Masonry Sealers | |
Most concrete and masonry surfaces should be sealed, although a properly constructed brick wall should shed the rain and avoid freeze damage. However, even brick construction may suffer from freeze damage in cold climates, if left unsealed. Brick window sills, for example, sometimes will spall if snow accumulates on them and freezes there. Check with dealers or masonry contractors in your area to learn local wisdom for sealing brick, masonry, or concrete. The practices vary by location and by climate: sealing exterior concrete is especially important in areas that are subject to extreme winter temperatures, because water may penetrate a concrete surface and expand and damage the concrete when the water freezes. A wide selection of concrete and masonry sealers is available. Read the label or check with the dealer to be sure you buy the right sealer. Some sealers, such as silicone sealers, are intended for use only on vertical masonry surfaces such as walls, and are not to be used to seal a wear surface such as a concrete garage floor or driveway. Other clear masonry sealers are effective when used on any exterior surface, including driveways, and can be excellent when used as primers before applying concrete floor paint. Clear acrylic sealers can be used to protect brick, stucco, terrazzo, concrete, and other masonry surfaces and should be used as a primer for applying latex masonry paints. Explain what you want to use the primer for, and ask your dealer to help you select the appropriate product for your job. Written by Gary Branson. Reprinted with permission. Copyright HouseNet, Inc. 1995 |