No VOC Tackifier replaces aerosol sprays for adhering stencils to surfaces. It is safe for both the user and the environment and is archival safe. By brushing Tackifier on the back of stencils you can safely position your stencil tightly to a surface. Repositionable ?works over and over to keep paint, Pigment , and mediums from leaking under the stencil. Surface remains sticky for multiple uses. Dries clear.