’s now blended perfectly, so not understanding how/why is no longer more than a mild frustration/curiosity.As someone else said: do ventilate the room well, as this stuff is seriously strong. Also make sure you clean the brush meticulously afterwards as it’s not a quick/easy clean. Get as much excess paint off the brush as possible before soaking it in white spirit etc if you want to salvage your brush.This isn't totally painless to work with either, as it feels like it drags on the brush (akin to R.M’s red enamel paint) but I can honestly say it’s worth the money & does what it claims on the tin.

Covers well but be ready for the strong smell! Packaging was awful, the tins arrived bashed and dented, luckily they didn't leak.

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