What is the difference between primer and sizing? Why do I need to use it?
Primer is a protectant/sealer for your wall which prevents the paste from absorbing into porous surfaces, and allows the paste to grip on slick surfaces. Sizing provides additional grip for better adherence and more slip for ease of sliding each strip into position on the wall. Many products on the market today are a combination sealer/sizer; these one-step universal wallcovering primers are easier to use and are formulated to work on a variety of surfaces under varying conditions. Sealing the surface is also an important procedure to allow for future removal.
