Everbuild 903 Black Jack Bitumen Trowel Mastic 1 Litre - 90301

Everbuild 903 Black Jack Fibre Reinforced Trowel Repair Mastic 1 Litre 90301

Barcode: 5029347009311

Sika Code: 486987

MPN: 90301

Colour: Black

Size: 1 Litre

Everbuild 903 Black Jack Bitumen Trowel Mastic 1 Litre

1 Litre Tin of trowel applied black heavily filled fibre re-enforced bituminous repair compound it has a multitude of applications but it primarily used for patching holes in roofs and bituminous coatings. The product forms a surface skin, but the mass below remains soft to allow for reasonable movement, trowel mastic is suitable for sealing and filling holes in mastic asphalt, roofing felt, corrugated iron, metal guttering and downpipes and troublesome roof repair areas.

The Everbuild 903 Black Jack Bitumen Trowel Mastic in a 1-litre container is a versatile, high-performance sealant designed for repairing and waterproofing a wide range of surfaces. Its thick, trowel-grade consistency makes it ideal for filling gaps, cracks, and joints in roofs, gutters, chimneys, and flashings.

This bitumen-based mastic is easy to apply with a trowel and forms a durable, weatherproof seal that resists water ingress and harsh environmental conditions. Whether for professional use or DIY repairs, this mastic provides reliable and long-lasting results.

Key Benefits:

• Thick, Trowel-Grade Consistency: Perfect for filling large cracks, joints, and voids.
• Weatherproof Protection: Creates a tough, waterproof seal to prevent leaks.
• Versatile Application: Suitable for roofs, gutters, chimneys, and more.
• Durable and Flexible: Resists cracking and movement over time.
• Easy to Apply: Designed for application with a standard trowel or spatula.

Everbuild 903 Benefits and Uses: Fast drying and is suitable for use on all bituminous surface coatings remains flexible for long periods after application, Waterproofing, stopping, bedding, bonding and sealing, adheres To and Fills Holes In: Mastic asphalt, roofing felt, corrugated iron, cast iron, fibre cement, slates, lead, copper, zinc, concrete, timber.

Features:

• High Adhesion: Bonds securely to a variety of materials, including concrete, metal, roofing felt, and asphalt.
• Bitumen-Based Formula: Provides excellent water resistance and durability.
• UV Resistant: Maintains integrity and performance under sunlight exposure.
• Ready to Use: No mixing or preparation required for immediate application.

How to Use:

1. Clean the surface thoroughly, ensuring it is dry and free of loose debris.
2. Using a trowel or spatula, apply the mastic directly into cracks, joints, or voids.
3. Smooth and level the surface to ensure complete coverage and a neat finish.
4. Allow the mastic to cure before exposing it to water or heavy use.

Application:

Everbuild Black Jack 903 Bitumen Trowel Mastic is ready for use and should not be thinned. Apply by steel trowel or putty knife.

Cracks and Holes:

Force the compound into the crack finishing with a 25mm band at a 3mm thickness running the length of the crack so your bridging the crack.

For large cracks and holes, apply the compound over the area to be treated and embed a closely woven glass fibre membrane into the compound overlap the crack or hole by 50mm.

Allow to dry and then apply a second coat, fully covering the reinforcing membrane.

Corrugated Iron and Fibre Cement Roofing Sheets

Cracked roof sheets, clean and prime with Bitumen Flashing Primer then apply the trowel mastic.

Product Details:

• Size: 1 litre
• Coverage: Approximately 0.5m² per litre, depending on application thickness.
• Drying Time: Surface dry within 6-8 hours; fully cured in 24-48 hours, depending on conditions.

Why Choose Everbuild 903 Black Jack Bitumen Trowel Mastic?
This trowel-grade mastic is the go-to product for heavy-duty sealing and repair tasks. Its durable, waterproof formula and easy application make it a reliable choice for professionals and DIY users alike.

FAQs About Everbuild 903 Black Jack Bitumen Trowel Mastic 1 Litre

1. What is this mastic typically used for?
   It is ideal for sealing cracks, joints, and voids in roofs, gutters, flashings, and other surfaces.

2. Can it be used on wet surfaces?
   No, the surface must be dry for optimal adhesion and performance.

3. Is it suitable for large gaps or voids?
   Yes, its thick consistency is designed to fill and seal larger areas effectively.

4. Does it require any special tools for application?
   No, it can be applied using a standard trowel or spatula.

5. Can it withstand UV exposure?
   Yes, the mastic is UV resistant and performs well under prolonged sunlight exposure.

6. How long does it take to cure?
   It is surface dry within 6-8 hours and fully cured in 24-48 hours, depending on environmental conditions.

7. What materials can it bond to?
   It adheres securely to concrete, metal, roofing felt, asphalt, and other common building materials.

8. Does it remain flexible after curing?
   Yes, the mastic remains flexible to accommodate minor substrate movements.

9. Can it be painted over?
   It is not recommended to paint over bitumen-based products, as other coatings may not adhere properly.

10. What is the shelf life of this product?
    When stored in a cool, dry place, the mastic has a shelf life of up to 24 months.

Always Read the Official Technical Data sheet prior to use to make sure you have all the details are correct and that there have not been any changes to instructions.

(Please note that tins will get dented in transit and this is not a reason for return please do not purchase tined products if this is an issue for yourself.)