K-Seal for DD Series 60?

I've got a coolant leak in a Webasto pump, not on the engine. Has anyone tried to use this? K-Seal® HD - Coolant Leak Repair for Heavy-Duty Vehicles | K-Seal®

 

Replace the pump... dont bandaid it with stop leak additives. You'll end up plugging up other stuff like oil coolers and heater cores. You'll never catch me using stop leak crap like that in anything. Just fix the leak.

 

We fixed the pump leak but now there's 3 other leaks from hose clamps. So we're tightening and replacing those.