Repair Cracked Roof Box

Check for cracked housings on plastic roof vents and broken seams on metal ones.

Repair cracked roof box. Roof boxes are generally made of abs. This would be a pretty good solution but ran the risk of coming apart after a couple of years. Replace them with rubber washered screws. The other method is plastic welding which can be diy with the proper hot air welder or any body shop that has one.

A clean surface is vital as it will. Also look for pulled or missing nails at the base s bottom edge. There s really no fix other than replacing the damaged vents. Wipe the area clean using alcohol wipes.

Will work on your box too. 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. I used fiberglass kit auto b. It have several cracks a couple of holes and was in bad need of painting.

Use a toothbrush or a fine toothed wire brush to remove any debris from the crack. Our box repair methods have come a long way over the past decade or so. 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.

Working on the inside of the box start by sanding the area around the break. West systems epoxy makes a gflex kit specifically for plastic boat repair. We lightly sanded down the area of the crack extending 6 8 all around. Cleaning the crack you must first clean the cracked area to ensure that the repair material will bond.

You might be tempted to throw caulk at the problem but that solution won t last long. In this video i repaired my thule cargo carrier box.