Waterproof Silicone Sealant – High Temp, Black, White & Clear

Lvkang 9900 Weatherproof Silicone Sealant – Professional-Grade Sealing for Every Surface

Keep moisture, drafts, and temperature extremes where they belong — outside. The Lvkang 9900 Weatherproof Engineering Adhesive is a high-performance silicone sealant engineered for both professional tradespeople and confident DIYers. Whether you're sealing bathroom tiles, repairing roof joints, waterproofing curtain walls, or finishing sunroom frames, this versatile sealant delivers a smooth, durable, and long-lasting bond every time.

Made in Mainland China.

Key Features

• High Flexibility & Tear Resistance: Designed to handle stretching, pulling, and extreme temperature fluctuations without cracking or losing integrity. Stays elastic whether it's scorching hot or freezing cold.
• Smooth, Easy Application: Extrudes finely and evenly for a bubble-free, professional finish — no rough edges, no air holes, no mess.
• Waterproof & Heat-Resistant: Formulated to resist water, UV rays, and high temperatures, creating a permanent waterproof barrier against leaks, cracks, and weather damage — indoors and out.
• 3 Color Options: Available in White, Black, and Transparent (Clear) to blend seamlessly with walls, tiles, stone, metal, and more.
• Wide Application Range: Perfect for curtain walls, skylights, aluminum panel structures, sunroom frames, bathroom tile sealing, roof repairs, and metal joints.

Specifications

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

What's in the Box?

• 1 × Silicone Waterproof Sealant (colour of your choice)

Perfect For

• Bathroom & kitchen tile sealing
• Roof crack and joint sealing
• Curtain walls, skylights & aluminum structures
• Sunroom & conservatory frames
• Indoor and outdoor wall sealing
• Metal joint waterproofing

Looking for more home repair and DIY tools? Check out the BALASHOV 2500W Handheld Steam Cleaner for deep cleaning surfaces before sealing, or the Air Compressor Pressure Gauge for your other DIY and workshop needs.

Learn more: OSHA on personal protective equipment

Frequently Asked Questions

Q: What surfaces is this waterproof silicone sealant compatible with?

A: The Lvkang 9900 silicone sealant bonds to a wide variety of surfaces including ceramic tiles, glass, metal, aluminum, stone, concrete, and most painted walls. It's ideal for bathrooms, roofs, curtain walls, skylights, and sunroom frames — anywhere a flexible, waterproof seal is needed.

Q: How long does the silicone sealant take to cure, and how long does it last?

A: Cure time will vary depending on temperature and humidity, but a surface skin typically forms within 30–60 minutes. Full cure is generally achieved within 24 hours. With a shelf life of 12 months (stored below 27°C in a cool, dry place), and once applied, the sealant is designed for long-term, permanent performance — remaining flexible and crack-free through extreme temperature swings.

Q: Which colour should I choose — Black, White, or Transparent?

A: Choose White for light-coloured tiles, walls, or bathroom fixtures; Black for dark surfaces, aluminium frames, or modern industrial finishes; and Transparent/Clear for glass, stone, or any surface where you want the sealant to be virtually invisible. All three colours deliver the same high-performance waterproof and heat-resistant seal.