About: http://webisa.webdatacommons.org/394879694

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Sealants cover the slate with an acrylic or other chemical coating that essentially acts as a shield, keeping dust, debris, and other materials off of the stone.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.org