Got some softwood with lots of knots which is going to be painted.
Knotting solution is expensive, but I have some Stain Block paint.
Anyone tried that on resinous knots? Would it work?
Knotting solution V Stain block
Nov 03, 2016
11 Replies
What I have done in the past on a white emulsioned ceiling (water stains/damage) is give a couple of coats of white gloss and then emulsioned and it appeared to work ok. So maybe a couple of coats of gloss on the knots before the undercoat may work. I used because thats all I had at hand.
I've paid more for a paint brush
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Cheapskate.
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It helps if you burn the resin off by judicious application of a blowlamp.
That might work - at least leaving some room for it. A lot of modern timber knots are absolutely soaking in fresh resin and will ooze the stuff through a paint surface no matter how much knotting compound you put on.
No, they dont. That's what knotting is for.
Knotting solution is essentially shellac. You may find this cheaper. I dunno
No you haven't.
Cheap until you look at the delivery charge. Nearly £10 for 125ml.
I have no other use for knotting.
Buy some from the BM then
Its just alcohol and shellac mainly.
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Oil based undercoat is just as good as stain block on ceilings - and is probably similar stuff.
But oil based paint on its own won't hide knots in wood. So I doubt that stain block would either.
I just use a hot air gun and boil as much of the resin out first.
It's only (normally) a problem on external south-facing timber.
Isn't knotting solution just shellac ?, in which case you can buy the powder and make up your own.
Is that still true with water-based paints post-VOC2010 though ?.
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