BULLDOG® Wet Surface Roof Cement #78AF

BULLDOG® Wet Surface Roof Cement #78AF is a trowel-grade asphalt roof cement designed for emergency roof leak repair on wet or dry surfaces. Manufactured by Palmer Asphalt Company, this roof repair cement is formulated with asphalt, petroleum spirits, mineral fibers, stabilizers, and chemical additives to help create a secure bond in difficult repair conditions.

This product is especially useful when roof leaks need immediate attention and moisture is already present. According to the Product Data Sheet, BULLDOG® Wet Surface Roof Cement #78AF provides 100% wet surface adhesion when tested in accordance with ASTM D3409 and is designed to repel water away from the repair area during application. It can help stop most leaks while rain is falling or snow is melting, making it a practical choice for urgent roof maintenance situations.

What BULLDOG® Wet Surface Roof Cement #78AF Is Used For

BULLDOG® Wet Surface Roof Cement #78AF is designed for use on wet roof surfaces where fast emergency roof repairs are needed. It may also be used on dry surfaces and can adhere to asphalt, metal, and masonry surfaces. The product may be applied to both vertical and horizontal repair areas, giving contractors, property managers, and maintenance teams flexibility when addressing active leaks and damaged roof sections.

Because it is made for challenging repair conditions, this wet surface roof cement is well suited for situations where waiting for completely dry weather is not realistic. It is commonly used when a roof leak must be addressed quickly to reduce the risk of interior damage, water intrusion, and continued deterioration of the roof system.

Common Applications

• Emergency roof leak repair
• Wet surface roof repair
• Dry surface roof repair
• Asphalt roof surface repair
• Metal roof surface repair
• Masonry surface repair
• Vertical and horizontal roof repair applications
• Temporary repair work where moisture is present
• Maintenance repairs during rain, snow melt, or damp conditions

Key Features and Benefits

BULLDOG® Wet Surface Roof Cement #78AF is built for job-site situations where speed, adhesion, and moisture tolerance matter. Its trowel consistency allows the product to be applied with firm pressure, helping create a strong bond to the repair surface. The formula is designed to penetrate and adhere under water, making it a useful option for urgent roofing repairs when leaks cannot wait for a dry surface.

• Designed for wet surface repairs: Helps address active leaks when moisture is present.
• 100% wet surface adhesion: Tested according to ASTM D3409.
• Emergency roof repair use: Helps stop many leaks during rain or snow melt.
• Multi-surface adhesion: Suitable for asphalt, metal, and masonry surfaces.
• Vertical or horizontal application: Useful across different roof repair conditions.
• Trowel-grade consistency: Allows controlled placement and pressure during repair work.
• ASTM specification: Meets ASTM D4586, Type I, Class II.

Recommended Surfaces

BULLDOG® Wet Surface Roof Cement #78AF may be used on asphalt, metal, and masonry surfaces. It is designed for both wet and dry repair conditions, making it a versatile roof cement for maintenance crews and roofing professionals working across multiple commercial, industrial, and residential roof repair scenarios.

As with any roof repair product, surface preparation matters. When using this product on wet surfaces, remove as much standing water as possible before applying the cement. On dry surfaces, apply the product at the recommended thickness and follow all instructions and cautions listed on the official product container and documentation.

Application Guidance

When applying BULLDOG® Wet Surface Roof Cement #78AF to wet surfaces, remove as much water as possible from the repair area first. Apply the product with a trowel using firm pressure to help ensure a secure bond. On wet surfaces, use enough material to stop the leak. On dry surfaces, the Product Data Sheet recommends applying the roof cement at a rate of 1/8 inch thickness. At that rate, one gallon covers approximately 13 square feet.

Air intakes should be covered before application and while the product is curing. This is especially important on occupied buildings where vapors, fumes, or odors could migrate indoors. Always follow the official Product Data Sheet, Safety Data Sheet, container label, and job-site safety requirements before use.

Coverage, Dry Time, and Performance Notes

At the recommended dry surface application rate of 1/8 inch thickness, one gallon of BULLDOG® Wet Surface Roof Cement #78AF covers approximately 13 square feet. The Product Data Sheet lists a dry film thickness of approximately 77 mils when applied at 13 square feet per gallon. The dry time at the recommended application rate is listed as approximately 3 days for the outside shell. Service temperature is listed from -30°F to +150°F.

Typical physical characteristics include 78.0% nonvolatile matter by weight, 22.0% volatile solvent by weight, 61.5% asphalt solids by volume, net weight of 8.7 pounds per gallon, and a minimum flash point of 104°F according to ASTM D93. The product is also listed as having no sagging or blistering at 60°C under ASTM D4586 and no cracking or separation at 0°C under ASTM D4586.

Available Container Sizes

BULLDOG® Wet Surface Roof Cement #78AF is available in multiple container sizes for different job requirements. Approximate shipping weights listed on the Product Data Sheet include 55-gallon drums at 512 pounds, 5-gallon pails at 46 pounds, and 1-gallon pails packaged six to a carton at 56 pounds.

• 55-gallon drum
• 5-gallon pail
• 1-gallon pail, 6 per carton

Storage, Handling, and Safety Summary

BULLDOG® Wet Surface Roof Cement #78AF should be handled with care and used only with adequate ventilation. The Safety Data Sheet identifies the product as a flammable liquid and vapor and notes that it may cause skin irritation, serious eye irritation, and health effects through prolonged or repeated exposure. Users should keep the product away from heat, sparks, open flames, and hot surfaces, and should not smoke near the product.

Recommended personal protection includes protective gloves, eye protection, and face protection. The SDS also advises users not to breathe mist, vapors, or spray, and not to get the product in the eyes, on the skin, or on clothing. In case of contact, follow the first aid instructions listed in the Safety Data Sheet and seek medical attention when symptoms persist or exposure is a concern.

For storage, keep containers tightly closed in a well-ventilated area. Store the product away from heat, sparks, flame, direct sunlight, and strong oxidizing agents. The SDS also notes that empty containers may retain residue and vapors, so they should not be cut, welded, drilled, ground, pressurized, or exposed to ignition sources.

Cleanup

Tools may be cleaned with mineral spirits or #99 BULLDOG Asphalt Remover, according to the Product Data Sheet. Cleanup should be performed safely, with attention to ventilation, skin protection, and all applicable job-site handling requirements.

Why Choose Palmer Asphalt and BULLDOG® Roof Products?

Palmer Asphalt Company has been serving the roofing industry since 1932, manufacturing roof coatings, roof cements, primers, adhesives, and specialty roofing products under the trusted BULLDOG® name. BULLDOG® Wet Surface Roof Cement #78AF reflects the company’s focus on practical roof repair products that help contractors, property managers, and building owners respond quickly when leaks and roof problems appear.

For distributors, contractors, and facility teams, BULLDOG® roof repair products offer a familiar and reliable option for roof maintenance, leak response, and repair planning. With product documentation, safety guidance, and technical support available from Palmer Asphalt, customers can make more informed decisions before selecting the right roof cement, roof coating, or roof restoration system for the job.

Need Help Choosing the Right BULLDOG® Product?

Not every roof leak requires the same repair approach. Roof condition, surface type, weather exposure, existing materials, and long-term maintenance goals all matter. Palmer Asphalt can help property owners, facility managers, and contractors evaluate roof conditions and determine which BULLDOG® product may be appropriate for the repair.

Request a Free Roof Analysis to get guidance on your roof repair needs and identify the right Palmer Asphalt or BULLDOG® solution for the project.

Frequently Asked Questions

What is BULLDOG® Wet Surface Roof Cement #78AF used for?

BULLDOG® Wet Surface Roof Cement #78AF is used for emergency roof leak repair on wet or dry surfaces. It is designed to adhere to asphalt, metal, and masonry surfaces and may be applied to vertical or horizontal repair areas.

Can BULLDOG® Wet Surface Roof Cement #78AF be applied to wet surfaces?

Yes. BULLDOG® Wet Surface Roof Cement #78AF is specifically designed for wet surface roof repairs. The Product Data Sheet states that it provides 100% wet surface adhesion when tested in accordance with ASTM D3409.

How much area does one gallon cover?

On dry surfaces, one gallon covers approximately 13 square feet when applied at the recommended 1/8 inch thickness.

What surfaces can this roof cement be used on?

BULLDOG® Wet Surface Roof Cement #78AF may be used on asphalt, metal, and masonry surfaces. It can be applied to both vertical and horizontal repair areas.

How long does BULLDOG® Wet Surface Roof Cement #78AF take to dry?

The Product Data Sheet lists the dry time at the recommended application rate as approximately 3 days for the outside shell.

What ASTM specification applies to this product?

BULLDOG® Wet Surface Roof Cement #78AF is listed as meeting ASTM D4586, Type I, Class II.

What safety precautions should be followed?

Users should wear protective gloves, eye protection, and face protection, use the product with adequate ventilation, avoid breathing vapors or spray, and keep the product away from heat, sparks, open flames, and hot surfaces. Always review the full Safety Data Sheet before use.

Where can I get help selecting the right roof repair product?

Palmer Asphalt offers a Free Roof Analysis to help property owners, contractors, and facility managers identify the right BULLDOG® roof repair or roof coating product for the project.