Concrete is a common material for basement or garage floors because it is relatively tough and inexpensive. Concrete is porous, however, which means that it will absorb stains easily. If you drip glue on it, it might be hard to remove because the glue will settle in the concrete's pores and uneven surface. To remove it, use chemical solvents and stiff brushes.
Mastic removers contain chemicals that will break down even very tough adhesives and glues. Purchase a mastic remover designed for use on concrete floors. Most of these will contain methylene chloride. Apply it to the glue with a sponge and let it sit according to the manufacturer's recommendations. Scrape the glue up with the edge of a paint scraper and rinse the area with clear water completely.
Paint thinner is another chemical that will weaken certain types of glue and adhesive so that you can scrape them from the concrete floor. Paint thinner is harmful to the environment and has a pungent odor that can cause dizziness. Avoid this by working in a well-ventilated area or wearing a respirator while you are working. Apply the paint thinner to the glue and let it sit until it if soft enough to scrape with a paint scraper.
Acetone is a common ingredient in many paint or adhesive removal solutions. Like paint thinner, it is toxic and should only be used by an adult in a well-ventilated area. Soak the glue with the acetone until it is soft. Depending on how old and large the glue is, this may take several hours. Scrape the glue up and rinse the area with clear water.
WD-40 is effective in removing many types of glue and sticky substances, but it might not be able to remove glue that is covering the entire surface of a concrete floor. To use it, spray the WD-40 over the glue and let it sit until it is soft enough to remove. Always rinse the area thoroughly.
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