Repair Cracks and Holes in Fibreglass (1)

Posted by zccyfiberglass on May 11th, 2016

Repair Cracks and Holes in Fibreglass (1)

Here are seven steps you'll be able to follow to repair cracks and holes in fibreglass.

Step 1: Materials and Tools

DISCLAIMER: operating with fibreglass is rough. it's nasty stuff, and might get into your skin, your lungs, and your eyes. once working with these materials it's necessary to wear a respirator, gloves, and safety glasses. it's suggested that you just wear a paint suit to hide all skin that would be exposed to fibreglass particulate.


Fiberglass Chopped Strand Mat

Fiberglass Flake

Bonding resin

Resin Catalyst

Magic Sculpt Polyester Puddy Resin/Hardener kit

Mineral Spirits for cleansing excess

Mixing container (Be certain to get one with the volume measurements on the facet of the container for simple mixing)


Small Disposable brush

Angle Grinder with Grinding Disc

Orbital sander with eighty Grit Disc

Odds and Ends:

Stir Sticks



Safety Glasses

Permanent Marker

Duct Tape


Step 2: Surface Preparation

We went through and known all of the holes that we wanted to patch, and most of them were on vertical surfaces. With the permanent marker, we have a tendency to circled around an inch round the perimeter of every hole and crack. Then, applying the angle grinder with a better grinding wheel, we need ground down the surface to taper from thick to thin.

The edge of the outlet ought to be a pointy edge, with a taper moving outward back to the traditional shell thickness.

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