D/2 Biological Solution Headstone Cleaner as used on The White House, Stone Cleaner, Masonry, Gravestone Mould, Lichen & Algae Remover 3.785 Litres (1 US Gallon)

D/2 Biological Solution is a biodegradable, easy to use liquid that removes stains from mold, algae, mildew, lichens and air pollutants. It is effective on marble, granite, limestone, brownstone, travertine, masonry, terra cotta, concrete, stucco, wood, and other architectural surfaces including monuments, sculpture and headstones. A contact time of only 10 to 15 minutes followed by scrubbing with a soft nylon or natural bristle brush will loosen most biological and air pollutant staining. D/2 Biological Solution is effective for removing harmful biological and air pollutant staining from many building materials including masonry, marble, granite, limestone, brownstone, travertine, terra cotta, concrete, stucco, wood, canvas and vinyl & aluminum siding. Features and Benefits Fast acting: 10 to 15 minutes contact time for great results. Biodegradable Contains no acids, salts, or chlorine pH neutral Will not etch metals or glass Safer to use around plantings Is not a hazardous material and requires no special handling or protection Use full strength, no in-field mixing required Shelf life of 5 years Immediate Result Method 1. Apply D/2 Biological Solution with a brush, roller, hand pump sprayer (garden style pump sprayer) or low pressure power sprayer. 2. Allow undiluted D/2 to remain on the surface 10-15 minutes. 3. Apply additional D/2 as necessary to maintain a wet surface. 4. Scrub with soft nylon or natural bristle brush. DO NOT USE METAL BRUSH. 5. Lightly mist with water and continue scrubbing. 6. Rinse thoroughly with clean, potable water. No Scrub/No Rinse Method 1. Apply D/2 Biological Solution with a brush or pump sprayer to a dry surface. Do not pre-wet the surface. 2. Allow to dry. Repeat if there are heavy biological stains. D/2 works with the elements and results occur within one week to one month depending on severity of growth and weather conditions. The surface will become cleaner over time as the subsurface biological stains release.