Right from the UL Web Site.

Quote
"UL approved" is not a valid term used to refer to a UL Listed, UL Recognized or UL Classified product under any circumstance. There are a number of requirements and guidelines that should be followed to accurately communicate a product's UL certification. To learn more about these guidelines, please order the free informational brochure, "Show the UL Mark" by accessing our Request Form for Informational Materials.

http://www.ul.com/faq/terminology.html

Don't get me wrong, I would try the product my only point is I do not believe UL wants you to use the phrase UL approved.

Bob Badger
Construction & Maintenance Electrician
Massachusetts