It bridges cracks and small holes. Elastomeric Exterior Wall Coating is a 100% acrylic coating that can be applied over brick, block, concrete, metal or wood. COATINGS Armor Coat Clear: A clear acrylic sealer that gives a lasting gloss to surfaces and provides protection against weathering and wear. Their ease of application and powerful ingredients "Get the Job Done" quickly and efficiently with little "down" time and are a safe alternative to harsh toxic products that pollute the environment. These coatings and cleaners are safe enough for the home owner as well as strong and tough enough for the professional on all types of properties.

Red Clay Stain Removeris a liquid "must have" product for areas of the country where there is red clay that stains concrete, brick and stucco surfaces. Other acids, particularly hydrochloric acid, which is very powerful, should not be used to clean all types of brick, especially dark colored brick. While this efflorescence may usually be removed by a second cleaning--although it is likely to be expensive and time-consuming--hydrofluoric acid can also leave calcium fluoride salts or a colloidal silica deposit on masonry which may be impossible to remove. For example, hydrofluoric acid can etch masonry leaving a hazy residue on the surface. While certain acid-based cleaners may be appropriate if used as directed on a particular type of masonry, if left too long or if not adequately rinsed from the masonry they can have a negative effect. For, this reason, testing the cleaner on an inconspicuous spot on the building is always necessary. Obviously, acidic cleaners should not be used on acid-sensitive materials; however, it is not always clear exactly what the composition is of any stone or other masonry material.

If not carefully chosen, chemical cleaners can react adversely with many types of masonry. Both acidic and alkaline cleaners can be dangerous to cleaning operators, and clearly, there are environmental concerns associated with the use of chemical cleaners. In addition, many chemical cleaners simply do not work in cold temperatures. Chemical cleaning should never be undertaken in temperatures below 40 degrees F , and generally not below 50 degrees F. Like water methods, they should not be used in cold weather because of the possibility of freezing. Since most chemical cleaning methods involve water, they have many of the potential problems of plain water cleaning. Potential hazards of chemical cleaning. The removal of layers of paint from a masonry surface is usually accomplished by applying the remover either by brush, roller or spraying, followed by a thorough water wash. Removing paint and some other coatings, stains and graffiti can best be accomplished with alkaline paint removers, organic solvent paint removers, or other cleaning compounds.

First the masonry is given a slightly acidic wash--often with acetic acid--to neutralize it, and then it is rinsed again with water.