Jon G, I haven't used the DAP window sealant, I only suggested it 'cuz of the claim of easy removal. If you want something tough as nails but still a little flexible and will hold up to sun, cold, etc, try urethane roofing caulk/sealer in black.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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