Black Mastic for EPDM Rubber Roofing Wall Trim

Waterproof Sealant for EPDM Wall Trim & Brickwork

Black mastic sealant is used to create a watertight seal between metal wall trims and brickwork, sealing the chase out detail on EPDM rubber roofing installations.

It’s applied along the top edge of the wall trim where it meets the brickwork, preventing water ingress behind the trim and ensuring a clean, finished detail that won’t cause problems later.

What This Black Mastic Is Used For

This mastic is commonly used to:

• Seal the chase out between wall trims and brickwork
• Create a watertight seal above EPDM wall trims
• Seal overlapping wall trim joints
• Prevent water tracking behind metal trims

It’s a small detail, but an important one. Without it, water can get behind the trim and cause leaks or damp staining over time.

Application (Simple Overview)

• Supplied in a 300ml cartridge
• Applied using a standard mastic gun
• Run a continuous bead along the chase out above the wall trim
• Tool off for a neat, sealed finish

The mastic is easy to apply and suitable for both professional roofers and competent DIY installers.

Product Details

• Product: Black Mastic Sealant
• Use: Sealing wall trims to brickwork (chase out detail)
• Colour: Black
• Size: 300ml cartridge
• Coverage: Approx. up to 6 linear metres (depending on bead size)
• Application: Mastic gun

Important Note on Branding

This is an unbranded black mastic supplied from trusted manufacturers.
Depending on availability, the cartridge branding may vary, but all supplied mastics perform the same function and are applied in the same way.

Summary

Black mastic sealant is an essential finishing product for EPDM rubber roofing installations, used to seal the gap between wall trims and brickwork. Applied correctly, it completes the waterproofing detail and helps ensure the wall edge on your rubber roof stays watertight and leak free, long after installation.