What Kind of Sealer Do I Use to Cover Water Stains on Ceiling Tiles?

Before You Begin

• Before sealing ceiling tiles to cover water stains, identify the source of the leak and ensure it is repaired properly. The leak may be from a variety of sources, including broken water pipes or a leaky roof. Seek out the problem and take action to solve the issue before fixing the stain. If the leak continues after sealing and repainting the ceiling tiles, the water damage will reoccur.

Shellac

• Shellac sealer is available under various brand names. It is designed to cover stains, flaws and other discolorations. Before applying, be sure the ceiling tile is dry and relatively smooth. The sealer will not repair peeling or chipped tiles. Application of the sealer is similar to regular paint: Brush or roll on a coat of the sealer and allow it to dry. The stain may be visible through the sealer, but is not be visible after application of a coat or two of paint.

Latex Primer

• For slight discoloration on ceiling tiles from water damage, a latex primer may suffice. Shellac sealers can be costly. Using a latex primer may be more cost effective as a sealer if the stains are minimal. Latex often is the choice paint for ceiling tile. When using latex to paint ceiling tiles, a latex primer is recommended as a base even for tiles without stains. The primer adds a protective barrier over the damaged area and allows a latex paint top coat to cover the stains.

Clean the Stain

• For the household on a budget, avoiding the use of a sealer may be the best option. Depending on the previous finish of the ceiling tile, some stains may be cleaned instead of sealed over. Use household or laundry bleach to wash the area with a clean rag or soft sponge. Be careful not to damage the tile. Wear protective eye wear and gloves during the cleaning process and cover the floor with a tarp or plastic to keep the bleach from staining.