This new Pool Antifreeze gives you great winter protection at a lower price. Our antifreeze is concentrated so 1 quart mixed with 3-quart of water will make 1 gallon of antifreeze that will protect pool plumbing down to -40-DegreeF. Want even lower temperature protection? Add less water. Comes with a dilution chart, so you can make the strength you desire. We recommend -40-DegreeF to be safe. Concentrated antifreeze is totally safe for swimming pool use. Use one gallon for every 10-feet of 1-1/2-inch pipe. Safe for all types of pool plumbing. 100-percent Propylene Glycol.