Vital Red RTV Gasket Makers -85gm The Red RTV Gasket Maker from V-Tech is the original gasket maker that is used for both high temperature and heavy-duty applications which include machinery and automotive repairs. This gasket maker is resistant to cracking, shrinking and migration caused by thermal cycling. And, it provides permanent flexibility and stability between -80oF to 650oF (-62oC to 343oC). 650oF (343oC) temperature resistant Makes leak-proof gaskets in seconds Highly resistant to automotive fluids For sealing machinery like valve cover gasket, vibration damper, water pump cover gasket.