House Painter Forum

Professional Painters => Professional Painters and associated Trades Forum => Topic started by: Chip McCheckellson on April 22, 2007, 03:58:02 AM

Title: What happens if you paint over un-dried caulk?
Post by: Chip McCheckellson on April 22, 2007, 03:58:02 AM
My crew does it quite a bit. The boss is thorough about caulking, but we don't stop spraying to let caulk dry and we don't prime under it either. ???
Title: Re: What happens if you paint over un-dried caulk?
Post by: ProWallGuy on April 22, 2007, 08:11:38 AM
Most likely the paint will crack as the caulk dries and draws down tight.
Title: Re: What happens if you paint over un-dried caulk?
Post by: Chip McCheckellson on April 22, 2007, 02:03:45 PM
Wonderful... my boss has the theory that latex caulk and latex paint will just dry together.

Thanks,
Title: Re: What happens if you paint over un-dried caulk?
Post by: Lynjowoman on April 22, 2007, 05:03:51 PM
Chip
Tim is right. Also it you are brushing it will make a gooey mess & streak up the paint.

Lynjo
Title: Re: What happens if you paint over un-dried caulk?
Post by: Stever on April 22, 2007, 05:55:02 PM
The caulk will adhere fine without a prime first but, like they mentioned above me, you will see cracking in the painted surface if you paint before the caulk has had enough time to fully dry. The outer surface, the paint, will dry first and as the interior of the caulk bead sets it will shrink. The shrinking will force the paint to fold and crack.

They may both be a latex, or acrylic, but they are not the same formulation.
Title: Re: What happens if you paint over un-dried caulk?
Post by: Chip McCheckellson on April 23, 2007, 05:12:52 AM
Thanks gals and guys, my boss is a good guy, I think hes just a victim of bad information on this one.
Title: Re: What happens if you paint over un-dried caulk?
Post by: Vin on April 23, 2007, 09:33:15 AM
chip go back in a few days and see what you have, maybe a week would be better  ;)
Title: Re: What happens if you paint over un-dried caulk?
Post by: GreenMtnPainter on April 23, 2007, 07:11:00 PM
I'm SO guilty of this!  Usually only when I miss a spot on the first caulk go-around and find it while im painting. 

I don't want to promote any poor practices, but to be honest I almost never see any cracking once it all has dried as long as the joint you are caulking is relatively small, as it would be in most cases where siding meets a vertical trim board.    I definitely wouldnt do it on any crack wider than say, a credit card tho.
Title: Re: What happens if you paint over un-dried caulk?
Post by: Desy101 on October 30, 2017, 05:52:37 AM
For a very long time I was looking for information on this topic. Thanks to all!