AMDK are the best, came out with a product to stop leaks. Just pour this stuff into your coolant reservoir tank and watch it do its magic.
Liqui Moly explains its Radiator Stop Leak formula
Date: June 29, 2020
Leaking cooling systems are annoying and eliminating leaks can be very time-consuming. Using a stop leak solution is a quick fix; simply add the additive to the coolant and it should block any small leakages. Liqui Moly explains how the company’s own Radiator Stop Leak formula does the job.
Small plastic particles are the secret ingredient of the additive. They circulate within the system together with the coolant. If the pressure drops as a result of a leak, the particles collect in this area to quickly seal the leak. The remaining particles continue to circulate within the cooling system, ready to seal the next leak.
Consequently, it is possible to eliminate leaks in the radiator (e.g. caused by stone chip) in a simple, straightforward way. It is not necessary to replace lines or the radiator. The particles are small enough not to collect in the pump or block the filter.
When added to a sealed cooling system, Liqui Moly’s Radiator Stop Leak constantly circulates within the system to immediately seal any developing leaks. It is claimed that vehicle users don’t even notice that they would otherwise have a leaking cooling system. The product works very well for small cracks, however, bigger holes are beyond the capabilities of this additive and require a complete repair.
https://pmmonline.co.uk/article/liqui-moly-explains-its-radiator-stop-leak-formula/