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Adheres to most wet or dry surfaces Screwfix customers rate this product 4.7/5 Does not shrink and remains flexible, allowing seal to be undone
Free next day delivery available, free collection in 1 minute. Order fernox f4 central heating leak sealer 500ml at screwfix.com Quickly and permanently seals and prevents heating system leaks
Suitable for both open and closed systems
Does not clog, enhances pump lubrication and prevents rust and corrosion Helps to make watertight seals for leaking pipes or waterproofing Suitable for jointing, splicing and repairing cables, hoses, plastic and metallic tubes. Buy central heating leak sealers at screwfix.com
Seal plumbing leaks & improve system pressure Click & collect in hundreds of stores. Buy sealers & compounds at screwfix.com 60 days free credit available
Apple pay accepted in store
Uk call centre ready for your call 24/7 Buy online & collect in hundreds of stores in as little as 1 minute! Buy sealers & compounds at screwfix.ie Google pay and apple pay are accepted in store
Silicone paste used as an external leak sealer and jointing compound Provides seal without setting hard, allowing joints to be undone later Easy to apply and clean up Suitable for compression and screw fittings
Safe to use with drinking water
Internal leak sealer for small inaccessible leaks and weeping joints in all types of indirect heating systems including those containing aluminium components
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