Gates - the people who bring us quality belts and hoses, bring us the PowerGrip hose clamp. The PowerGrip heat shrink hose clamp is designed to stop cold cooling system hose leaks - well - cold... The Gates PowerGrip clamp never requires retightening because it is made of a heat shrinkable thermoplastic material that provides a better seal than those old worm-gear types.
Available in sizes ranging from 3/8-3 1/8-inch diameter, the PowerGrip is installed by slipping it off its cardboard shipping holder onto the hose ends.
Get out your heat gun and set it on "High". Never use flame. Move gun continuously while applying heat. Takes roughly 60 seconds for the PowerGrip to tighten. Don't overdo it because too much heat will melt the clamp.
For more information contact the Gates Rubber Company at www.gates.com and ask about the PowerGrip hose clamp.