oak stain

Surface prep. Cleaning, Sanding, etc.
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oak stain

Post by gonzo1690 » Wed Feb 27, 2019 10:46 pm

hi hope someone can help i have hardwood oak doors exterior which i have sanded to the bare and i’m using sikkens base coat but the doors are showing black staining
is there any other solid primers aye can use to bring them back to a solid oak finish
any help be great

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Re: oak stain

Post by Colin » Wed Feb 27, 2019 11:44 pm

Usually black stains appear in oak when it gets wet. The tannins react with any iron compounds(?!) in the wood turning it black.
So Sikkens HLS, being oil based shouldn't have caused this. Maybe the stains were there already, and the Sikkens made them more prominent?
Only way is to sand it off when it's dry and do it again. There shouldn't be any problem with HLS.

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