The scratch patch lets you make easy, permanent, color-matched repairs on hairline cracks, small scratches, and chips in your gel coat without sanding or using a catalyst. Repair fiberglass boats, vehicles, bathtubs, shower stalls, and hot tubs. Works on any gel-coated surface. Clear hides scratches on most dark colors. Just clean surface, apply, smooth with plastic tool included, let semi-dry, and then remove excess. After final drying, wax to smooth into surrounding area. Color mistakes can be removed with mineral spirits. Includes 1/2-oz. liquid patch material, applicator, and instructions.