What is peel ply?
Peel ply material is a woven dacron (rayon) cloth. It is available from many sources including Aircraft Spruce Welcome to the Aircraft Spruce Web Site! and costs about $3.56 yd x 66″ width. The favorite choice of many builders is the 2.7oz weight. I prefer to buy the 66″ width and cut my own tapes and sizes for each particular use. It is much cheaper this way and allows great versatility in its use. The peel ply material is generally used to allow the builder to have a “re-bondable” surface which requires no additional preparation once the peel ply is removed. That is very important, however, the peel ply serves other important functions as well. When applied over the wet lay-ups, you have a surface that will allow 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. The resin surface normally will not totally cure when
