Oil based undercoat as an exterior finish paint?

Can I use a quality oil based dark grey undercoat as a finish for exterior use? I like the dry colour and the sheen finish from this paint. Cheers.

13 Answers

Best to use primer first then exterior paint never use primer for final finish recipe for disaster
22nd Jul 2019
Helpful Answer? Vote Up thumb up + 22
Post your job & get responses from local painters & decorators. Read reviews before you decide to hire.
I'm looking for ...
If you use an exterior sealer on top - but it will require regular maintenance , as all external paintwork.
30th Jul 2019
Helpful Answer? Vote Up thumb up + 19
Style Decor
4 Reviews, 100% Positive
I personally wouldn't leave and exterior oil based undercoat exposed to the elements. Oil based paints provide several finishes, eggshell/satin/gloss
13th Aug 2019
Helpful Answer? Vote Up thumb up + 17
Bespoke R&R Works
1 Reviews, 100% Positive
Absolutely! Yes you can. Just ensure that substrate is well prepped, especially no residual emulsion paint underneath, and apply two coats. You can thin the 1st coat 5% with white spirits
13th Aug 2019
Helpful Answer? Vote Up thumb up + 15
Derek Dingwall Painter and Decorator
2 Reviews, 100% Positive
No it won't last ,there are eggshell type finishes available
17th Sep 2019
Helpful Answer? Vote Up thumb up + 11
Rbpdecor
0 Reviews
Hi i would not use an oil base undercoat as a finish if you want the look i would suggest using a satin wood in the finish of the undercoat.
9th Sep 2019
Helpful Answer? Vote Up thumb up + 10
Essential homes
0 Reviews
There is external undercoat on the market and at most diy stores I wouldn't advise using any internal paint outdoors.
5th Sep 2019
Helpful Answer? Vote Up thumb up + 9
AAA BUILDERS
3 Reviews, 100% Positive
you can but make sure it's exterior paint
15th Sep 2019
Helpful Answer? Vote Up thumb up + 9
Anthony mcdonough decorating
2 Reviews, 100% Positive
If you get
Exterior undercoat
Would be fine
But getting exterior paint
Mixed same coulor would be better
5th Oct 2019
Helpful Answer? Vote Up thumb up + 9
No reason why not, I'd.probably give it 2 coats just be on the safe side though
6th Oct 2019
Helpful Answer? Vote Up thumb up + 7
VKV DECOR LTD
1 Reviews, 100% Positive
Not recommended to use undercoat as a finish.
8th Nov 2019
Helpful Answer? Vote Up thumb up + 1
AdjAbuilder Ltd
1 Reviews, 100% Positive
The short answer is NO. And NO again.

Masonry paint and oil is NOT breathable. The paint companies will tell you it is, but the bottom line is that anything made with plastic is not breathable. You wouldn't take your house out for a run in a plastic mac would you? It sweats.

Wataerproof masonry paint is a bit of a problem as a concept. Counter intuitive maybe - but old houses need to breathe. If you slop any form of plastic onto an old building, it will not be able to breathe. That starts to cause huge problems with moisture retention in the building fabric. When that happens, your masonry paint, that you thought was breathable, starts to peel and flake. Why? Because water vapour pressure is pushing it off the wall. Precisely because it is acting like bubble gum. Blow hard enough, the bubble grows, and then bursts... pop. And so the masonry paint pops and blisters as moisture finally manages to get out.

The worst culprit by far is Sandtex masonry paint. We have seen this again and again - thick layers of Sandtex built up over years of painting an old house, until it forms a horrible thick plastic sheet. Eventually it is so thick that you can lift an edge and peel big sheets off it - sometimes water actually runs down behind the paint sheet. When peeled off, the sopping wet wall behind will gradually start to dry out. I've seen old solid walled houses with Sandtex masonry paint covering them that have taken 18 months to dry out when the Sandtex was removed. My advice - steer clear of ANY masonry paint.

If you want truly breathable external paint - there is only one thing to use is - Limewash. It's been used for hundreds of years, and it WORKS! It's a shelter coat
11th Nov 2019
Helpful Answer? Vote Up thumb up + 0
Undercoat paint is not for finish. That's why they called undercoat. It will be damaged very quickly if you don't put a gloss or any top coat.
18th Nov 2019
Helpful Answer? Vote Up thumb up + 0
Post your job & get responses from local painters & decorators. Read reviews before you decide to hire.

I'm looking for ...

How it Works

step1
Read reviews before you decide to hire.
See how it works