I picked up a couple tubes of Hylomar Blue

at Harbor Freight believe it or not, looking on line it lists it as discontinued but it might be still on the shelf at the store is one is close to you.

Manufactured, distributed by Permatex now also! So any NAPA should have it!

http://www.permatex.com/products/Automotive/automotive_gasketing/gasket_sealants/auto_Permatex_Hylomar_Universal_Blue_Racing_Formula_Gasket_Dressing_Flange_Sealant.htm