Ask The Trades - Print Page

Ask The Trades
https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Painting, Decorating & Tiling Questions >> Oil-based paint over water-based primer? https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1463702350 Message started by Zac on May 20^th, 2016, 12:59am

Title: Oil-based paint over water-based primer?
Post by Zac on May 20^th, 2016, 12:59am

I renewed some exterior woodwork, which I am going to paint with oil-based paint. I first primed the wood with a B&Q primer which was erroneously described as "solvent based" on their website. When I came to clean the paint brush I realized the primer was water based. Can I use oil-based paint over this primer as this is the same paint that I've used on the surrounding woodwork which didn't need renewing? Thanks for any advice on this.

Title: Re: Oil-based paint over water-based primer?
Post by woodsmith on May 20^th, 2016, 7:08am

You should be fine putting oil based onto a water based primer, it's the other pay round, putting a water based finish on top of oil based paint, that can cause a problem. If in doubt try a small area or get a scrap of timber and paint that first. I would give it a light sand first to create a key and then don't apply the paint too thickly, better to put on 3 thin coats than 2 thick ones.