Now there is a simple solution to prevent the wind from getting under your winter cover, causing damage and premature wear and tear. Winter Cover Seal is a unique blend of tough poly-blend film that wraps around your pool to seal out winter gusts. The secret is a special blend of resins that enables this unique material to stretch and hold tightly over a long period of time, even during extreme cold weather. Winter Cover Seal is also packed with UV-inhibitors so the sun will not weaken it. Since Winter Cover Seal creates an airtight seal, your pool water will be crystal clear next spring, and you can expect a longer life from your winter cover. One box wraps around a 24-foot round above-ground pool six times.