About: http://webisa.webdatacommons.org/390382275

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	Preferably, the covering layer is a polymeric film, such as a polyester, polyurethane, and the like, or a thin fiberglass mat or blanket.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com