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+-- Thread: Latex paint over shellac (/showthread.php?tid=7346685)
Latex paint over shellac - geraldonj - 02-26-2019
I want to paint raw wood with latex paint. Can I use regular shellac as a sealer or must I use dewaxed shellac?
RE: Latex paint over shellac - fredhargis - 02-26-2019
The safe bet is to use dewaxed. In today's market "latex" paint can mean a lot of different things....but it's almost certainly to be a water based paint....so the dewaxed will give you some comfort.
RE: Latex paint over shellac - rschissler - 02-27-2019
Since it is to be painted, you might want to use Zinser BIN shellac based primer.
RE: Latex paint over shellac - jteneyck - 02-27-2019
(02-27-2019, 10:15 AM)rschissler Wrote: Since it is to be painted, you might want to use Zinser BIN shellac based primer.
+1. You'll get a smoother substrate and need fewer coats of paint if you use the BIN pigmented shellac based primer first.
John
RE: Latex paint over shellac - geraldonj - 02-27-2019
(02-27-2019, 01:09 PM)jteneyck Wrote: +1. You'll get a smoother substrate and need fewer coats of paint if you use the BIN pigmented shellac based primer first.
John
Thank you all for your advice.
RE: Latex paint over shellac - Cooler - 02-28-2019
I recently had an issue spraying acrylic (PPG's Breakthrough) over Sealcoat. It turns out that I have to wait 24 hours to coat over the shellac to make sure 100% of the alcohol has evaporated.
For other finishes, I can coat over Sealcoat and BIN primer in just one hour.
RE: Latex paint over shellac - jteneyck - 02-28-2019
(02-28-2019, 08:30 AM)Cooler Wrote: I recently had an issue spraying acrylic (PPG's Breakthrough) over Sealcoat. It turns out that I have to wait 24 hours to coat over the shellac to make sure 100% of the alcohol has evaporated.
For other finishes, I can coat over Sealcoat and BIN primer in just one hour.
This is why it's a good thing to stick with one manufacturer for all the products needed for the job - stain, sealer, topcoat, etc. And when you decide to go rogue, as I often do, it's critical to do tests to confirm everything works together. I once thought of putting EnduroVar over GF's PreCat lacquer to improve the chemical durability. Testing showed that would have been a really bad idea; it peeled off with my fingernail.
John
RE: Latex paint over shellac - Cooler - 02-28-2019
(02-28-2019, 10:31 AM)jteneyck Wrote: This is why it's a good thing to stick with one manufacturer for all the products needed for the job - stain, sealer, topcoat, etc. And when you decide to go rogue, as I often do, it's critical to do tests to confirm everything works together. I once thought of putting EnduroVar over GF's PreCat lacquer to improve the chemical durability. Testing showed that would have been a really bad idea; it peeled off with my fingernail.I always considered shellac (and pigmented shellac) to be a universal primer. And it is, if I wait long enough for the shellac to outgas.
John
I've had my primer tinted to a color matching the final color. Not so important nowadays, but it saved one coat of color back then. Nowadays the one-coat coverage is much better (but I always put down two coats anyhow).