Oct 6, 2007

How to treat drywall

This short article covers a few things worth mentioning about painting new drywall. The goal is to achieve the best uniform finish possible with flat, eggshell, satin and semi-gloss paints.

Generally flat wall paints do not require much drywall surface prep to make flat paint look good because they tend to hide imperfections. A drywall sealer is applied to achieve the best results with shiner paints. Sealers, opposed to wall primers, penetrate porous surfaces of drywall and seal the surface like no wall primer can.

Photo: GARDZ applied to new drywall with one coat of ICI Dulux 1410 Low Sheen eggshell paint. The photo was taken 2 hours after the wall was painted and it is almost every bit as wet when it was rolled. Another benefit to using Gardz is your finish paint adheres better. Gardz penetrates the surface of the drywall providing the best adhesion in comparison to using wall primers which typically dry on the surface of the paper with little penetration.
This photo is without GARDZ. Notice the dry patchy area where the drywall mud can be seen through one coat of ICI Dulux 1410 Low Sheen eggshell paint.

Here is a another example of wall paint applied without GARDZ drywall sealer. You would think a wall primer would allow you to achieve a uniform paint finish but that is generally not the case with wall primers.

GARDZ applied to new drywall will turn the drywall a darker grey. You should be aware, some paint colors will not cover the same over a dark grey such as pastel colors. You may want to test an area.

Last edited: February 22, 2012

10 comments:

Mike said...

I'm glad you're sharing your years of experimenting with us. Let me know if you have any wisdom about Behr Primers/searler. Tell me, We are using PREMIUM PLUS® P.V.A Drywall Primer & Sealer No. 73 on our new drywall and it dries very transparently. I am not very familiar

Mike said...

I'm glad you're sharing your years of experimenting with us. Let me know if you have any wisdom about Behr Primers/searler. Tell me, We are using PREMIUM PLUS® P.V.A Drywall Primer & Sealer No. 73 on our new drywall and it dries very transparently. I am not very familiar with sealing new drywall, so I do not know if the transparency is a problem for the sealer. After applying about 3 coats the wall becomes white, but this uses much more paint than Behr says is needed.
Do we really need all those coats or is 1 enough? Many thanks.

Xiz said...

Nice post. I HAVE noticed the flat areas where mud lies under the paint. We usually use semi here at work (apartment complex) and we prime with zinsser bullseye.

Sealer... sealer... not primer. I got it!

magnhild said...

Great info Re: GARDZ...

I have new drywall in a basement, should I use GARDZ only/and/or the ICI Gripper prime you recommend?? I will be using a BM Regal Eggshell paint in a dark tan. My only concern with reading the info: re Gardz was that it did not say mildew resistant like the bullseye OR kilz premium does? Any suggestions would be appreciated...

NOT A BANKER said...

Just want to report back on using zinsser's product. I used bulls eye on old outdoor cedar siding (2 months) the color looks great! and the new drywall with gardz works wonder! some of HD's paint is like...water so you'll have to becareful what to select as the top coat! very helpful informations.

cheers,

AllenR108 said...

So what do you recommend for pastel colors? When you say pastel colors do not cover the same do you mean that you have to use more coats to get the color you want with pastels if you use the guardz?

Jack Pauhl said...

Allen, Yes pastel colors typically require more coats over grey (sometimes going over off whites too).

Keep in mind, the use of Gardz is more often used for finishing darker bold colors that typically show off the drywall work.

Also there are paints that will cover in 2 coats. I simply posted that remark as a 'heads up' because I cant outline every paint out there and what they are capable of.

If the paint chip suggests the use of a tinted primer, you may want to apply it for the best results in achieving the truest color match.

AllenR108 said...

I don't know if my question got to you the first time I sent it so I'll ask it again. If the Guardz makes the drywall gray and it causes problems with coverage for pastel colors what does that mean? Does it mean you have to apply more coats of the pastel paint to get the color you want or does it mean that the Guardz should not be used with pastel colors? If the second is the case what would you use instead of Guardz? Thanks

AllenR108 said...

Thanks for your response Jack. I bought a 35 year old home that has several coats of paint on the walls and it's textured with a small orange peel type texture. What would you suggest as far as prepping and painting this type of surface? Thanks again for your help?

AllenR108 said...

Thanks for your response Jack. I bought a 35 year old home that has several coats of paint on the walls and it's textured with a small orange peel type texture. What would you suggest as far as prepping and painting this type of surface? Thanks again for your help?