Spent a lot of time researching. Do I get a new radiator or do I put some sort of liquid in with the coolant that claims to stop leaks. Some said these liquids were really good and fixed the problem whereas others advised that they were dangerous and could clog the engine. I tried to find a brand and reviews that put up a robust argument that their specific product not only fixed leaks but also did not clog up engines. This product and brand came top of my research - even a video about why these type of liquids may clog engines - they had thought about it and designed a product so that, if used properly, their product would be safe. I could not find this Bars Leak Product in UK so had a shipped over from Canada. It took about 3 weeks to get here. Instructions easy. Easy job. So far - everything is great. The leak stopped straightaway. Admittedly we are only 3 weeks in. This company give you confidence that they know their stuff. Bars leak have been around for ages and the US military use their products.