How to Get the Rubber Lining on a Shower to Lay Down

Pull the protective tape from the drain flange installed in the base of the shower. Open a squeeze tube of silicone caulk. Apply a bead of silicone no thinner than 1/4 inch to the top of the flange. Ensure the bead sits one inch in from all sides of the drain opening.

Set the rubber liner on the base of the shower with the center of the liner aligned with the drain opening. Press down firmly on the center of the liner to seat it in the silicone. Cut a large X over the drain opening with a utility knife. Cut a small X over each flange-mounting hole. Place the flange bracket -- shipped with the flange body -- over the drain flange. Hold it in place with the screws provided with the drain body.

Lift one side of the rubber liner. Coat the shower bottom and the underside of the rubber liner with rubber-compatible contact cement, by brushing it on evenly with a foam paintbrush. Let the cement dry for 15 minutes.

Lay the rubber liner onto the shower base while working a rubber roller across the liner to remove air bubbles and creases. Apply contact cement to the non-secured side of the liner as described. Secure the second side of the liner to the shower base using the rubber roller.

Fold the flap at each shower corner. Use a staple gun to place one staple every four inches. Keep the staples at least two inches above the base of the shower.