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Fernox F4 Express Leak Sealer 265ml

Product Code: 61837

You Must Be Over 18 Years Of Age To Purchase This Product.

Internal leak sealer, stops small leaks. Treats up to 10 radiators. Quick and convenient, doses in only 30 seconds. Ideal for reducing pressure loss from sealed systems. Seeks out and seals most weeps and leaks.

Product contents:
Radiator and filling loop adaptors.

Delivery unavailable for any offshore location.

pH (concentrate): 5.0-7.0.

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Safety Data Sheet (COSHH)




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Fernox F4 Express Leak Sealer 265ml 5 5 2 2
Easy to use The product was very easy to use, connected straight on to the filling loop. Just hope it does what it is supposed to now it's in the water 14 Jan 2015
Leak fix Used 2 cans of this as we have well over 20 rads on our system to fix a internal leak in our oil fired boiler and it worked perfect.. Within two days there was no leak at all and the leak was more than a tiny one. With it been winter we did not want to be without a boiler so thought this product was great and easy to inject into the system. 14 Jan 2015
  • 2015-08-27T15:33:59.586-05:00
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Download more info (pdf)

Brand Fernox
Colour Green / Blue
Manufacturer Guarantee 10 years
Model No F4 Express
Pack Size 1
Product Depth 50 mm
Product Height 210 mm
Product Type Leak Sealer
Product Width 50 mm
Sealant Adhesive Volume 265 ml
Total Product Weight 389 kg