How To Use Bondo Glass, Interior or exterior use Make Repairs to fiberglass, metal, wood, concrete, and masonry Fill small holes up to ½-inch wide with fiberglass reinforced formula without the need for backing strips, fiberglass cloth, or mat Stronger bonding formula compared to Bondo® Original Filler Waterproof and non-shrinking formula works on cars and boats Sep 25, 2025 · How To Use Bondo Correctly Knowing which Bondo product to use and when to use it is only half the battle. Clean the application surface with warm, soapy water using a sponge. Bondo Fiberglass Resin is a strong material commonly used for autos, boat building and other repairs. All-Purpose Fiberglass Resin Use for bridging large, gap-ing holes, breaks or cracks in fiberglass boats, tubs or pools. You also need to know how to use Bondo properly if you want to achieve the desired results. Follow the steps below to use Bondo for fiberglass. I want to share some basic with you about how to use, apply, and make sure your repair is the best it can be!!! Bondo is an automotive body filler, often used for car and household repairs. Should be used with fiber-glass cloth tape or matting (see Accessories, below). Aug 20, 2023 · Applying Bondo glass fiberglass filler. Before you begin applying Bondo, make sure to sand down the paint, replace Feb 2, 2020 · If you absolutely must use body filler to make the repair, then you should remove all the rust scale, add a backup screen to cover the holes from the back side, then use Bondo Bondo-Glass over the rusted area, sand and finish out with regular Bondo body filler for a stronger repair. j9, va, 5qmp, bbvrvu, vlhi6, cwv, eb, orr6huds, ym7ij, 2jyp0p,