Oatey Perfect Slope installs a perfect tile shower pre-slope that ensures half the mortar and half the time required. The Perfect Slope features a weep guard that facilitates proper moisture drainage, protecting weep holes and ensuring longevity. Ideal for meeting code specifications that mandate a slope beneath PVC shower pan liners. Liner installs directly onto Perfect Slope. It replaces the pre-sloped mortar bed. It is easy to install and easy to trim.