Product Description

EVERBUILD® BLACK JACK® 903 Bitumen Trowel Mastic is a premium, trowel-applied, black bituminous compound designed for tough repair jobs. Reinforced with added fibres, this thick, fast-drying mastic creates a durable surface skin while remaining soft and flexible underneath—perfect for surfaces that experience moderate movement.
Ideal for sealing and filling holes in a wide range of materials including mastic asphalt, roofing felt, corrugated iron, metal guttering, downpipes, and more.

Key Features:

• Fast Drying: Quick application with minimal downtime.
• Fibre-Reinforced: Enhanced strength for reliable, long-lasting repairs.
• Flexible & Resilient: Stays soft beneath the surface to accommodate slight movement.
• Wide Compatibility: Adheres to all common bituminous coatings and construction materials.
• Versatile Use: Perfect for waterproofing, bonding, sealing, stopping and bedding tasks.

Compatible With:

• Mastic asphalt
• Roofing felt
• Corrugated iron
• Cast iron
• Fibre cement
• Slates
• Lead
• Copper
• Zinc
• Concrete
• Timber

Flashpoint: 50°C
Finish: Tough, black protective coating