Everbuild 903 Black Jack Bitumen Trowel Mastic 5ltr

The Everbuild 903 Black Jack Bitumen Trowel Mastic is a ready-to-use, heavy-duty repair compound supplied in a 5 litre tub. Specially formulated for filling, sealing, and patching roofs, gutters, pipes, and other external structures, it provides a flexible, long-lasting, and weatherproof finish.

Product Features/Specifications:

This bitumen-based mastic can be applied with a trowel or knife to most common building surfaces including roofing felt, asphalt, metal, concrete, and brickwork. Its thick, putty-like consistency makes it ideal for emergency repairs and gap filling, even on vertical surfaces.

Detailed Product Benefits:

The Everbuild 903 Black Jack offers excellent adhesion, creating a strong, flexible seal that withstands harsh weather conditions. It is resistant to rain, frost, and standing water, making it a reliable choice for outdoor maintenance. Unlike standard mastics, it retains elasticity, allowing it to accommodate slight surface movements without cracking.

The large 5 litre tub ensures ample coverage for larger repair jobs, reducing the need for multiple containers.

Applications and Versatility:

• Emergency roof leak repairs
• Filling cracks, gaps, and joints in roofing felt and asphalt
• Sealing around guttering, downpipes, and roof vents
• Repairing cracks in brickwork, concrete, and chimney stacks
• Suitable for both domestic and commercial roofing maintenance

Features & Benefits List:

• Heavy-duty trowel-applied mastic
• Excellent adhesion to most common surfaces
• Remains flexible – resists cracking and movement
• Weatherproof and water-resistant
• Ideal for roofing, guttering, and external masonry repairs
• Supplied in a large 5 litre tub for bigger projects
• Suitable for trade and DIY applications

Technical Specifications:

• Product Code: Everbuild 903 Black Jack Trowel Mastic
• Formulation: Bitumen-based, oil-based compound
• Colour: Black
• Pack Size: 5 litres
• Application Method: Trowel or knife
• Use: Roofing, guttering, masonry, and general external repairs

Additional Information:

Apply only to clean, dry surfaces free from dust, grease, or loose materials. Not suitable for use in areas subject to solvent or oil contact. Store in a cool, dry place with the lid tightly closed. Always follow manufacturer’s guidelines for safety and handling.

For more information please contact us on 01274 720227 or email us at [email protected]