A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.W-Z
Unakite - an opaque stone variegated with shades of green and pink, sometimes with a little russet or red.
UNDERLAY--(See CARPET CUSHION
Unfinished -- a product which must be sanded and have stain and/or a finish applied after installation.
UNGLAZED TILE: A hard, dense tile of uniform composition throughout, deriving color and texture from the materials of which the body is made.
Units -- four or more basic mosaic parquet squares, or four or more slats in 3/4 inch parquet, usually made from T&G strip flooring combined into a parquet unit.
URETHANE: An elastomeric polymer with excellent chemical and water resistance. Single component (moisture cure) and 2-part (chemical cure) systems are available. Both types may be applies in a fluid state and cure (polymerize) after installation. Typical tile industry applications include sealants, caulks, waterproofing membranes and high performance flexible adhesives.