https://www.acehardware.com/departments/paint-and-supplies/caulk-and-sealants/caulk/1696475
DAP HVAC Silicone Clear 100% RTV Silicone HVAC Sealant 10.3 oz Mfr# 7079808011 - Ace Hardware
EXTREME TEMP FORMULA - remains flexible from -40 to 475 Deg. FahrenheitFind the HVAC SEALANT CLR 10.3OZ at Ace.