Silicone Waterproof Sealant for Walls, Tiles & Outdoor Use

Lvkang 9900 Weatherproof Engineering Silicone Sealant

Meet the last sealant you'll ever need. The Lvkang 9900 Weatherproof Engineering Adhesive is a premium silicone sealant engineered for both professional contractors and DIY homeowners. Whether you're sealing tile grout, repairing curtain walls, or weatherproofing a sunroom, this sealant delivers a clean, durable, waterproof bond — every single time.

Made in Mainland China.

Key Features

• High Flexibility & Tear Resistance: Stretches and flexes without cracking, even under extreme heat or freezing temperatures. Perfect for joints and surfaces that experience regular movement.
• Smooth & Professional Application: The specially formulated consistency extrudes finely and evenly for a smooth, bubble-free finish — no rough edges, no air pockets, just a clean professional seal.
• Waterproof & UV-Resistant: Forms a permanent waterproof barrier that resists water infiltration, UV radiation, and high temperatures — ideal for indoor and outdoor applications alike.
• 3 Color Options: Available in White, Black, and Clear (Transparent) so you can match any surface seamlessly — walls, tiles, stone, glass, or metal.
• Incredibly Versatile: Suitable for curtain walls, skylights, aluminum panel structures, sunroom frames, tile sealing, metal joints, window frames, and more.

Product Specifications

• Product Name: Lvkang 9900 Weatherproof Engineering Adhesive
• Material: Silicone Rubber
• Weight: Black/White — 750g | Transparent — 500g
• Available Colors: Black, White, Transparent
• Shelf Life: 12 months when stored below 27°C in a cool, dry environment
• Origin: Mainland China

Where to Use It

This versatile silicone adhesive is perfect for a wide range of applications:

• 🏠 Home & Kitchen: Bathtubs, sinks, shower tiles, countertops, window sills
• 🏗️ Construction & Engineering: Curtain walls, skylights, aluminum frames, structural joints
• 🌿 Outdoor & Garden: Sunrooms, greenhouses, exterior wall cracks, roof joints
• 🔩 Metal & Industrial: Metal panel bonding, HVAC sealing, ductwork

What's in the Box?

• 1 × Silicone Waterproof Sealant (color/size as selected)

For guidance on safe use of adhesives and sealants in the home, visit the U.S. Consumer Product Safety Commission (CPSC) for safety information on construction chemicals and adhesives.

Learn more: Sealant

Frequently Asked Questions

Q: Is this silicone sealant suitable for outdoor use?

A: Yes! The Lvkang 9900 Weatherproof Silicone Sealant is fully formulated for both indoor and outdoor applications. It resists UV rays, water, and extreme temperature changes, making it ideal for exterior walls, curtain walls, skylights, and outdoor metal joints.

Q: How long does the silicone sealant take to cure fully?

A: Surface skin forms within approximately 10–20 minutes under normal conditions (25°C, 50% humidity). Full cure typically takes 24–48 hours depending on temperature, humidity, and joint thickness. Avoid exposing the sealed area to water during the curing process.

Q: Can I use this sealant on tiles and bathroom walls?

A: Absolutely. This silicone adhesive sealant is specifically designed for use on tiles, stone, ceramic, and bathroom walls. Its waterproof formula provides a long-lasting, mold-resistant seal around tubs, showers, sinks, and countertops.

Q: What surfaces is this sealant compatible with?

A: The Lvkang 9900 bonds effectively to a wide range of surfaces including glass, ceramic tile, stone, most metals (aluminum, steel), painted surfaces, and wood. It is not recommended for use on polyethylene (PE) or polypropylene (PP) plastics without a primer.

Q: Which color should I choose for a clean finish?

A: Choose White for bright tiles and walls, Black for dark surfaces, metal frames, or industrial applications, and Clear/Transparent for glass, natural stone, or anywhere you want the sealant to be invisible once applied.