Perfect for WATERPROOFING your POP-TOP CANVAS or Sunbrella CAR COVER! Safe and effective on all synthetic fabrics, natural fabrics and blends. For polyesters, nylons, acrylics, olefins, cotton, wool, silk and natural leathers including suede. Will not change the feel, color, breathability or flammability of fabric. Non-toxic and non-flamable when the fabric has dried. Recommended for and by Sunbrella.