Aluminium Box Internal Stopend

Seal your box gutter from the inside with a precision-fit stopend that keeps water in and worry out.

The Aluminium Box Internal Stopend is designed to close off the internal end of a box gutter run, creating a watertight finish that prevents leaks and overflows. Engineered from strong 1050A-grade aluminium, it's made to match our full range of box gutter sizes and ensure easy installation with long-term reliability. With a powder-coated finish in your choice of RAL or BS colour, this stopend delivers both function and a clean, professional look.

Please refer to the attached RAL colour chart to view available options. At checkout, enter your chosen RAL colour in the designated box.

Choose a variant:

Size

£10.50

excluding shipping cost

Download Colour Chart

Features + Benefits

Provides a sealed internal termination for box gutter runs
Designed for a perfect fit with standard gutter profiles
Made from lightweight yet strong aluminium
Resistant to rust, weather, and long-term wear
Powder-coated for protection and a clean finish
Available in all RAL/BS colour options
Fire-rated A2-s1,d0 for safety compliance
Ideal for both new builds and refurbishments
100% recyclable and manufactured in the UK
Quick and simple to install

Specs & Options

Material: 1050A Grade Aluminium
Finish: Polyester powder-coated (RAL/BS colours)
Available Sizes:
- 100mm sole x 75mm upstand
- 125mm sole x 100mm upstand
- 150mm sole x 100mm upstand
Fire Rating: A2-s1,d0
Lead Time: 3 to 5 working days
Use Case: Internal gutter termination
Custom Options: On request

Installation / Usage Instructions

Insert the internal stopend into the box gutter profile and secure using aluminium-compatible sealant or fixings. Check for alignment and ensure a watertight seal is maintained. Install at the start or end of a gutter run where internal termination is needed.

Need a clean and secure way to cap your gutter internally?