Yes, we recommend using swimming pool cove when replacing a swimming pool liner.
Pool Cove will not wash out like sand or dirt you build by hand
A SMALL INVESTMENT THAT WILL ADD YEARS TO THE LIFE OF YOUR ABOVE-GROUND LINER!
Make sure the place pool cove around the bottom, inside circumference of your pool wall before installing your new liner. Pool cove will help prevent excessive stretching and premature wearing, adding years to the life of your
new swimming pool liner . Peel & Stick pool cove has an adhesive backing for quick, easy installation. 48” length.
Here are the pool cove installation instructions.