Minor radiator leaks can be temporarily fixed by pouring metal flakes from a product called Bar’s Leak into the radiator. Use epoxies from local auto parts stores to fix a radiator leak with help from an auto mechanic in this free video on car repair and diagnostics. Expert: Tom Brintzenhofe Bio: Tom Brintzenhofe has been a mechanic for more than 17 years. Filmmaker: Reel Media LLC