Works great on my basement wall cracks, finally stopped the seeping water issue.








Clear Leak Sealer Paste for Walls, Roofs & Pipes – Waterproof Barrier Coating for Concrete, Wood, Metal & Tile Repair | Thomler
Early Black Friday Sale
Seal Every Crack with Invisible, Permanent Protection
Stop water damage before it starts. This rubberized sealing paste soaks deep into hairline fissures and fractured surfaces, creating an unbreakable moisture barrier that won't peel, yellow, or crack over time. Perfect for emergency repairs on basement walls, bathroom grout, flat roofs, window frames, and drain pipes, it dries crystal-clear so you can paint or varnish right over the top. One brush-on application delivers years of defense against leaks, UV rays, and everyday wear—no contractors, no downtime, no mess.

Why You Need This
- Instant leak repair: Penetrates porous surfaces to bond at the molecular level, stopping seepage from ceilings, sills, and plumbing joints on contact.
- Crystal-clear finish: Dries completely see-through and non-yellowing, so it blends into any material without changing the look or requiring touch-up paint.
- Multi-surface formula: Works on wet or dry concrete, wood, brick, PVC, metal, and ceramic—even over existing finishes—for foolproof versatility.
- Weather-proof resilience: Forms a flexible, UV-stable shield that resists temperature swings, chemical exposure, and corrosion for long-term durability.
- Zero harsh fumes: Water-based, non-toxic formula is safe for indoor use in kitchens, bathrooms, and living spaces without ventilation concerns.
- Paintable surface: Once cured, you can apply any topcoat or sealant for a custom finish that matches your decor perfectly.
Built for Real-World Repairs
Whether you're patching a leaky gutter, sealing a cracked foundation, or protecting an outdoor deck from rain, this clear waterproof paste gives you professional results with a simple brush. Each kit includes a high-quality applicator brush and arrives ready to use—just open, apply, and let it cure. Backed by Thomler's commitment to quality, every order ships free across the United States, and our 30-day return policy means you can buy with complete confidence. Transform problem spots into permanent solutions and enjoy peace of mind in every season.
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.
Choose options








What Our Customers Say
Discover what makes THOMLER special.
Clear finish is perfect, you can't even tell it's there after drying completely.
Applied it to roof leaks myself, held up through heavy rain no problem.
Used this on bathroom grout and around my old window frames where water kept getting in. Dries totally invisible and I painted right over it without any prep work. Really solid fix for the price.
Fixed a pinhole leak in my copper pipes with this stuff last month. Still holding tight after multiple freeze-thaw cycles, which honestly surprised me given how simple the application was.
Grabbed a kit for our deck stairs and concrete foundation cracks before winter hit. Six weeks in and nothing's cracked or peeled yet, plus the no-fume formula meant I could work indoors staging nearby without opening every window in the house.
As seen in
Yours, the moment we pack it
- Hand-packed with care
- Checked before it ships
- Arrives exactly as pictured
Straight From Your Camera Roll
You May Also Like
A note from our team
Shopping for your home shouldn't feel like a gamble.
Too many products look great online and disappoint when they arrive. That's why we only pick pieces we'd happily put in our own homes.
Not right for you? Send it back within 30 days, no hassle. And when you email us, a real person from our small team answers.
The Thomler Team
shipping
returns
24 hours