JB-Weld Red Hi-Temp RTV Silicone Instant Gasket Maker Sealant Dressing Glue 85G
It will not shrink or crack, resists weathering, is sensor safe and is great for many automotive applications. JB WELD SILICONE HI TEMP RED. DO IT YOURSELF: Big or small, you can DIY it with J-B. Colour When Dry - Red.