• OPEN BOX: This product is a fully inspected customer return
• Professional jointing compound for plumbing and heating: Fernox Water Hawk seals metal or plastic pipe threads in hot or cold water, central heating and gas lines, giving reliable leak protection on first fix
• WRAS approved non-toxic plumbers paste: Safe for potable water systems and food service areas, this odour-free leak sealer replaces plumbers mait, putty and liquid PTFE without tainting taste or smell
• Smooth, easy application with excellent adhesion: Thick yet spreadable consistency coats threads evenly, filling small gaps and forming a water-resistant seal without special tools or excessive effort
• Corrosion-resistant water sealant: Formulated to resist chemical attack and rust, protecting pipe threads and fittings so joints stay serviceable and leak-free for the long term
• Versatile pipe thread sealant for multiple materials: Bonds securely to copper, brass, steel, PVC and ABS fittings, making it an ideal pipe sealant for leaking water pipes, valves, radiators and compression joints
• Durable 400g trade tin for repeated use: Resealable metal container keeps compound fresh between jobs, providing ample plumbers paste for maintenance, emergency leak repairs and new installations

PLEASE NOTE: This item is a customer return that has been fully inspected by the Lava team and carries a 30 day Lava guarantee or the manufacturer's original warranty (if applicable) - whichever is longer.

Fernox Water Hawk is a non-setting jointing compound for plumbing that helps create durable water seals on threaded pipe joints in domestic and commercial systems. This WRAS approved plumbers paste is suitable for both hot and cold potable water as well as 1st and 2nd family gases including Natural Gas, and can be used as a leak sealer or pipe thread sealant across a wide range of fittings and materials.

Its corrosion-resistant formula protects metal threads from rust and chemical attack, making it ideal for long-term installations. Whether you're sealing radiator valves, compression joints, or gas line connections, Water Hawk spreads easily to form a flexible, watertight barrier that resists shrinkage and cracking over time.

Fernox Water Hawk can be used as an alternative to traditional putty or liquid PTFE. Unlike these methods, this compound stays soft, enabling future disassembly of joints without damage. Supplied in a durable 400g tin, it stays fresh between uses and is suitable for professional or DIY applications.