Halwemer T 291 Thermoplastic acrylic resin DSM Acrylic Resins Architectural / Decorative Isopar G Halwemer T 291 is thermoplastic acrylic resin. For low-odor wall paints, nicotine barrier primers and quick-renovation paints for interior use, as well as in penetrating stoppers and impregnation agents for exterior use on sub-strates such as stone and stucco. Thermoplastic acrylic resin. Used for low-odor wall paints, nicotine barrier primers and quick-renovation paints for interior use.