Aqua Shield 314.920.9958 Request a quote

Lake Saint Louis · Greater St. Louis

Fiberglass pool repair & gel coat restoration

We fix cracks, blisters and worn finishes in fiberglass pools, and keep the whole system running with openings, closings, water testing and equipment service.

Request a free quote Call 314.920.9958

Serving St. Charles County, St. Louis County, St. Louis City and surrounding communities.

Aqua Shield Fiberglass Pool Repair logo

Services

Repair first. Maintenance all season.

Fiberglass pools need different care than vinyl or plaster. Every job we take on is done with the shell and its gel coat in mind.

Fiberglass repair & restoration

For damage to the shell and its finish.

  • Crack repairSpider cracks, stress cracks and star cracks ground out, filled and color-matched.
  • Blister repairOsmotic blisters opened, dried, filled and sealed so they don't return.
  • Gel coat restorationFading, chalking and stains brought back with compounding, polishing or a full refinish.
  • Steps, benches & ledgesChips, gouges and worn edges in high-traffic spots rebuilt and refinished.
  • Structural damageDelamination and damaged laminate assessed and repaired.

Routine pool maintenance

Keep the pool clean, balanced and running.

  • Pool openingCover off, lines and equipment brought online, water balanced for the season.
  • Pool closingWater lowered, lines blown out and winterized, cover installed.
  • Water chemistry testingFull panel testing with balancing suited to fiberglass finishes.
  • Deck power washingConcrete and paver decks cleaned of algae, dirt and staining.
  • Heater repairDiagnosis and repair for gas heaters and heat pumps.
  • Equipment installationPumps, filters, heaters, automation and salt systems installed.

Gel coat field guide

Signs your finish needs attention

Gel coat is the thin, colored layer that makes a fiberglass pool smooth and watertight. Catching these early keeps a small repair from becoming a refinish.

Spider & star cracks

Fine cracks that branch out from a point, often near steps, corners or where something heavy hit the shell.

Blisters

Raised bumps, from pea-sized to coin-sized, caused by water working its way behind the gel coat.

Chalking & fading

A dull, powdery surface or washed-out color, usually from sun exposure or water that ran out of balance.

Staining

Brown, green or blue marks from metals in the water, leaves or chemical damage that won't brush off.

Water testing

Balanced water protects the finish

Water that is too aggressive or too hard is one of the most common causes of gel coat damage. Every service visit includes a full test, and we adjust for fiberglass rather than plaster.

ReadingTypical targetWhy it matters
Free chlorine1–3 ppmSanitizes without bleaching the finish
pH7.4–7.6Low pH etches; high pH scales
Total alkalinity80–120 ppmHolds pH steady
Calcium hardness150–250 ppmToo high leaves scale on gel coat
Cyanuric acid30–50 ppmShields chlorine from the sun

General ranges. Salt pools and your pool manufacturer's guidelines may call for different targets.

Parts & equipment

Need a part? We'll source it.

Tell us the brand and model, or send a photo of the old part, and we'll find the right replacement and quote it installed or for pickup.

Request a part
  • Pumps, motors and seals
  • Filters, cartridges and valves
  • Heaters and heat pump parts
  • Salt cells and automation
  • Gel coat repair kits and covers

Request a quote

Tell us about your pool

We'll get back to you within one business day. For repairs, photos help: we'll ask for them when we reply.

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