Why should walls be primed before hanging a wallcovering?
Plaster is a porous material which, when untreated, will absorb any liquid substance that is applied to it. This means that when applying a substance such as wallpaper paste, a primer needs to be applied first in order to seal the surface and prevent this absorption. In everyday domestic decorating, we would normally apply ‘sizing’ - a thinned down wheat paste made from flour. However, almost all new buildings use paper-faced gypsum board called ‘drywall’ or ‘plasterboard’. The soft, absorbent paper facing on this board needs more than just a coat of flour paste to protect it from the extended soak time resulting from the application of wet wallpaper. Drywall needs a barrier coating to shield it from the wallpaper paste when the new paper is hung. This barrier is only achieved by priming or sealing the surface.
What about painted walls?
Wallpaper doesn’t stick to your wall, it sticks to the paint on your wall. In most cases, the paint on your wall is some form of emulsion paint. Ordinary interior emulsion paints do not provide a suitable surface on which to install a wall covering, therefore painted walls require priming prior to installation.There are a number of reasons for this, the main ones being that emulsion paint is commonly in contact with the wet wallpaper paste for a day or longer during the drying process. During this time, the emulsion loses its integrity and softens into a rubbery film. This softening can cause significant problems with the wall covering because it requires a sound, solid surface on which to hang. Furthermore, in some cases emulsion paints can be very porous and can allow paste to be absorbed into the paper facing of your plasterboard, making any subsequent removal of the installation very difficult.
SILVER BULLET_Large Format Pro Primer
We have designed our primer specifically with the above in mind.
Silver Bullet prevents softening of the emulsion paint on your walls,
providing a stable and solid surface on which to hang the wall covering.
When it comes to drywall, not only does Silver Bullet form a solid coating on the paper , but it also blocks and seals out anything that may come through the existing paint to damage your new paper—for example, old paste from earlier wallpaper installations that can work into delicate wallpapers, damaging them.
This quick drying, one coat solution will ensure a trouble free, high-quality finish with a wall covering that adheres firmly to the surface and has seams that remain secure and stable. It also means that when the time comes to remove the installation, minimal damage to the wall is incurred.