Will Primer Get Rid of Mold?

Covering Up Mold

• Applying primer or paint over mold not only doesn't get rid of mold but will likely ruin your paint job. The U.S. Environmental Protection Agency reveals that moldy surfaces should be clean and dry prior to painting, as applying these coatings directly over mold will likely cause paint to peel. PaintPRO suggests that covering moldy surfaces causes mold spores to become embedded in the wall finish, making it virtually impossible to get rid of. Even worse, mold covered in primer and paint can eventually make its way to the surface of the wall, where it will continue to grow and detract from the finish of the walls.

Mold-Prevention Products

• Several companies manufacturer primers aimed at killing mold and mildew. While these products are prized for their ability to prevent mold, the mold must be cleaned off the surface before the product can be applied. Some promise to kill lingering mold and prevent new growth, while others block mold and mildew stains, yet all require users to preclean the wall prior to priming.

Benefits of Primer

• While primer won't get rid of mold, it serves as an effective means of preventing future mold growth when used in conjunction with paint, according to PaintPRO. Primers seal the wall surface, making it more difficult for moisture in the home to reach the wall and contribute to new mold and mildew. PaintPRO recommends a high-quality acrylic primer prior to painting to add in mold prevention.

Mold Cleanup

• Before applying primer, scrub moldy surfaces with a 3:1 water and bleach solution, or look for a fungicide or mold and mildew cleaner. Leave the bleach solution on the wall for 20 minutes prior to rinsing, or follow the instructions on the bottle when using a commercial cleaning. Protect your eyes and skin when working with bleach and other chemicals, and work in a well-ventilated area to prevent breathing in mold spores and chemicals. The EPA recommends wearing an N-95 respirator to limit your exposure to mold spores when cleaning mold or mildew.

Eliminating Moisture

• Keep in mind that mold and mildew are a sign of some moisture problem in the home. Before attempting to kill mold and paint your walls, take the time to find the source of the problem to prevent additional mold growth. Vent appliances outdoors, use bathroom and kitchen exhaust fans frequently and use windows and doors to ventilate the home naturally. Insulate cold water pipes to prevent condensation, and repair any plumbing leaks. Make sure gutters and drains are draining properly. Maintain humidity levels of 30 to 50 percent to help keep mold and mildew in check.