BULLDOG® Heavy Duty Flashing Cement #75AF

BULLDOG Heavy Duty Flashing Cement #75AF is a heavy trowel-grade asphalt roofing mastic designed for flashing work, roof repairs, and leak-stopping applications on clean, dry surfaces. Manufactured by Palmer Asphalt Company, this heavy-duty flashing cement is blended from high-grade asphalt, petroleum spirits, mineral fillers, and stabilizers to create a durable roof repair material that resists running and sagging at high temperatures.

This product is especially useful for vertical roof repair applications where standard roof cement may be difficult to control. BULLDOG® Heavy Duty Flashing Cement #75AF forms a tough outside shell while remaining soft and pliable underneath, making it a practical choice for roof flashing maintenance, asphalt roof repair, and general leak control around common roof penetration points.

What BULLDOG® Heavy Duty Flashing Cement #75AF Is Used For

BULLDOG® Heavy Duty Flashing Cement #75AF is especially prepared for application to vertical surfaces. It is commonly used to install, maintain, and repair flashing around parapet walls, skylights, vents, chimneys, ducts, flues, and similar roof details where leaks often begin.

This product is also useful as an all-purpose roof cement for repairing cracks, splits, and blisters on asphalt roofs. It can be used on metal surfaces and masonry surfaces, giving contractors, property managers, facility teams, and building owners a versatile repair option for roof maintenance and leak response.

For improved preparation, surfaces may be primed with BULLDOG® Asphalt Primer before applying the cement. For cracks, splits, and blisters on built-up roofing, BULLDOG® Heavy Duty Flashing Cement #75AF may be used with BULLDOG® Asphalt Saturated Cotton Fabric or Polyester Fabric.

Common Applications

• Flashing installation, maintenance, and repair
• Parapet wall flashing repairs
• Skylight flashing repairs
• Vent flashing repairs
• Chimney flashing repairs
• Duct and flue flashing repairs
• Crack repair on asphalt roofs
• Split and blister repair on built-up roofing systems
• Metal surface roof repairs
• Masonry surface roof repairs
• Vertical roof cement applications
• General roof leak repair and maintenance

Key Features and Benefits

BULLDOG® Heavy Duty Flashing Cement #75AF is built for roof repair situations where a heavier-bodied flashing cement is needed. Its trowel-grade consistency helps the material stay in place during application, especially on vertical surfaces and roof details that require better placement control.

• Heavy-duty flashing cement: Designed for roof flashing repair, maintenance, and leak control.
• Heavy trowel-grade consistency: Helps support controlled application on roof surfaces.
• Prepared for vertical surfaces: Useful around parapet walls, skylights, vents, chimneys, ducts, and flues.
• Resists running and sagging: Designed to perform in high-temperature roof conditions.
• All-purpose roof repair use: Helps repair cracks, splits, and blisters on asphalt roofs.
• Multi-surface application: May be used on asphalt roofs, metal surfaces, and masonry surfaces.
• Flexible repair profile: Forms a tough outside shell while remaining soft and pliable underneath.
• Seasonal consistency: Adjusted for seasonal use.
• ASTM specification: Meets ASTM D4586, Type I, Class I.

Recommended Surfaces

BULLDOG® Heavy Duty Flashing Cement #75AF may be used on asphalt roofs, metal surfaces, and masonry surfaces. It is especially useful for vertical repair areas and roof flashing details where reliable placement and sag resistance are important.

Before applying this roof cement, the surface should be clean and dry. Loose ends and boards should be re-nailed before application. When appropriate, BULLDOG® Asphalt Primer may be used prior to applying the cement to support the repair process.

Application Guidance

Use a trowel to apply BULLDOG® Heavy Duty Flashing Cement #75AF to a clean, dry surface. Apply the product at approximately 1/8 inch thickness. At this recommended application rate, one gallon covers approximately 13 square feet.

For repairing cracks, splits, and blisters on built-up roofing, use this flashing cement with BULLDOG® Asphalt Saturated Cotton Fabric or Polyester Fabric. This added reinforcement can help support the repair area and improve the overall repair system.

Air intakes should be covered before applying the product and while the product is curing. This is important on occupied buildings because vapors, fumes, or odors may migrate through open air intakes, windows, doors, or other building openings.

Coverage, Dry Time, and Performance Notes

At the recommended application rate of 1/8 inch thickness, one gallon of BULLDOG® Heavy Duty Flashing Cement #75AF covers approximately 13 square feet. The product has a listed dry film thickness of approximately 77 mils when applied at 13 square feet per gallon.

The dry time at the recommended application rate is approximately 3 days for the outside shell. Service temperature is listed from -30°F to +150°F, making this product suitable for a wide range of roof repair and maintenance conditions.

Typical physical characteristics include 79.0% nonvolatile matter by weight, 21.0% volatile solvent by weight, 19.0% mineral filler and/or stabilizers by weight, 61.0% asphalt solids by volume, 0.05% water content by volume, and a net weight of 8.7 pounds per gallon.

BULLDOG® Heavy Duty Flashing Cement #75AF 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. These performance characteristics help support its use as a heavy-duty roof flashing cement for detail work, vertical applications, and asphalt roof repair.

Specifications

• Product Number: #75AF
• Product Type: Heavy-duty flashing cement
• Category: Roof Cements
• Application Method: Trowel
• Recommended Application Thickness: Approximately 1/8 inch
• Coverage: Approximately 13 square feet per gallon
• Dry Time: Approximately 3 days for outside shell
• Service Temperature: -30°F to +150°F
• ASTM Specification: ASTM D4586, Type I, Class I
• Federal Specification: SS-C-153 Type 1, except non-asbestos

Available Container Sizes

BULLDOG® Heavy Duty Flashing Cement #75AF is available in common job-site sizes for roof repair, flashing maintenance, and leak control work.

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

Storage, Handling, and Safety Summary

BULLDOG® Heavy Duty Flashing Cement #75AF should be handled carefully and used only with adequate ventilation. The Safety Data Sheet identifies the product as a flammable liquid and vapor. It may cause skin irritation, serious eye irritation, and health effects through prolonged or repeated exposure.

Users should keep this product away from heat, sparks, open flames, hot surfaces, and other ignition sources. Do not smoke near the product. Protective gloves, eye protection, and face protection should be worn when handling or applying the material.

Avoid breathing mist, vapors, or spray. Avoid contact with eyes, skin, and clothing. If skin contact occurs, wash with soap and water. If eye contact occurs, rinse carefully with water and seek medical attention if irritation persists. If swallowed, do not induce vomiting and seek immediate medical attention.

Store containers tightly closed in a cool, dry, well-ventilated area. Keep the product away from direct sunlight, strong oxidizing agents, heat, sparks, and flame. Empty containers may retain residue and vapor, 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. Cleanup should be completed with proper ventilation, skin protection, and safe handling practices. Always follow the product label, Product Data Sheet, Safety Data Sheet, and applicable job-site safety requirements.

Why Choose Palmer Asphalt and BULLDOG® Roof Products?

Palmer Asphalt Company has served the roofing industry since 1932 with roof cements, asphalt roof coatings, primers, adhesives, and specialty roofing products under the BULLDOG® name. BULLDOG® Heavy Duty Flashing Cement #75AF reflects that practical roofing legacy with a heavy-bodied repair product designed for common roof leak points and flashing maintenance needs.

For contractors, distributors, facility managers, and property owners, BULLDOG® roof cements provide dependable options for roof repair, flashing maintenance, and leak response. With clear product documentation and support from Palmer Asphalt, users can make better decisions when selecting a roof cement, asphalt primer, roof coating, or complete roof restoration system.

Need Help Choosing the Right BULLDOG® Product?

Every roof repair has its own conditions. Surface type, roof age, flashing condition, weather exposure, existing roof materials, and long-term maintenance goals all affect which product should be used. Palmer Asphalt can help property owners, facility managers, and contractors evaluate roof conditions and identify the right BULLDOG® product for the job.

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® Heavy Duty Flashing Cement #75AF used for?

BULLDOG® Heavy Duty Flashing Cement #75AF is used for flashing installation, flashing repair, roof leak repair, and general roof maintenance. It is especially useful around parapet walls, skylights, vents, chimneys, ducts, flues, and other common roof leak points.

Can BULLDOG® Heavy Duty Flashing Cement #75AF be used on vertical surfaces?

Yes. BULLDOG® Heavy Duty Flashing Cement #75AF is especially prepared for application to vertical surfaces, making it useful for flashing repairs and roof details that require a heavier-bodied cement.

What surfaces can this flashing cement be used on?

This flashing cement may be used on asphalt roofs, metal surfaces, and masonry surfaces. Surfaces should be clean and dry before application.

How much area does one gallon cover?

One gallon covers approximately 13 square feet when applied at the recommended 1/8 inch thickness.

How long does BULLDOG® Heavy Duty Flashing Cement #75AF take to dry?

The dry time at the recommended application rate is approximately 3 days for the outside shell.

Should this product be used with fabric?

For repairing cracks, splits, and blisters on built-up roofing, this product may be used with BULLDOG® Asphalt Saturated Cotton Fabric or Polyester Fabric.

What ASTM specification applies to this product?

BULLDOG® Heavy Duty Flashing Cement #75AF meets ASTM D4586, Type I, Class I. It is also listed under Federal Specification SS-C-153 Type 1, except non-asbestos.

What safety precautions should be followed?

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

Can Palmer Asphalt help select the right roof repair product?

Yes. 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.