Gardner-Gibson Black Jack 0318-Ga Liquid Synthetic Rubber Roof Patch Sealant 30 oz for Leak Repair
Gardner-Gibson

Black Jack 0318-Ga, Liquid Synthetic Rubber, Black Gardner-Gibson Roof Patch "Industrial Sealant", 2.76 lb 29 fl oz

|79 ratings
Black Jack 0318-Ga, Liquid Synthetic Rubber, Black Gardner-Gibson Roof Patch "Industrial Sealant", 2.76 lb 29 fl ozBlack Jack 0318 Ga Liquid Synthetic Rubber Black Gardner Gibson Roof Patch Industrial Sealant 2 76 lb 29 fl oz4 pack Black Jack 0318 Ga Liquid Synthetic Rubber Black Gardner Gibson Roof Patch Industrial Sealant 2 76 lb 29 fl oz2 pack Black Jack 0318 Ga Liquid Synthetic Rubber Black Gardner Gibson Roof Patch Industrial Sealant 2 76 lb 29 fl oz3 pack Black Jack 0318 Ga Liquid Synthetic Rubber Black Gardner Gibson Roof Patch Industrial Sealant 2 76 lb 29 fl oz
Pack SizeSingle

Key item features

Black Jack 0318-Ga, Liquid Synthetic Rubber, Black Gardner-Gibson Roof Patch "Industrial Sealant", 2.76 lb 29 fl oz

  • 100% Flexible & Waterproof Seal:Designed to seal and waterproof roofs walls gutters and foundations creating a barrier against water moisture and air
  • Easy Application:Can be applied by brushing rolling dipping or pouring
  • The thick black liquid flows into cracks and holes to form a watertight seal
  • Versatile Use:Suitable for both interior and exterior applications Bonds effectively to metal masonry wood and painted surfaces without peeling or cracking
  • Temperature Resistance:Strong resistance to rain ice snow and UV rays ensuring durability in various weather conditions

Specs

Industrial sealant type, Rubberized Leak Stopper Roof PatchRec. use, WoodRecommended surface, Multi-SurfaceDry time, 0 hRec location, Indoor and OutdoorBrand, Gardner-Gibson

About this item

Product details

A revolutionary advancement in roof patching and repair. This long-lasting rubberized repair is specially formulated to penetrate deep into areas and stop roof leaks instantly. The secret is Penetrex , a unique penetrating oil that reaches deep into the crack and forms a complete seal. With the addition of liquid rubber, this flexible, high-performance plastic cement provides a superior watertight bond that will stop problem leaks for good. Product formulated to be used year round. Leak Stopper is ideal for a variety of roof surfaces including shingles, built-up roofs, SBS modified roofs, metal roofs, and many other surfaces. It is highly recommended to reinforce larger repairs with a strip of reinforcing fabric.

Black Jack 0318-Ga, Liquid Synthetic Rubber, Black Gardner-Gibson Roof Patch "Industrial Sealant", 2.76 lb 29 fl oz

  • 100% Flexible & Waterproof Seal:Designed to seal and waterproof roofs walls gutters and foundations creating a barrier against water moisture and air
  • Easy Application:Can be applied by brushing rolling dipping or pouring
  • The thick black liquid flows into cracks and holes to form a watertight seal
  • Versatile Use:Suitable for both interior and exterior applications Bonds effectively to metal masonry wood and painted surfaces without peeling or cracking
  • Temperature Resistance:Strong resistance to rain ice snow and UV rays ensuring durability in various weather conditions
info:
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Specifications

Industrial sealant type

Rubberized Leak Stopper Roof Patch

Rec. use

Wood

Recommended surface

Multi-Surface

Dry time

0 h

Warranty

Warranty information

10 years

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Customer ratings & reviews

4.3 out of 5 stars
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79 ratings21 reviews
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How item rating is calculated
  1. 5 stars67% (53)
  2. 4 stars13% (10)
  3. 3 stars6% (5)
  4. 2 stars4% (3)
  5. 1 star10% (8)
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Showing 1-3 of 21 reviews

Jun 26, 2026
Reviewer name: Douglas
Top Reviewer
Item details
Multipack quantity: 1
Sold and shipped bySupply the Home
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Walmart guaranteed happiness

Good product, but I must have gotten the wrong size delivered to me because I bought two more gallons, so I returned the item, and with Walmart, I got my money back. Walmart is great, and happiness is guaranteed

Helpful?459D5P1M38V9555602878
Sep 16, 2026
Reviewer name: mike
Top Reviewer
Item details
Multipack quantity: 1
Sold and shipped bySupply the Home
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

very good roof repair

This is not a final solar to a roof leaking but will last all year and get you through when needed. I use this in a spot on my roof and it lasts all year. If your not replacing your roof you should put it on every year.

Helpful?459D5P1M38V9555602878
Feb 13, 2026
Reviewer name: greg
Top Reviewer
Item details
Multipack quantity: 1
Sold byADVENTURER'S BAGDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

This roof patch works great easy to work with seals immediately and drys fast

Helpful?459D5P1M38V9555602878
Current price is $18.99
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