Our product in use
Excellent 4.9 | 15,400+ Homeowners
Professional Grade Sealant

Fix leaks that actually stay fixed

Stop repairing the same crack every season. This transparent formula bonds to wet surfaces and seals for years without reapplication.

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Permanent Seal
Fast Free Shipping
All-Surface Rated
Guaranteed Waterproof
A 300-gram container of transparent waterproof glue with an applicator brush resting on a clean, modern surface.
Trusted by 15,000+ DIY experts

The last sealant you will buy

Our water-rubber formula penetrates deep into cracks, creating a flexible barrier that won't peel, yellow, or shrink over time.

  • Bonds directly to wet or damp surfaces

  • Dries completely clear for invisible repairs

  • Resistant to extreme heat and freezing cold
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Why contractors choose Velnexa over silicone

Standard hardware store sealants shrink and peel within months. Our formula creates a permanent bond that adapts to movement.

Upgrade Your Repair
300g Professional Size
Velnexa Glue Generic Sealants
Wet Surface Application
Crystal Clear Curing
Zero-Shrink Formula
Integrated Brush Applicator
UV and Weather Resistant

The standard for Permanent Repairs

4.9 15,422 Customers

What homeowners are saying

Real Results

4.9 out of 5
Marcus T. review photo

Used this on a basement crack that had been weeping for three years. Brushed it on without draining the area and it held through the next heavy rain. Solid after 18 months.

Marcus T.
Sarah L. review photo

Finally, a glue that actually stays clear. I patched my aquarium and you can't even see where the crack was. Most other glues turn yellow but this is still invisible.

Sarah L.
David R. review photo

The brush makes it so easy. No messy tubes or caulking guns needed. I sealed my window frames in ten minutes and the seal is rock hard but flexible.

David R.
Jim K. review photo

I've tried every hardware store brand for my stone patio. This is the only one that didn't peel off the concrete after the first winter freeze. Worth every penny.

Jim K.
Elena M. review photo

Worked perfectly on my leaking gutter even while it was drizzling outside. Most sealants need a bone-dry surface, but this gripped the wet metal instantly.

Elena M.
Tom B. review photo

The consistency is perfect. It's thick enough to stay where you put it but flows into the cracks to create a real seal. No more leaks under my kitchen sink.

Tom B.