The administration licenses, regulates, and provides financial assistance to small business investment companies and section 301(d) licensees (formerly minority enterprise small business investment companies).
Cured and Dry. Concrete continues to harden for several years after it is poured, but the standard period of initial curing is 28 days, or roughly one month. At this point, the concrete is very close to full strength and is ready to accept most commercially available sealants. However, sealers typically must be applied to dry concrete. You can test the concrete for moisture content by securing a piece of aluminum foil on the sidewalk with duct tape and waiting 24 hours. If the foil is dry when you remove it, the sidewalk is ready for sealing.
Wait 30 Days. New concrete should cure for at least 30 days before being painted, according to Sherwin-Williams. However, even if that time frame has passed, the paint company recommends testing for moisture.Do this by duct taping a 2-foot-by-2-foot piece of plastic to the floor or wall.t's wise to let concrete cure for 60 days before painting, according to the Valspar paint company. After the concrete dries, Valspar and Sherwin Williams both say you should acid etch the concrete so paint will adhere to it.