On 12/01/11 09:25 am, Norminn wrote:

I had read that new drywall needs to be primed/sealed before trying to
apply wallpaper; "Shieldz" was mentioned specifically, so I bought a
qt.
can of clear Shieldz (it's a small area). After applying one coat I
checked online to see how long I should wait before applying the paper,
only to find that they say that for use over mudded drywall I should
use
the white Shieldz -- but although it's made in quart cans nobody sells
it in quart cans.

Is there a good substitute that might be available in quart cans?

Is there a chemical difference between clear and white other than
pigment? The recommendation to use white might be to give a certain
"backdrop" for those wallpapers that you can see through a ittlle.

The MSDS sheets show considerably different ingredients:

White:
Calcium Carbonate
Ethylene Glycol
Limestone
Talc
Titanium Dioxide
Zinc Oxide

Clear:
Magnesium Silicate
Crystalline Silica
Magnesium Chloride

Perce

Forget the CHEMISTRY...their website has TDS (Technical Data Sheets)
that give all the specs you need to know, he
http://www.rustoleumibg.com/images/t...eldz_Clear.pdf

But from that document:

"On drywall that has been skimcoated with drywall mud or spackling
compound apply 2 coats of SHIELDZ WHITE."

Perce