Prime Guard 99355 -100 F Marine Antifreeze - 4 55 Gallon Drums This is a pallet of 4 55 Gallon drums Prime Guard Antifreeze is a convenient and ready to use solution to winterize your boat once the season is over. This glycerin free antifreeze meets all OEM specifications and is effective to temperatures down to -100 F. It is important to prepare your boat for the cold to help protect water systems and engines from freeze ups during storage. Proper preparation can help prevent costly repairs and