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Gardner-Gibson Black Jack All-Weather Roof Cement 4.75G

  • Based on 13 reviews
Condition: New
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As low as $14.30 / mo
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Availability: In Stock.
Fulfilled by Hearthshire

Arrives Saturday, Sep 5
Order within 20 hours and 34 minutes
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Features

  • SUPERIOR WATERPROOF SEAL - Provides a durable waterproof barrier for roofs. Ideal for protecting against leaks and harsh weather on flat or sloped surfaces. Suitable for year-round use.
  • ASPHALT GEL FORMULA - Easy-to-apply asphalt gel spreads smoothly for even coverage. Perfect for sealing cracks and joints on asphalt shingle roofs and other roofing materials.
  • LARGE 5 GALLON SIZE - Convenient 5 gallon pail covers large areas, making it ideal for big repairs or multiple projects. Reduces the need for frequent reapplication.
  • VERSATILE ROOFING APPLICATIONS - Works as a roof cement and roofing sealant for metal, rubber, and asphalt roofs. Compatible with a variety of roofing systems and materials.
  • LONG-LASTING PROTECTION - Designed for lasting adhesion and flexibility. Resists cracking and peeling, ensuring your roof stays protected and sealed for extended periods.

Description

Black Jack All-Weather Roof Cement by Gardner-Gibson is a high-performance asphalt-based patching compound designed for long-lasting repairs on cracks, seams, and holes in roofing materials. This waterproof roof cement is ideal for both emergency repairs and new construction, providing a strong seal that helps prevent leaks and water damage. Its gel form makes application easy and precise, ensuring a tight bond on a variety of surfaces, including asphalt shingles, metal roofs, and flat roofs. The compact 5-gal. package is perfect for larger projects, while the black color blends seamlessly with most roofing materials for a professional finish. Use this asphalt roof sealant to set flashings, drip edges, and roofing material edges, or as a reliable roofing tar for patching and sealing. Suitable for use as a flat roof sealant or metal roof sealant, this product delivers durable, weather-resistant protection in all climates. With Gardner-Gibson’s trusted quality, you can count on this roof cement to provide superior waterproofing and long-term performance for your roofing needs.

Brand: Gardner-Gibson


Style: Compact


Water Resistance Level: Waterproof


Item Form: Gel


UPC:


Brand Name: Gardner-Gibson


UPC: 027134623059


Number of Packs: 5


Unit Count: 640 Fluid Ounces


Number of Items: 1


Manufacturer: Gardner-Gibson


Model: 6230-9-30


Part Number: 6230-9-30


Water Resistance Level: Waterproof


Item Form: Gel


Compatible Material: Asphalt, Metal, Tile, Shingle


Style Name: Compact


Color: Black


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Sep 5

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Seals Rubber to Steel Roof
Just what the doctor ordered. I have a steel roof and a rubber boot sealing my wood stove chimney. The freezing winters seemed to loosen the seal on the rubber boot. This product worked very well in resealing the boot and diverting the water around the boot instead of pooling against the boot. This product is notorious for magically getting on everything around it no matter how careful you are, and t does. Use disposable gloves when you use this product. ... show more
Reviewed in the United States on August 8, 2026 by MRG

  • Thick
Thick tar
Reviewed in the United States on October 30, 2025 by Toby Morrow

  • Thick and fibered tar
Most tar can be applied with a brush or sprayed. This will stay in place better without turning to a liquid.
Reviewed in the United States on July 22, 2025 by ron

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