Peel Ply is a woven dacron (rayon) cloth. Peel Ply is generally used to allow the builder to have a "re-bondable" surface which requires no additional preparation once the peel ply is removed. Peel ply also serves other important functions as well. When applied over wet lay-ups, peel ply allows you to squeegee trapped air out without allowing the glass layers to move and shift around. When the resin/fiberglass layup is cured and the peel ply is removed, the surface will be free of harmful sharp edges and spurs.
Resin surfaces normally will not totally cure when exposed to air which acts as an inhibitor. Peel ply helps seal the surface and allow the resin to thoroughly cure. This complete curing of the resin surface is very important. Later when sanding or grinding the surface, the "sticky stuff" will not be there to clog up sandpaper with uncured resin.
This Red Stripe Peel ply is 1000mm wide.
NOTE: if the surface is sticky because the resin was applied without peel ply, wash the surface with a clean rag soaked with acetone. The acetone will remove any uncured resin and allow clog free sanding.