cooling system stop leak FEATURES 1)this product is a permanent sealer for high-pressure cooling system in cars,trucks andtractors. radiator stop leask and sealer meets all car and truck manufactures' requirements.lt lubricantes water pumps,neutralizes acids and trats entire cooling system and so on! 2)when the engine becomes cool,open the water tank and fill water tank is almost full,fill this sealer into it,then start and keep the engine running until the leaking stopperd,then cover the tank SPECIFICATION 355ml/ CAN ,24PCS/CTN,33*32*18CM