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.
Report Abuse. It is important to let the concrete cure before you seal it. There are curing compounds available to speed up the curing process. I personally would give a 2 week gap at least but 7 days is usually the norm and should be ok.It also depend on the sealant you use.If it is a penetrating sealant and the manufacturer advise that you can use it before a 7 day period is up, go for it if you are pressed for time. If you seal too early, the sealant will form bubbles and the finish will realy look crappy. Source(s): Been there, done that.t also depend on the sealant you use. If it is a penetrating sealant and the manufacturer advise that you can use it before a 7 day period is up, go for it if you are pressed for time. If you seal too early, the sealant will form bubbles and the finish will realy look crappy. Source(s): Been there, done that.