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Aluminium Half Round Gutter – Union Joiner

Create a smooth, secure gutter connection that keeps rainwater flowing and leaks out.

The Aluminium Half Round Gutter – Union Joiner is designed to connect two gutter sections with a watertight seal and a flush, professional finish. Manufactured from high-quality aluminium and coated for extra protection, this joiner ensures reliable performance in all weather conditions. Whether you're building a new system or repairing an existing one, it's an essential component that helps maintain a clean, continuous water flow along your roofline. It fits perfectly with Online Metal Store's full half round gutter range. 

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

£13.74
excluding shipping cost excl. VAT £11.45
In stock
Download Colour Chart

Features + Benefits

  • Provides a seamless connection between two gutter sections

  • Lightweight and corrosion-resistant aluminium construction

  • Powder-coated for durability and colour stability

  • Fire-rated A2-s1,d0 for full building compliance

  • Quick to install with compatible fittings

  • Suitable for residential and commercial gutter systems

  • Low maintenance and long-lasting

  • 100% recyclable and made in the UK

Specs & Options

  • Material: 1050A Grade Aluminium

  • Finish: Polyester powder-coated (RAL/BS colour options)

  • Fire Rating: A2-s1,d0

  • Use: Union for half round gutter sections

  • Lead Time: 3 to 5 working days

  • Custom Options: Bespoke sizes and colours available upon request

Installation / Usage Instructions

Position the joiner between the ends of two gutter lengths. Apply a bead of aluminium-compatible sealant on both sides. Press into place and secure using standard fixings or clips for a watertight finish.

Building or upgrading a half round gutter system? 

This union joiner gives you a clean connection that lasts. Order now or contact Online Metal Store for technical guidance.