Mix the underlayment with clean water according to the ratio indicated on the underlayment package.
Stir the underlayment mixture until it is completely blended.
Spread the underlayment onto the Quikrete floor with the trowel.
Spread the underlayment out until it smoothly covers the area being worked on. Do not walk on the treated area until the underlayment has dried and set according to the drying time information on the underlayment package.