Black Jack Leak Stopper Rubber Flexx, 15 oz Waterproof Flexible Industrial Sealant, Black, 1 Piece
Black Jack Leak Stopper Rubber Flexx, 15 oz Waterproof Flexible Industrial Sealant, Black, 1 Piece
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Black Jack Leak Stopper Rubber Flexx, 15 oz Waterproof Flexible Industrial Sealant, Black, 1 Piece

Key item features

  • Versatile Repair: This flexible sealant offers a reliable solution for fast, effective repairs on multiple surfaces, including gutters, pipes, roofs, skylights, flashings, and windows.
  • Durable Rubberized: The rubberized finish remains pliable, expanding and contracting with surface movements to withstand temperature changes and prevent brittleness or detachment.
  • Resistant Formula: Specially formulated to resist cracking, peeling, and aging, this sealant maintains performance over time, reducing the need for repeat applications.
  • Quick Drying: Designed for convenience, the product dries to the touch in just 10 minutes and fully cures within 6 hours, allowing for faster project completion.
  • Sleek Black: Available in a clean black color, the sealant provides a professional appearance that blends well with dark roofing, piping, or flashing components.
  • Waterproof Sealant: This 15 oz Rubber Flexx creates a waterproof seal that withstands a range of temperatures, resisting cracking and peeling for long-lasting solutions.
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Customer ratings & reviews

3.9 out of 5 stars
stars163 ratings57 reviews
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Reviews summary

Pros

  • : Offers good value at this cost.

Cons

  • : Does not dispense in a smooth, consistent pattern.
  • : May not completely seal small leaks, requiring reapplication.
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Showing 1-3 of 57 reviews

Aug 25, 2025
anonymous
Item details
Multipack quantity: 1
Sold and shipped byProSolutionsDirect
5 out of 5 stars review

Verified Purchase

Good Product

Shake and spray, wait and if needed reapply, basically follow the directions, good for average leak.

Helpful?5C6CM303BDPV39086835
Apr 8, 2026
Katherine
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

This really works, used it to stop a leak and my storage container

Helpful?5C6CM303BDPV39086835
Oct 7, 2025
WalmartCustomer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

It was exactly what I needed and exactly how it was described on the website

Incentivized Review
Helpful?5C6CM303BDPV39086835