Klucel PR is a nonionic water-soluble cellulosic polymer, is well suited as a thickerner for flammable paint and varnish removers. Klucel PR provides the following benefits as a thickener in aromatic or flammable removers: - High tickening efficiency in a wide range of solvent mixtures. - Stability in the presence of high concentrations of aromatic and non-polar aliphatic solvents.