The Rubberseal Upstand Trim External Corner is engineered to provide a precise, professional finish at external corners within EPDM flat roofing systems.

Corners are one of the most vulnerable points on any flat roof perimeter. Incorrectly cut or poorly aligned trims can create gaps, stress points or aesthetic inconsistencies.

This ready-made external corner removes that risk.

Designed to connect:

Two kerb (upstand) trims at a 90° external corner

A kerb trim and a drip trim at a 90° external corner

It ensures:

Clean alignment

Watertight detailing

Structural stability

A polished, professional appearance

By eliminating complex on-site cutting and mitring, installation becomes faster, more accurate and more reliable.

Used alongside the full range of Rubberseal trim components, this corner piece enhances both the performance and appearance of your flat roof system.