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How to Repair a Fiberglass Swimming Pool

by
author image Emily Beach
Emily Beach works in the commercial construction industry in Maryland. She received her LEED accreditation from the U.S. Green Building Council in 2008 and is in the process of working towards an Architectural Hardware Consultant certification from the Door and Hardware Institute. She received a bachelor's degree in economics and management from Goucher College in Towson, Maryland.
How to Repair a Fiberglass Swimming Pool
An in-ground fiberglass swimming pool. Photo Credit Comstock/Stockbyte/Getty Images

Fiberglass pools offer a high level of strength and durability, as well as flexible design options to fit the needs of different applications. Over time, your fiberglass pool may develop small cracks or other signs of damage due to poor installation, shifts in the terrain or simple wear and tear. Instead of hiring a contractor to repair your pool, fix yourself using a fiberglass repair kit and a few simple tools.

Step 1

Drain the pool so the water level is below the crack. Effective fiberglass repair requires a clean, dry surface.

Step 2

Sand the crack and surrounding area using a small hand sander or a piece of medium-grit sandpaper. Smooth away any bumps or raised sections around the crack and remove loose pieces of fiberglass.

Step 3

Put on your safety glasses. Cut along the length of the crack using a saw with a diamond blade. Extend the cut a few inches beyond the length of the crack or either end.

Step 4

Apply a coat of epoxy bonding agent from your repair kit to the crack using a small paint brush. Be sure to fill the inside of the crack so the epoxy extends as far into the void as you can reach.

Step 5

Mix the putty or filler according to the instructions on the fiberglass repair kit packaging. Fill the entire cracked area with putty, then smooth out the surface and remove excess filler using a putty knife. Allow the putty to dry completely before proceeding.

Step 6

Create a border around the crack using tape. Make sure the tape surrounds the entire damaged area.

Step 7

Paint the area inside the crack using the gel coat from your fiberglass repair kit. Immediately cover the gel coat with a sheet of fiberglass cloth so that the cloth extends 2-inches in each direction beyond the cracked section.

Step 8

Paint over the fiberglass fabric using a second coat of gel from the repair kit. Press out any bubbles or air pockets beneath the fabric using your paint brush or a putty knife.

Step 9

Wait for the patched area to dry completely, then sand it smooth so it blends in with the surrounding surface. Paint the repaired area using an epoxy gel paint to create the desired finish.

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