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Knowledgeable & Helpful Team
Free Nationwide Delivery | 30 Day Returns Policy | Knowledgeable & Helpful Team

Fernox Leak Sealer F4 Express 400ml

SKU: 62422

£30.53 inc. VAT

• Delivery 1-5 days
• Free nationwide delivery
• 30 day return policy

• Delivery 1-5 days
• Free nationwide delivery
• 30 day return policy

Qty:

Description

Leak Sealer F4 is an internal leak sealer developed for use throughout a central heating system to seal small, inaccessible leaks and weeps, which may cause pressure loss and boiler breakdown. Once dispersed within the system, the product finds the area of oxygen ingress and forms a polymer to seal the pinhole. Effective within 1-24 hours after application, the unique sealing efficiency of this market-leading water treatment chemical has been proven to prevent blockages or restrictions within the boiler or vulnerable system components such as pumps and safety devices. A leak can be quickly and efficiently sealed without the need for a complete system drain down. The Fernox Express range uses Barrier Pressure Pack technology and compressed air propellant to expel the product, so the entire range is non-flammable. The propellant (compressed air) is not mixed with the active product, so there is no risk of air ingress into the system, which could accelerate the future risk of corrosion.

Please always refer to the manufacturer's instructions for the correct application. All parts should be fitted by a qualified plumber.

We know you’re busy and need to get repair jobs done quickly and efficiently. Our experts are waiting to help you with your plumbing, heating, or bathroom project. UK Plumbing is the UK's favourite supplier of plumbing and heating materials. We strongly value trust, reliability and always deliver excellent service for a fair price.

Product features:

• Seeks out and seals inaccessible. Internal microscopic leaks fast
• Quick and convenient – doses in 30 seconds – no need to drain down the system
• Safe to use – does not cause blockages in pipework or vulnerable boiler components such as pumps, air vents, and heat exchangers
• Non-toxic, environmentally friendly formulation, compressed air propellant, and 100% recyclable can
• Saves time and money on draining down and repairing.
• Add via a radiator, filling loop, or TF1 System Filter – all adapters supplied

Additional information

Download Technical Data SheetSafety Data Sheet
Brand

Fernox

Manufacturer Code

62422

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Delivery cost

Delivery is free on all orders. We deliver all around the UK using DHL and Parcelforce. Standard delivery will take 1-5 working days to reach you. However, once the order is received, we will contact you to give you a more precise timescale. Usually, we will deliver the next day, subject to the date and time of when the order is received and the product.

Orders placed during the weekend will be processed the following Monday for delivery the following day. In the case of Bank Holidays, your order will be processed the next working day and delivered the following working day.

Remote areas: For orders to some addresses, especially in the Highlands of Scotland and Offshore, next day delivery options are not available, and delivery can take several days. Saturday delivery is unavailable for these areas.