Gloss Paint In Hot Weather

[Oleanda]

Does gloss paint take longer to dry in hot weather?

[bookbinder]

I think that it does, but not by much. It's not worth bothering about.

[Old_Geezer]

Doesn't heat dry things ?

[Canary42]

The danger in hot sun is the outer layer dries off first, leading to bubbling later.

[jambutty]

If it's outside, it will blister in very hot weather. I know because this happened to me once when I had the outside of my house painted.

[Oleanda]

No, this indoors, well away from sunshine, I painted on Friday morning and its nowhere near dry.

[Old_Geezer]

Something wrong with the paint ?
Did you leave chemicals on the prepared surface prior to painting ?

[Canary42]

It is a bit unusual, but I've known paint take that long, especially if it's fairly old. I don't know if hot weather makes a difference.

[Oleanda]

Its Dulux liquid gloss that I bought last year, used some of it then and it was fine. I wiped down the sanded woodwork with a white spirit- soaked cloth about an hour before painting. And, yes, I did stir the paint thoroughly.

[bookbinder]

For what it's worth, I use Johnstone's gloss paint when I want the paint to dry quickly, and I use Dulux One Coat when I'm not bothered about the drying time.
http://scinote.tumblr.com/post/97752180694/question-how-does-paint-dry-asked-by

[jambutty]

That does seem a long time Oleanda, I've never know that before.

[Maydup]

Its likely to be the high humidity thats affecting your paintwork. Here's what is said on the site of a well known paint supplier.

High humidity can interfere with the supply of oxygen necessary for the curing of alkyd paints and can delay the tack-free time from hours to days. With latex paints it is possible for the evaporation of water to be slowed as the paint dries. If the coalescing solvent (film forming glycol) evaporates before the water leaves the film, you will end up with a paint film that is weak or can crack and/or peel.

[Maydup]

A solution might be to cool the room if you can. Do you have any fans you could run in the room?

[gingejbee]

^^^Maydup...fans don't cool the air - they simply move the warm air about. The air only FEELS cooler to the body because of moisture evaporation from it's surface ( called "cooling by evaporation").
You need a proper (maybe mobile) air-conditioner to cool/dry the air in a room.

[Canary42]

Any luck yet Oleanda ?

Incidentally according to bookbinders' link, paint dries quicker in hot weather.

[EDDIE51]

When I worked in a pub I used to know some professional painters. If they were working outdoors they used to get laid off if the weather was too hot. That was to do with the drying of the paint . One hot day they told me they had been 'fly'd off' . There was a plague of small flies that were landing in the wet paint and getting stuck. Best excuse for going down the pub I ever heard.