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Waterproof Silicone Sealant | Weather-Resistant Flexible Joint Compound for Indoor & Outdoor Use | Multi-Surface Adhesion | Thomler
Permanent Protection That Moves With Your Home
This professional-grade silicone compound creates waterproof barriers in gaps, joints, and transitions throughout your property. Once cured, it remains permanently flexible to accommodate structural shifts, temperature changes, and vibration without cracking or pulling away. The fast-curing formula bonds strongly to glass, concrete, metal, tile, brick, mortar, and aluminum, delivering clean, weather-resistant seals that stand up to moisture, UV exposure, and temperature extremes from -58°F to 302°F. Perfect for bathroom fixtures, window frames, exterior joints, and anywhere you need lasting protection against the elements.
Why You Need This
- Superior Multi-Surface Grip: Bonds reliably to glass, metal, masonry, and more without primers or prep work in most applications.
- Stays Flexible for Life: Absorbs expansion and contraction cycles without tearing, maintaining a watertight seal through every season.
- All-Weather Durability: Resists moisture penetration, UV degradation, and temperature swings for dependable exterior and interior performance.
- Quick Work Window: Sets rapidly so you can finish projects efficiently and achieve smooth, professional-looking joints without extended wait times.
- Low-Odor Neutral Cure: Won't corrode sensitive metals or emit harsh fumes during application, making it safer for enclosed spaces.
- Versatile Project Partner: Ideal for bathtub surrounds, kitchen backsplashes, window glazing, roof flashing, and countless repair tasks around the house.
Built to Last, Easy to Apply
Whether you're sealing a shower enclosure, weatherproofing an exterior door frame, or repairing cracked joints in masonry, this silicone compound delivers the professional-grade durability you need with straightforward application. The neutral-cure formula means it's safe for virtually any substrate, and its impressive adhesive strength of 950 kPa ensures joints stay secure under stress. Once applied, the sealant forms a flexible membrane that moves with your building materials, preventing water intrusion and drafts while maintaining a neat, finished appearance. Every tube comes ready to use, and with free US shipping and our 30-day return policy, you can tackle your sealing projects with confidence.
Free shipping across the United States — always, with no minimum order.
Every order is carefully packed and sent with Track & Trace, so you can follow your package every step of the way.
Order today? We ship the next business day.
Not completely happy? You have 30 days to return your purchase.
On top of that, we offer a 3-year warranty against manufacturing defects — your investment is in good hands.
Made for everyday
Practical pieces you’ll actually use.
Quality first
Chosen for quality you can feel.
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A Note From Our Founder
When I started Thomler, I wanted one thing — to make it easy to find pieces that actually make a home feel like yours, without the markup. Every item we carry is one I'd happily put in my own home. And if it's ever not right, you've got 30 days to send it back, no stress. I'm only ever an email away.