What Is the Best Radiator Stop Leak?
K-Seal Multi-Purpose One Step Coolant Leak Repair is the best radiator stop leak for most older, out-of-warranty vehicles with a small, confirmed cooling-system leak. It works with common coolant types, normally requires no preliminary flush, and can circulate through radiators, heater cores, engine blocks, and other coolant passages—but no stop-leak product is a substitute for […]