Description
Bond It Trowel Mastic 5L
Seal Roof Leaks Fast with a Heavy-Duty Waterproof Mastic
When cracks, splits, or leaks appear, you need a solution that works immediately. Bond It Trowel Mastic 5L is a reliable roofing mastic and waterproof sealant designed to repair and protect roofing surfaces quickly and effectively.
Ideal for both DIY users and professional roofers, it delivers a strong, flexible seal that stands up to harsh UK weather.
Available now at Masseys DIY Store.
Key Benefits
- Instant waterproof seal – ideal for stopping leaks fast
- Thick, trowel-grade consistency – fills gaps, cracks, and joints easily
- Strong adhesion to common roofing materials
- Flexible finish – resists cracking and movement
- Multi-purpose use – suitable for roofs, flashing, and gutters
- Durable protection – withstands rain and weather exposure
- Easy application – simple trowel or knife application
Product Overview
Bond It Trowel Mastic 5L is a high-performance bitumen-based roofing mastic formulated for sealing and repairing roof surfaces. Its thick consistency allows it to be worked directly into damaged areas, forming a robust waterproof barrier that protects against further water ingress.
Designed for reliability in demanding conditions, it is widely used for roof maintenance, repairs, and preventative sealing, making it a go-to solution for both quick fixes and longer-term protection.
Where to Use Bond It Trowel Mastic
Felt Roof Repairs
Seal splits, cracks, and damaged areas in roofing felt.
Flashing and Joints
Protect vulnerable areas around chimneys, skylights, and roof edges.
Cracks and Gaps
Fill and seal structural gaps to prevent water penetration.
Gutters and Drainage
Repair leaking joints and sections in guttering systems.
What Is Trowel Mastic and Why Use It?
Trowel mastic is a thick, bitumen-based roof repair compound designed to seal and waterproof damaged areas.
It is commonly used because it:
- Can be applied directly into cracks and gaps
- Forms a strong waterproof seal
- Adheres to a wide range of roofing materials
- Provides a quick and effective repair solution
👉 Ideal for both emergency fixes and routine roof maintenance.
How It Works
Bond It Trowel Mastic works by creating a sealed, flexible barrier over damaged areas:
- Fills cracks and joints to stop water entry
- Bonds to surfaces to create a watertight seal
- Remains flexible to handle movement and temperature changes
- Protects against rain, frost, and environmental wear
This ensures reliable, long-lasting protection for roofing surfaces.
How to Apply (Step-by-Step)
- Prepare the area
Remove loose debris, dirt, and standing water where possible. - Stir the mastic
Ensure an even consistency before application. - Apply using a trowel or knife
Spread directly onto the damaged area. - Work into cracks and joints
Press firmly to ensure full coverage and adhesion. - Smooth the surface
Level off for a neat, even finish. - Allow to set
The mastic will begin sealing immediately and cure over time.
Technical Specifications
- Product Name: Bond It Trowel Mastic
- Size: 5 Litres
- Type: Bitumen-based roofing mastic
- Application Method: Trowel or knife
- Finish: Flexible waterproof seal
- Primary Function: Sealing and repair of roofing surfaces
- Suitable Surfaces: Felt, flashing, roofing materials, gutters
- Use: External
Frequently Asked Questions
What is Bond It Trowel Mastic 5L used for?
Bond It Trowel Mastic 5L is used to seal and repair roofing surfaces, including cracks, joints, and damaged felt. It creates a waterproof barrier that prevents leaks and protects against weather damage.
Can it fix roof leaks?
Yes. It is designed to quickly seal leaks by filling gaps and forming a durable waterproof layer over the affected area.
What surfaces can it be applied to?
It can be applied to roofing felt, flashing, gutters, and other common roofing materials.
Is it suitable for DIY use?
Yes. Its thick consistency makes it easy to apply with basic tools like a trowel or knife, making it suitable for both DIY users and professionals.
Does it stay flexible after drying?
Yes. Once applied, it remains flexible to accommodate movement and prevent cracking over time.
Complete Your Repair
For best results, pair with:
- Roofing brushes and application tools
- Additional roofing compounds and sealants
- Surface preparation products
Available at Masseys DIY Store.
Why Buy from Masseys DIY Store?
- Trusted UK supplier for roofing and building materials
- Competitive pricing on leading brands
- Ideal for both emergency repairs and maintenance
- Expert advice available in-store
Fix Your Roof Before It Gets Worse
Don’t let minor damage turn into costly repairs.
Order Bond It Trowel Mastic 5L now or visit Masseys DIY Store for fast, convenient pickup.
