Product Guide Plaster The Steven Holl-designed expansion to the Nelson-Atkins Museum of Art in Kansas City, Missouri, was the first U.S. project to use Fellert Acoustical Plaster, which is integral to the award-winning design. Photo: Timothy Hursley/Nelson-Atkins Museum of Art Behind the recommendations Related articles Behind the recommendations Related articles Plaster Natural lime plasters, clay coatings, and other unique finishes made with lower-impact materials More about Plaster Insulating Exterior Plaster Achieves R-5 Per Inch Carbon Footprint of Portland Cement Shrinks Switching to Portland Limestone Cement Could Reduce Emissions A life-cycle assessment of PLC shows a 12% improvement in environmental performance over ordinary portland cement (OPC) when used in concrete mixes. Innovative Products and Technology from the Greenbuild Expo Our product editors pick some winners from the expo floor at Greenbuild 2013 while raising questions about some materials.