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.
It is not necessary to seal pavers. Sealing does however retard fading of paver color and provides a measure of protection from some stains. Before sealing, pavers must be clean and dry.It is recommended that you wait at least 30 days after installation before sealing. Once sealed, you will need to re-seal approximately every two to three years.aver installation should start with the proper base material for the job. Crushed rock with approximately 1  of concrete or gunite sand is recommended. Installation of proper edge restraints is key to preventing spreading of pavers.