Clear varnish

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Simpo Two

Original Poster:

89,150 posts

280 months

Sunday 30th March
quotequote all
I have a small piece of very nice elm that needs to be sealed, and I'd like to keep it in its natural colour. The problem is that the grain is very porous in some places so anything with colour in gets absorbed and darkens the wood.

A professional joiner recommended Dulux Diamond Glaze but £30 is a lot for an area little more than a square foot. Any recommendations for a clear satin varnish please?

wolfracesonic

8,246 posts

142 months

Sunday 30th March
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I’m assuming it’s planed timber ? If yes, consider a grain filler.


DonkeyApple

62,966 posts

184 months

Sunday 30th March
quotequote all
Simpo Two said:
I have a small piece of very nice elm that needs to be sealed, and I'd like to keep it in its natural colour. The problem is that the grain is very porous in some places so anything with colour in gets absorbed and darkens the wood.

A professional joiner recommended Dulux Diamond Glaze but £30 is a lot for an area little more than a square foot. Any recommendations for a clear satin varnish please?
Indoor or out?

If indoor then shellac might be best. Dampen the wood to raise the grain and sand down, then a light coat of shellac to seal, sand again and then add coats as desired.

Whatever you use I would think the key may be to seal first with a light or diluted coat?

OutInTheShed

11,527 posts

41 months

Sunday 30th March
quotequote all
The best varnish for not changing the colour of things IMHO is International Perfection 2 pack.

But that's about £60 a tin.

But even a gin-clear varnish will change the look of the wood, just as sanding some dark paint matt makes it look a lighter colour.

Many of the waterbased varnishes have a slight purple tint in the can and give a good finish.
There are clear resins you could use. I've not gone down this route for a long time though.

Rattle can clear acryllic?

OutInTheShed

11,527 posts

41 months

Sunday 30th March
quotequote all
Or just put a piece of glass over the top!
:-)

Simpo Two

Original Poster:

89,150 posts

280 months

Sunday 30th March
quotequote all
wolfracesonic said:
I’m assuming it’s planed timber ? If yes, consider a grain filler.
It's planed (by me) and sanded. The pro suggested grain filler, but applied after the first coat so you know what colour the wood goes to avoid any nasty surprises if it changes.

DonkeyApple said:
Indoor or out?

If indoor then shellac might be best. Dampen the wood to raise the grain and sand down, then a light coat of shellac to seal, sand again and then add coats as desired.

Whatever you use I would think the key may be to seal first with a light or diluted coat?
Indoors. I happened to use shellac recently on a theatre set; it seemed rather dark. It's part of the French polish scene which is rather specialist so perhaps best avoided for now.

OutInTheShed said:
The best varnish for not changing the colour of things IMHO is International Perfection 2 pack.

But that's about £60 a tin.

But even a gin-clear varnish will change the look of the wood, just as sanding some dark paint matt makes it look a lighter colour.

Many of the waterbased varnishes have a slight purple tint in the can and give a good finish.
There are clear resins you could use. I've not gone down this route for a long time though.

Rattle can clear acryllic?
I think the porosity of the grain - think slightly rough to the touch even after sanding - will need a thicker treatment that aerosol. I've done a test on the underneath with some Ronseal interior gloss varnish I had lying about - as you say mauve in the tin and it seems good with the colour. I might get the satin version if nothing else better comes along.

Glass wouldn't give the natural look I'm after.

So currently it looks like Ronseal but in satin, and maybe with grain filler...

wolfracesonic

8,246 posts

142 months

Sunday 30th March
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Have a look at Osmo Raw oil for an ‘invisible finish.

dave123456

3,437 posts

162 months

Sunday 30th March
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For the area you are talking about it may be worth seeing if you can get a tester pot of something.

OutInTheShed

11,527 posts

41 months

Sunday 30th March
quotequote all
I'd be tempted to try some of the 'crystal clear' epoxy which can be had from about £10 for 250ml on ebay..
Perhaps with a coat of clear satin for the final finish?

x404

62 posts

154 months

Monday 31st March
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I used Ronseal Interior Varnish, Satin Clear "with Diamond Hard protection" on our oak stairs and doors, and it didn't change the colour of the wood in any real noticable way - which is exactly what I wanted. Two coats with very light sanding between and it's left an excellent finish (8 to 10 years in and still looking good as new). Used indoors obviously.

Simpo Two

Original Poster:

89,150 posts

280 months

Monday 31st March
quotequote all
Thanks; good to hear as that's the satin version of one I tried (the mauve kind). Seems the best option so far even though water-based varnishes seem 'wrong' to me.

My tabletop top won't get walked on so it's the quality of the finish more than being 'diamond hard' than counts.


Lotobear

8,003 posts

143 months

Monday 31st March
quotequote all
Rustins Clear Plastic Coating is excellent stuff - you can buy a small kit for aorund £15.

Good enough for Brian May's first guitar build.

And I did my last Elan dash with it and it came up an absolute treat.

You can build it up thick, flat it back and then burnish to a mirror finish (satin if you like). It's like a piece of glass over your item and very hardwearing