Recommend stain blocker

[TNDU]

I had a leak in the bathroom through the ceiling and onto the wall. I want to paint over it when it is fully dry.

I am selling the property so want to paint over the stains. The wall and ceiling is actually concrete!

Can anyone recommend a cheap but good stain blocker please?

Thanks

 

[opps]

The cheapest might be an oil based undercoat (if you have some). The downside is you might need to leave it for a couple of days before overpainting. Do it too soon, and you may get fisheyes- small puddles in the emulsion where the solvent in the undercoat pushes the emulsion away.

 

[TNDU]

The cheapest might be an oil based undercoat (if you have some). The downside is you might need to leave it for a couple of days before overpainting. Do it too soon, and you may get fisheyes- small puddles in the emulsion where the solvent in the undercoat pushes the emulsion away.

Will look for that. There is no hurry, so I can do the undercoat and then leave it for a couple of weeks even before I paint over the top of it.

As it is concrete, I may need a few layers.

 

[opps]

Will look for that. There is no hurry, so I can do the undercoat and then leave it for a couple of weeks even before I paint over the top of it.

As it is concrete, I may need a few layers.

I omitted to mention that you will then need to clean the brush. As a professional decorator, I have special brush storage units which mean that I only clean my oil based brushes when they get dirty. You will either need a throw away brush or pay for brush cleaner.

You should only need one, possibly two coats of the oil based undercoat.

It is only the cheapest option if you already have access to some (from a friend/etc).

I always have white oil based undercoat in stock. If you have to buy a tin, you may well not use the rest, thereby making it more expensive.

Toolstation sell small tins of the waterbased zinsser cover stain for about £11. You won't need to pay for brush cleaner

Zinsser Cover Stain Primer Paint

Don't let any time go to waste when you're decorating indoor or outdoor surfaces. If you use this Zinsser Cover Stain primer-sealer, your new wood trim can be primed, sanded and top-coated all on the same day.Cover Stain will be touch-dry in 35 minutes, and recoatable in two hours - this...

www.toolstation.com

The 500ml tin would be enough to apply 2 coats to an area bigger than a door.

 

[TNDU]

I omitted to mention that you will then need to clean the brush. As a professional decorator, I have special brush storage units which mean that I only clean my oil based brushes when they get dirty. You will either need a throw away brush or pay for brush cleaner.

You should only need one, possibly two coats of the oil based undercoat.

It is only the cheapest option if you already have access to some (from a friend/etc).

I always have white oil based undercoat in stock. If you have to buy a tin, you may well not use the rest, thereby making it more expensive.

Toolstation sell small tins of the waterbased zinsser cover stain for about £11. You won't need to pay for brush cleaner

Zinsser Cover Stain Primer Paint

Don't let any time go to waste when you're decorating indoor or outdoor surfaces. If you use this Zinsser Cover Stain primer-sealer, your new wood trim can be primed, sanded and top-coated all on the same day.Cover Stain will be touch-dry in 35 minutes, and recoatable in two hours - this...

www.toolstation.com

The 500ml tin would be enough to apply 2 coats to an area bigger than a door.

yeah, i saw that product at toolstation and it will work fine for what i need.

i was thinking as unsually, the wall and ceilings are concrete instead of the normal plaster, does it still require the stain blocker?

i don't have oil based undercoat unfortunately, only water based, so that is no good. but as the surfaces are concrete, i wonder if masonry paint would act as a stain blocker instead as they tend to be tougher paint. so i could just use masonry paint, which i already have as an undercoat?

 

[opps]

yeah, i saw that product at toolstation and it will work fine for what i need.

i was thinking as unsually, the wall and ceilings are concrete instead of the normal plaster, does it still require the stain blocker?

i don't have oil based undercoat unfortunately, only water based, so that is no good. but as the surfaces are concrete, i wonder if masonry paint would act as a stain blocker instead as they tend to be tougher paint. so i could just use masonry paint, which i already have as an undercoat?

I am inclined to guess that waterbased masonry paint is likely to let the water stains leech through. That said, I can only recall seeing it let rust stains leech through (weeks down the line). Given that you are not in a rush, why not try the masonry paint and see how you get on?

 

[TNDU]

I am inclined to guess that waterbased masonry paint is likely to let the water stains leech through. That said, I can only recall seeing it let rust stains leech through (weeks down the line). Given that you are not in a rush, why not try the masonry paint and see how you get on?

this is the one i have. it is gloss finish so i think it will be oil based rather than water based.

Ronseal Self Cleaning Smooth Masonry Paint All Weather 15 Years Protection 5L - Warm White

Ronseal's Self-Cleaning Smooth Masonry Paint in Warm White is a high-performance exterior paint designed to provide exceptional protection and maintain a pristine appearance for your home's masonry surfaces. Its advanced formulation ensures durability and ease of maintenance, making it an ideal...

www.diy.com

 

[opps]

this is the one i have. it is gloss finish so i think it will be oil based rather than water based.

Ronseal Self Cleaning Smooth Masonry Paint All Weather 15 Years Protection 5L - Warm White

Ronseal's Self-Cleaning Smooth Masonry Paint in Warm White is a high-performance exterior paint designed to provide exceptional protection and maintain a pristine appearance for your home's masonry surfaces. Its advanced formulation ensures durability and ease of maintenance, making it an ideal...

www.diy.com

That is waterbased, but you will lose nothing by trying it.

 

[JohnD]

You say you're selling the property.

The price of a can of paint will be a negligible proportion of the transaction.

You could even afford a bottle of brush cleaner.

 

[Wayners]

Zinsser BIN is best for water stains

 

[TNDU]

You say you're selling the property.

The price of a can of paint will be a negligible proportion of the transaction.

You could even afford a bottle of brush cleaner.

Very true, but I am tight and if it is something that I already have that will do the trick, then that will be better.

The property will be fully refurbised as it is sold with need of refurbishment, so this is just to make it less of an eye sore when people come to view as the rest of the bathroom is aready in a bit of a state and it needs to be replaced to be honest. So in a way, it is just temporary.