Nulon Radiator & Engine Block Stop Leak is a simple solution to sealing coolant leaks in inlet manifolds, radiators, heater cores, gaskets and welch plugs without expensive mechanical repairs. Formulated with DuPont™ Kevlar® fibre & liquid resin, Nulon Radiator & Engine Block Stop Leak provides a strong, long lasting repair to permanently seal Radiator, engine block and other cooling system leaks. The microfiber technology is designed to seek out even the smallest of leaks to provide a strong, permanent repair to prevent overheating and coolant loss. Nulon Radiator & Engine Block Stop Leak won’t harm aluminium, plastic, metal or copper and is also compatible to mix with all glycol and water based coolants. 1 bottle of Nulon Radiator & Engine Block Stop Leak will suit most regular size cooling systems up to 15L.

Whilst this product is designed to repair minor issues, it may not be a suitable repair method for moderate or large issues, and may cause further problems in some circumstances. Before use, if you are unsure please check with your mechanic to ensure that this product provides a suitable repair for your issue