Review on Rectorseal 45302 Freeze Leak Repair: Stop Leaks with 0.5 Oz of Red Power! by Ryan Brunson

Stay away from this product if you have an R410a system! It should be understood that it will work with any freon that can apply to the sealant, but not to the tool. Fitting was easy enough, but the crimp connection from the low pressure AC connector to the hose just isn't up to the task at R410a pressure, despite the instructions saying it can be used in systems with suction pressures in excess of 100psi. this is R410a. does. Instructions recommend using a caulking gun to inject contents into higher pressure systems. However, without even attempting to inject the contents, the slight lateral pressure tore the connector out of the tube. I have worked with air conditioning myself for many years and when I first inspected this hose connection I suspected that it would not hold. Therefore, I was ready to quickly remove it from the port and therefore lost a negligible amount of coolant.