Stain blocking question

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flyingguy
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Stain blocking question

Post by flyingguy » Tue May 08, 2018 11:18 am

Hi all, hoping someone can help me.

A few years ago I redecorated my flat, all in brilliant white. There were a couple of marks on the wall that required stain blocker, so I bought a tin of white stain blocker, then painted over it with emulsion. It blocks the stain, however in certain lights you can see a difference in the texture. Could it be because the stain blocker is white, and the emulsion was brilliant white, or that the SB has a matt finish and we used satin for the BW paint? I discovered some mould spores on the wall behind our bed which I was able to clean up, and having the area treated, however I will need to repaint that wall to deal with the stains.

Many thanks!
Desmondo15
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Re: Stain blocking question

Post by Desmondo15 » Tue May 08, 2018 1:34 pm

Which Stainblock?

How did you apply it?

How did you apply the emulsion and how many coats?

If you applied the stain block by brush for example and the rest of the wall had been rollered you may be seeing a difference in texture.

If you've only done one emulsion on top then it can still grin through.

I'd sand lightly the Stain block area apply 2 coats of emulsion to it then re do the whole wall.

This should make it all uniform.

Don't sand to hard as the stain block needs to remain unpierced.
flyingguy
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Re: Stain blocking question

Post by flyingguy » Tue May 08, 2018 1:37 pm

Desmondo15 wrote:Which Stainblock?

How did you apply it?

How did you apply the emulsion and how many coats?

If you applied the stain block by brush for example and the rest of the wall had been rollered you may be seeing a difference in texture.

If you've only done one emulsion on top then it can still grin through.

I'd sand lightly the Stain block area apply 2 coats of emulsion to it then re do the whole wall.

This should make it all uniform.

Don't sand to hard as the stain block needs to remain unpierced.
It's a wickes stainblock, can't remember the exact one. Says it's for walls etc. I think I applied one coat with a small roller, and then 2 coats of emulsion. I might try sanding it after and see if that makes a difference. Does the white/brilliant white make a difference?
Desmondo15
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Re: Stain blocking question

Post by Desmondo15 » Tue May 08, 2018 3:16 pm

Shouldn't do as your covering everything.

A picture would help.

Might need a better emulsion, possibly.
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