In an Acrylic Spa

Jacuzzi Hot tub crack repair

A dip in the hot tub may help relieve the stress that builds through the day, but a small crack in the surface of your fiberglass hot tub can allow the water to slowly seep from the tub and reduce its enjoyment valve. Over time, a small crack can increase in size and cause irreparable damage. Fixing a crack in the fiberglass can stop the crack from spreading and extend the life of your hot tub.

Drain the hot tub to expose the crack in the fiberglass. Turn off the breaker to the hot tub.

Protect your hands with vinyl gloves, and your eyes with goggles. Wear a respirator to avoid breathing in fiberglass dust and any fumes emitted by the repair product.

Install a 1/16-inch drill bit into a cordless drill. Drill a small hole through the fiberglass at the tip of the crack where it starts, and drill another hole at the tip of the crack where it ends to keep the crack from spreading.

Insert a grinding bit into a cordless rotary drill. Use the tool to create a "V" shape in the fiberglass along the crack, increasing the crack depth to at least 1/16 inch, but no deeper than 3/16 inch.

Wipe the surface of the hot tub along the crack with a soft cloth or paper towel. Sand the fiberglass tub’s surface with 400-grit sandpaper to smooth the area around the crack.

Place a small amount of acetone on a soft cloth. Wipe the prepared crack with the acetone to remove any dust and debris from the grinding and sanding.

Pour the paste and activator from a fiberglass tub repair kit into a small disposable container. Use the correct amount of repair products suggested by the manufacturer, and mix them together with a wooden craft stick.

Apply the mixture to the crack with a clean craft stick. Use the stick to push the fiberglass repair product into the crack, slightly overfilling the crack to allow for shrinkage.

Allow the repair product to dry for at least one hour or until the product becomes hard to the touch. Sand the dried product with 400-grit sandpaper to smooth the dried product.

Apply the rubbing compound that comes with the repair kit to the sanded surface of the hot tub. Use a buffing pad to buff and polish the surface of the hot tub.

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