Nulon Radiator & Engine Block Stop Leak 500ml with DuPont™ Kevlar® fibre & liquid resin provides the ultimate strong long lasting fix. Formulated to permanently seal radiator leaks, inlet manifolds and engine block leaks, cracks, leaking welch plugs and leaking gaskets without costly mechanical repair. This unique microfibre technology seeks out and plugs small leaks and cracks that cause coolant loss, loss of pressure and overheating. 

The DuPont™ Kevlar® fibres mesh and plug the leak or crack which are then encased in a hardened liquid glass resin for the ultimate permanent water tight seal.

Nulon Radiator & Engine Block Stop Leak can be safely used in cars, trucks, vans, utes, and light commercial vehicles. Safe for all plastic, aluminium and metal (copper / steel) radiators, heater cores, gaskets and welch plugs. Safe to use with all types and colour of glycol anti-freeze/anti-boil and water based coolants.

Benefits

• Seals radiator and inlet manifold leaks and cracks, welch plugs and leaking gaskets and pipe leaks fast
• Contains DuPont™ Kevlar® fibre and liquid glass resin for the ultimate permanent water tight seal
• Stops leaks from small pinholes (up to 0.8mm diameter) and small cracks (up to 0.8mm width) in any cooling system
• Saves costly mechanical repairs
• Maintains cooling system pressure and temperature to prevent overheating
• Safe to use with all types of glycol anti-freeze/anti-boil coolants and water based corrosion inhibitors