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topic 49324

High temperature and water-resistant bonding agent for plastic radiator

July 11, 2008

I need to find a glue or other substance to bond a plastic nipple on the top of a plastic automotive (Mercedes) radiator. The nipple sits atop the radiator and connects to a hose that returns hot water from the engine to the coolant reservoir. The nipple is broken and causes cooloant to leak. The glue must be withstand the high temperature and not dissolve from contact with hot water and coolant.

David Hicks
found the website on google - Dallas, Texas

July 14, 2008

Hi, David. In general you need to know what kind of plastic it is. My choice would probably be to not remove the leaking nipple but to try to seal around the break with J-B Weld [linked by editor to product info at Amazon].


Ted Mooney, Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

July 18, 2008

All the car parts stores sell the appropriate materials to repair plastic radiators. I believe the proper adhesive is polyester, but don't quote me on that.

I did try to repair one with JB Weld. No good.

jeffrey holmes
Jeffrey Holmes, CEF
      South Carolina

sidebar July 19, 2008

Well, if David wants to give more credence to Jeffrey's hands-on proven experience than to my wild-ass guess, he can just go right ahead then.

Ted Mooney,
Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

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