Repair Cracked Roof Box

Use a toothbrush or a fine toothed wire brush to remove any debris from the crack.
Repair cracked roof box. We lightly sanded down the area of the crack extending 6 8 all around. West systems epoxy makes a gflex kit specifically for plastic boat repair. Also look for pulled or missing nails at the base s bottom edge. In this video i repaired my thule cargo carrier box.
The other method is plastic welding which can be diy with the proper hot air welder or any body shop that has one. We repeated with a second layer using a slightly larger fiberglass patch. Initially in the late 1990s we would apply abs patches cut pieces of abs plastic attached by abs cement to the hole or cracked section of the box. A clean surface is vital as it will.
Cleaning the crack you must first clean the cracked area to ensure that the repair material will bond. There s really no fix other than replacing the damaged vents. Working on the inside of the box start by sanding the area around the break. It have several cracks a couple of holes and was in bad need of painting.
Wipe the area clean using alcohol wipes. We applied a layer of abs cement to the surface of the box laid down a layer of fiberglass and brushed more cement on until it was saturated. Roof boxes are generally made of abs. I used fiberglass kit auto b.
This would be a pretty good solution but ran the risk of coming apart after a couple of years. You might be tempted to throw caulk at the problem but that solution won t last long. Bought a new one to replace it for the owner but did a perfectly good repair with sikaflex on the cracked one which lasted perfectly well but wasn t. Our box repair methods have come a long way over the past decade or so.
Replace them with rubber washered screws. Check for cracked housings on plastic roof vents and broken seams on metal ones.