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Maxisil Swimming Pool Silicone Sealant 10.5fl oz (310ml)

TILE PRO RATING: GoodBetterBest

The premium Underwater Silicone Sealant for Pools — Dive into Unmatched Durability with Maxisil P.

$18.95

Item No.: RDX1004C

attribute_pa_color_finish: p9-clear

Item No.: RDX1004W

attribute_pa_color_finish: p1-white

Item No.: RDX1004B

attribute_pa_color_finish: p7-black

Item No.: RDX1004IV

attribute_pa_color_finish: p5-ivory

Item No.: RDX1004G

attribute_pa_color_finish: p4-grey

Item No.: RDX1004LG

attribute_pa_color_finish: p3-light-grey

Item No.: RDX1004OW

attribute_pa_color_finish: p2-off-white

Ensure a permanent, waterproof seal with Maxisil Swimming pool silicone sealant (Maxisil P). Formulated specifically for constant water immersion, this premium 100% RTV neutral-cure silicone delivers outstanding adhesion on ceramic, glass, and natural stone pool tiles while aggressively resisting UV rays, harsh chlorine, and mold.

Premium Underwater Silicone Sealant for Pool, Fountains & Spa Tiles

When standard caulks fail in aquatic environments, professional tile contractors and pool builders turn to Maxisil pool silicone. Engineered specifically for constant water immersion, this premium swimming pool silicone sealant is designed to withstand the harshest conditions in swimming pools, spas, public showers, and water fountains.

Unlike standard bathroom caulks, this underwater silicone for pools features a specialized neutral-cure formula that is completely safe for sensitive natural stone and glass mosaics. It forms a flexible, highly durable bond that resists the degrading effects of UV exposure, saltwater, and heavy pool chemicals. Whether you are sealing expansion joints, repairing waterline mosaics, or securing skimmers and fittings, Maxisil pool sealant guarantees a hygienic, crystal-clear joint backed by powerful built-in fungicides to prevent mold and mildew growth.

Available in nine UV-stable colors designed to seamlessly cross-match with popular pool grout shades, it ensures a flawless finish for both commercial and residential aquatic installations.

Maxisil Pool Silicone Sealant is a neutral‑cure, 100% RTV silicone formulated specifically for constant water immersion. Trusted by professionals, it delivers long‑lasting, flexible bonds that resist chlorine, saltwater, and UV exposure.

Ideal Applications

Surface Use
Ceramic & porcelain tile Expansion joints & tile repairs
Natural stone Sealing coping & waterline mosaics
Glass tile Decorative accents & pool interiors
Concrete & fiberglass Skimmers, drains, and fittings

Color Options

Choose from nine UV‑stable colors to perfectly complement your pool design:

  1. P1 White
  2. P2 Off White
  3. P3 Light Grey
  4. P4 Grey
  5. P5 Ivory
  6. P6 Sand
  7. P7 Black
  8. P8 Blue
  9. P9 Clear

Frequently Asked Questions

What makes Maxisil P ideal for underwater applications?

Maxisil P is specifically formulated as an underwater silicone sealant for pools. Its 100% RTV neutral-cure silicone composition ensures it can withstand constant water immersion, making it perfect for pools, spas, and water fountains. It provides a permanent, waterproof seal that adheres exceptionally well even in wet conditions.

Can Maxisil P be used on all pool surfaces?

Yes, Maxisil P is safe for use on a wide variety of pool surfaces. Its specialized neutral-cure formula is designed to not stain or damage sensitive materials like natural stone, glass tiles, porcelain, concrete, and fiberglass. This makes it a versatile swimming pool silicone sealant for any aquatic installation.

Where can I purchase Maxisil P?

If you’re wondering maxisil pool silicone where to buy, it’s important to know that Maxisil P is a professional-grade product. You can purchase it directly from authorized premium tile tooling distributors like Tile Pro Depot. These suppliers offer nationwide shipping and competitive pricing, ensuring you get the best maxisil pool silicone for your project.

How does Maxisil P resist mold and chemicals?

Maxisil P features advanced anti-mold technology with powerful built-in fungicides to actively prevent mold and mildew growth, even in permanently wet environments. Additionally, its formulation is highly resistant to harsh pool chemicals, including chlorine and saltwater, as well as damaging UV rays, ensuring long-lasting durability and a hygienic seal.

  • Built for Constant Immersion: The premier underwater silicone sealant for pools, spas, and water fountains.
  • Chemical & UV Resistant: Formulated to endure harsh pool chemicals (including chlorine and saltwater) and damaging UV rays without breaking down or discoloring.
  • Safe on All Surfaces: 100% RTV neutral-cure formula will not stain or damage natural stone, glass tile, porcelain, concrete, or fiberglass.
  • Anti-Mold Technology: Contains powerful built-in fungicides that actively prevent mold and mildew growth in permanently wet conditions.
  • Exceptional Adhesion: Delivers outstanding bond strength under both wet and dry conditions.
  • Perfect Color Matching: Available in 9 color-fast pigments (White, Off White, Light Grey, Grey, Ivory, Sand, Black, Blue, and Clear) designed to match popular grout colors.

How to Use

1.Surface Preparation:Crucial for underwater adhesion.

Ensure all joints, gaps, and surfaces are thoroughly cleaned. Remove any dirt, grease, old caulk, or efflorescence. While Maxisil provides outstanding wet/dry adhesion, starting with a clean substrate ensures maximum lifespan.

2.Prepare the Cartridge:Cut nozzle to joint width.

Cut the tip of the cartridge above the threads. Attach the nozzle and cut it at a 45-degree angle to match the exact width of your expansion joint or repair area.

3.Apply the Sealant:Maintain steady pressure.

Load the cartridge into a standard caulking gun. Apply the silicone evenly into the joint, ensuring it makes full contact with both sides of the tile or substrate to prevent water bridging.

4.Tool and Smooth:Finish before the skin forms.

Immediately tool the joint using a smoothing tool or a finger dipped in a mild soapy water solution. This ensures a neat, professional finish and forces the silicone deeper into the joint for a tighter seal.

5.Cure Time:Allow full cure before immersion.

Allow the silicone to fully cure according to the manufacturer’s environmental guidelines before filling the pool or exposing the joint to constant water immersion or heavy chemicals.

 

Contractor Bulk Supply & Availability Are you a contractor asking yourself maxisil pool silicone where to buy? Maxisil P is a specialized professional-grade product not typically found in big-box hardware stores.

It is available for immediate nationwide shipping through premium tile tooling distributors, including Tile Pro Depot. Both platforms offer competitive pricing on individual 10.5 fl oz cartridges, all 9 color-matching options, and dedicated bulk shipping for large commercial pool installations. Ensure your next aquatic build is protected by the industry’s best underwater sealant.