Fernox F4 Leak Sealer 500Ml
by Fernox
£24.00
GTIN05014551566033
EAN5014551566033
MPN5014551566033
Prices updated 5 Apr 2026
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Product Description
Seal small, inaccessible leaks and weeps in a central heating system with Fernox F4 Leak Sealer. There is no need to drain down the system before use, and once dispersed, it will be effective 1 to 24 hours after application.
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