It doesn't get hot enough under the hood to need high temp silicone. If you going to use RTV, regular will handle the heat. I know for sure it doesn't get as hot under the hood as it does on the engine itself. Regular RTV will handle the heat. I still say weatherstrip adhesive. Silicone is messy, and I'm not convinced it will stick to the glass and the rubber. Plus takes a while for it to set. Weatherstrip adhesive is fast setting. Minutes.
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