9900 Structural Sealant – Waterproof Weatherproof Adhesive
9900 Structural Sealant – Waterproof Weatherproof Adhesive
9900 All-Purpose Structural Sealant – Strong, Weatherproof & Quick-Drying
Meet your go-to solution for sealing, bonding, and gap-filling on virtually any surface. The 9900 Structural Sealant is a multipurpose, high-strength silicone-based sealant engineered for both indoor and outdoor applications. Whether you're tackling a home renovation, a roofing project, or a quick DIY fix, this cartridge delivers a professional-grade, long-lasting seal every time.
Made in Mainland China.
Key Features
- Multi-Surface Bonding: Adheres strongly to plastics, wood, metal, stone, glass, ceramic, concrete, and more — a true all-in-one structural adhesive.
- Waterproof & Weatherproof: Creates a durable, moisture-resistant seal that withstands rain, humidity, UV exposure, and temperature extremes — ideal for roofs, bathrooms, doors, and windows.
- Flexible Seal: Accommodates natural movement and vibration, preventing cracks and maintaining structural integrity over time.
- Quick-Drying Formula: Sets fast so you can complete projects efficiently without long wait times.
- Easy Application: Standard 22 × 5 cm cartridge is fully compatible with a standard caulking gun for clean, controlled dispensing.
- Indoor & Outdoor Use: Perfect for construction, maintenance, and DIY projects — sealing gaps, filling joints, and bonding surfaces inside and out.
Specifications
| Type | Structural Silicone Sealant / Adhesive |
| Cartridge Size | 22 × 5 cm |
| Application Tool | Standard Caulking Gun (not included) |
| Suitable Surfaces | Plastic, Wood, Metal, Stone, Glass, Ceramic, Concrete |
| Use Cases | Roofing, Bathrooms, Walls, Doors, Windows, DIY & Construction |
| Waterproof | Yes |
| Weatherproof | Yes |
| Origin | Made in Mainland China |
Ideal For
- Sealing roof seams and flashing
- Bathroom and kitchen caulking around sinks, tubs, and tiles
- Bonding door and window frames
- Filling gaps and cracks in walls, stone, and concrete
- General construction and repair projects
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Frequently Asked Questions
Q: What surfaces can the 9900 Structural Sealant bond to?
A: The 9900 Sealant is formulated for multi-surface adhesion. It bonds effectively to plastics, wood, metal, stone, glass, ceramic tile, and concrete — making it suitable for a wide range of indoor and outdoor repair and construction tasks.
Q: Is this sealant suitable for outdoor use in wet or extreme weather conditions?
A: Yes. The 9900 Structural Sealant is both waterproof and weatherproof. It resists moisture, rain, UV rays, and temperature extremes, making it an excellent choice for roofing, exterior walls, window frames, and other outdoor applications.
Q: What size cartridge does this sealant come in, and what gun does it require?
A: Each unit comes as one standard 22 × 5 cm cartridge, compatible with a standard caulking gun (sold separately) for easy, mess-free application.
Q: How long does it take for the sealant to dry?
A: The 9900 Sealant features a quick-drying formula that sets rapidly after application, minimizing downtime so your project can proceed without lengthy delays. Full cure time may vary depending on ambient temperature and humidity.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.