I understand the need to slow down or even stop seal leakage but also realize it is only a temporary repair, at best. If I'm someone that can perform auto repairs myself, then this might be a temporary repair I need to make because the weather may not be suitable for me to do the permanent repair. (Note: I remember a very cold January day years back when my son's old Fiesta had a water pump failure. In below freezing weather, I had to get him running again so he could get to work the next day. Car was parked at the curbing outside of his apartment. Front wheel drive and bitter cold weather. I'll never forget that repair!) Or maybe I don't have the funds to have a reputable repair shop to perform the repair. Anyway, my issue is that the required amount of AT-205 is so miniscule, how could it possibly have any desired impact. And if it can temporarily slowdown or even stop a leak at a seal point, must be some kind of stuff! Anyway, whatever he decides, I hope all goes well for him. Been There, Done That!