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Fiberglass Swimming Pool & Hot Tub
Gel coat Application

How to Apply Swimming Pool Gel coat and Fibre-Shelkote resin

NOTE: These directions apply only to a fiberglass swimming pool or hot tub that was manufactured in a factory and dropped into the ground.

These directions do not apply to a swimming pool or hot tub that was re-surfaced with fiberglass. If your pool was previously re-surfaced, please visit our corporate web site at UGlassIt Pool Resurfacing, Inc. for complete instructions.

Fiberglass pool refinishing is always necessary after about 15-20 years of use. These pools are known for strength and durability, but eventually they will need some cosmetic help. Hot tubs and other fiberglass containments with heated water will need new gel coat (sometimes referred to as fiberglass paint) even sooner.

The "facelift" is a 7 or 8 step process which will restore the pool, spa, hot tub, or baptistery to its original beauty and watertight condition for many years to come.

Fiberglass Containments Only

*Method 1 - Sand Blasting

Remove all (about 99%) of the existing gel coat (the outside color which is usually white or blue by sandblasting (recommended), We recommend that you contact a professional sand blasting contractor for the gel coat removal on a swimming pool. We also recommend they call our offices for the information necessary to sandblast fiberglass safely.

NOTE:
Sand blasting-off gel coat on a swimming pool is not possible with inexpensive rental (Home Depot, Lowe's, etc.) sand blasting equipment, however it works reasonably well on spa's, hot tubs and vinyl liner pool steps.

  1. Remove nearly all existing gel coat. Have contractor remove all the sand when he is finished.

  2. Clean the pool with water and let dry overnight.

  3. Repair any divots (caused by the sand) with Fibre-Shelkote putty. Let dry, then lightly sand, with 200-300 grit sandpaper, the putty until it conforms to the contour of surrounding fiberglass.

  4. Wash down the surface with solvent immediately prior to the resin application. We'll explain an easy method.

  5. Roll-on Fibre-Shelkote resin to smooth the surface. Do the walls first, then the bottom. Wait until dry, but still a little tacky. Important, we will explain.

  6. Roll-on the first coat of Fibre-Shelkote gel coat. Cover the entire pool surface doing the walls first, then the flat bottom.

  7. When entire surface is dry with absolutely no tackiness, roll-on the second coat of Fibre-Shelkote gel coat.

  8. As soon as the surface is completely dry with no tackiness (1-2 hours depending on temperature, humidity, and direct sunlight), roll-on the third and final coating of Fibre-Shelkote gel coat. Outdoor pools must remain empty to cure for 3 full days, indoor pools for 5 full days.
    *Sandblasting fiberglass is a new concept for most contractors. To expedite to completion and avoid any possibility of damage, we provide the technical information regarding medium, nozzle size, psi, and cubic feet per minute (cfm). By taking advantage of our experience, most fiberglass pools can be completed in one day.

Method 2 - Hand Sanding

Sand the gel coat, removing all the color, sand with an angle grinder and a 24 grit sanding pad (available at Home Depot and Lowe's)

  1. Sweep the walls and bottom thoroughly removing all the ground gel coat (about 5 to 6 large leaf bags). Wash the pool with water and let dry overnight.

  2. Repair any cracks and blisters with Fibre-Shelkote putty. Let dry, then lightly sand the putty down to the contour of the surrounding fiberglass using 200-300 grit sandpaper.

  3. Wash down the surface with solvent immediately prior to the application of Fibre-Shelkote resin. We'll explain how.

  4. Roll-on Fibre-Shelkote resin to smooth the surface. Do the walls first, then the bottom. Wait until dry, but still a little tacky.  Important, we will explain.

  5. Roll-on the first coat of Fibre-Shelkote gel coat. Cover the entire pool surface doing the walls first, then the flat bottom.

  6. When entire surface is dry with absolutely no tackiness, roll-on the second coat of Fibre-Shelkote gel coat.

  7. As soon as the surface is completely dry with no tackiness (1-2 hours depending on temperature, humidity, and direct sunlight), roll-on the third and final coating of Fibre-Shelkote gel coat. Outdoor pools must remain empty to cure for 3 full days, indoor pools for 5 full days.

Call our office at 800-830-0501 to determine the exact amount of swimming pool gel coat and Fibre-Shelkote resin required for your pool.

Our swimming pool gel coat will dry quickly, so you won't need to worry about rain after it is dry. However, it does take between one and two hours, so schedule the application accordingly. Low temperature, no direct sunlight, and high humidity can cause drying to take up to two hours.

The fiberglass containment (pool, hot tub, spa, baptistery, fiberglass steps, sliding board, etc.) must remain empty while the gel coat cures. Typical curing time is 3 days for outdoor pools and 5 days for indoor pools. Indoor pools should be ventilated during and after the application.

After the surface has cured, fill the pool and that's it. It will look as good as the day it was brand new, and will not leak or stain for 15 to 20 years. After that, the process must be performed again.

Fibre-Shelkote™ gel coat is brilliant white, however it can be tinted to any of the colors shown on our gel coat color chart. For outdoor containments, we recommend white or light blue, or any other light color. Darker colors, in direct sunlight, will fade long before resurfacing time rolls around again.

Always be careful when using an electric sander. Wear a mask and safety goggles when sanding, and gloves when using Fibre-Shelkote resin, gel coat and acetone. A chemical odor mask or a respirator is recommended when applying chemicals outdoors, and a respirator mask is mandatory for indoor projects.

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Pool and Hot Tub Resurfacing
Fibre-Shelkote™ Distributors
607 Louis Drive Suite I
Warminster, PA 18974
800-830-0501

®UGlassIt is a registered mark of ®UGlassIt Pool Resurfacing, Inc.
Fibre-Shelkote
is a trademark of Fibre-Shelkote Products, LLC

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Page last updated on Wednesday, September 04, 2013

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