Maybe one of these similar products would be of interest:-
Moroso Cooling System Sealant 35520; All Weather Sealant 1 Pint, For Antifreeze
Holts Speedflush Cooling System Cleaner 250ml Cooler Cleaner Cooling System Cleaning
Moroso Cooling System Sealant 35500; Ceramic Engine Seal 1 Pint, No Antifreeze
Moroso Cooling System Leak Sealant 35500(2-PACK); 2-pack 1 Pint Ceramic
MOROSO MOR35520 All Weather Seal Cooling System Sealant Antifreeze Safe 1 pt Bot