
£2.62
The Rubberseal Upstand Trim External Corner is a pre-formed corner piece designed to provide a clean, watertight finish where two upstand trims meet — or where an upstand connects to a drip trim at an external corner.
The Upstand Trim External Corner is a pre-moulded component designed for use with Rubberseal upstand trims, ensuring a precise and watertight finish at external corners. It eliminates the need for on-site cutting or complex sealing, simplifying installation while maintaining a professional, consistent appearance.
Manufactured from durable, UV-resistant PVC, the external corner provides long-lasting protection against water ingress and movement at joint intersections. It ensures a smooth transition between trims, enhancing both performance and visual finish.
Colour: Black
Height: 94 mm
Width: 50 mm
Depth: 50 mm

Rubberseal is a UK-based brand supplying proven EPDM and flat roofing systems for residential and commercial builds. Known for quality and flexibility, their solutions are backed by industry experience and training.
