We're really sorry... We don't currently have that one in stock Please add your email and we'll notify you when it's back Email Home» All OptiShield Products» Glycol Solutions DowFrost HD & Water5 Gallon Size DowFrost HD & Water5 Gallon Size Product ID 300640 Premix is a mixture containing 65% RO water, and 35% DowFrost HD Inhibited Propylene Glycol. Price$262.00 Add to cart Premix is a mixture containing 65% RO water, and 35% DowFrost HD Inhibited Propylene Glycol. Dowtherm SR-1 and Water5 Gallon Size Dowtherm SR-1 and Water5 Gallon Size Product ID 300650 Premix is a mixture containing 45% RO water, and 55% Dow SR-1 Inhibited Ethylene Glycol. Price$187.00 Add to cart Premix is a mixture containing 45% RO water, and 55% Dow SR-1 Inhibited Ethylene Glycol.