CarGroom Short-Strand Fiberglass Reinforced Body Filler (Quart)

Standard plastic body filler works for minor dents and surface imperfections, but when you are filling holes, rust-throughs, or tears in sheet metal or fiberglass panels, you need something with more structural strength. CarGroom Short-Strand Fiberglass Reinforced Body Filler by US Chemicals is built for those tougher repair jobs.

The short fiberglass strands mixed into the filler provide reinforcement that bridges gaps and holds together over areas where standard filler would crack or fall out. This makes it the right choice for moderate body repairs where the substrate has actual damage rather than just surface dings. It works on both metal and fiberglass surfaces, so it covers automotive body panels as well as fiberglass boat hulls, RV panels, or other fiberglass structures that need patching.

Each quart can comes with a 1-ounce tube of cream hardener for mixing. The filler mixes and sands easily compared to long-strand fiberglass fillers, which can be more difficult to shape and feather out smoothly. For deep repairs, apply in layers, letting each one cure before adding the next. The cured filler is waterproof and rustproof, so the repair holds up to moisture exposure.