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Old 10-22-2013, 05:00 PM   #1
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Waterborne Satin Impervo Question


I really like working with this stuff on trim and have had great results, but it is a little tricky on doors, especially the inside of metal exterior doors (e.g. the common Therma Tru side door with glass panel). Zinn 123'd the door and put on first coat of WB Impervo. Not great coverage, but to be expected on a first coat. Had a few runs where I might have put it on a little heavy. No big deal. To avoid the runs, I put the paint on a little lighter, but I can still see thru it. I didn't dry brush it on by ANY means. Two coats should be sufficient IMO, but not in this case. Any pointers?

Using a 2.5" Chinex w/ angled sash, if that matters.

Edit: The 3rd coat wouldn't be a huge deal if there wasn't a SEVEN hour recoat time. Still, I want to be able to use this stuff in 2 coats in the future.

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Last edited by 7.62; 10-22-2013 at 05:19 PM.
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Old 10-22-2013, 05:34 PM   #2
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Waterborne Satin Impervo Question


IMO if speed is what you want, use Aura. If you want something that is very close to oil( actually is a waterborne oil..) use Advance.
WB Imp was the first attempt at a good WB trim paint. They have better now.

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Old 10-22-2013, 05:50 PM   #3
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Waterborne Satin Impervo Question


The trick to avoiding runs is not necessarily a thinner coat, but a more uniform coat. Paints that flow out well like the Impervo are prone to running because as they dry they 'flow' together. This is why brush strokes are minimized or eliminated because the paint levels itself out. During the leveling process if one area is heaver than an area next to it, a run will occur. It is easier to get a uniform coat if you apply thin, but then you deprive the paint of some of its leveling properties, and compromise coverage.

To get coverage your going to have to put on reasonably thick coats. Metal doors are tough. Pay attention to the places your getting runs. I would guess they are coming from the inside bottom corners of the panels. As you apply, try to brush out extra paint from the groves around the panels, or wherever your getting excessive build up that is causing the runs, while still putting on a reasonably thick coat.
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Old 10-22-2013, 07:14 PM   #4
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Waterborne Satin Impervo Question


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Originally Posted by Brushjockey View Post
IMO if speed is what you want, use Aura. If you want something that is very close to oil( actually is a waterborne oil..) use Advance.
WB Imp was the first attempt at a good WB trim paint. They have better now.
I don't need a super-fast recoat time or anything like that, just not a super long one. It's a preference, really. Advance yellows. It's out. Aura's price is outrageous...even with our discount at BM. I LIKE WB Impervo, I just don't want to have to do three coats.

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Originally Posted by Jmayspaint View Post
The trick to avoiding runs is not necessarily a thinner coat, but a more uniform coat. Paints that flow out well like the Impervo are prone to running because as they dry they 'flow' together. This is why brush strokes are minimized or eliminated because the paint levels itself out. During the leveling process if one area is heaver than an area next to it, a run will occur. It is easier to get a uniform coat if you apply thin, but then you deprive the paint of some of its leveling properties, and compromise coverage.

To get coverage your going to have to put on reasonably thick coats. Metal doors are tough. Pay attention to the places your getting runs. I would guess they are coming from the inside bottom corners of the panels. As you apply, try to brush out extra paint from the groves around the panels, or wherever your getting excessive build up that is causing the runs, while still putting on a reasonably thick coat.
Yeah, I love how this paint levels. What you said makes sense. I also noticed runs on the top of a door frame where I wasn't painting the underside (because the left side of the door NEVER gets opened). I didn't think I put it on heavily at all but I would say now that it ran because it had no "support" under it. There was one run at the corner of the window frame and the doorknob hole (where I THOUGHT I brushed out the excess paint), and another run where the hinge bracket goes over the door (the two very small pieces that guide the hinge into place upon installation). Just excess paint I didn't notice. On another door, there were runs on the outside of the window frame...probably because I brushed that separately with my brush going vertical.

Anyway, am I risking a curing problem if I put a follow up coat on in, say...4 hours after application? It's been three hours and was totally dry after one hour. I just want to be done with this door tonight if possible. Gotta do the exterior of it tomorrow. Thanks!
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Old 10-22-2013, 07:38 PM   #5
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Waterborne Satin Impervo Question


Putting a little air movement on it with a fan will speed the dry a lot.

All these paints take some practice to get the hang of them.
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Old 10-22-2013, 07:46 PM   #6
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Putting a little air movement on it with a fan will speed the dry a lot.

All these paints take some practice to get the hang of them.
Oh its totally dry. Dried in 1 hour. Can says drys in 2, recoat in 7...I'm sorry, EIGHT hours.

You got that right. We are painting a huge house now with Regal semigloss for the trim. HATE THAT CRAP. The other guy working with me on this house has been painting much longer than I have (25+ years) and he hates it too! Thick as molasses and doesn't cover worth a darn (second coat draaaaaags over the first, too). Thinning it with a bit of water helped but not that much. It DOES do well, however, on upward facing surfaces, like the tops of baseboards and the TOPS of railings.
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Old 10-23-2013, 12:11 AM   #7
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Waterborne Satin Impervo Question


Follow the manufacturer's directions. Re-coating too fast will cause curing problems which causes adhesion problems.The manufacturer knows best,believe me.

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