Armstrong’s AirGuardcoating removes half of the formaldehyde in indoor air over 10 years of a building’s use, but in the first year it can remove up to 90 percent, according to the company. The UL-backed coating also helps reduce the length and level of exposure during periods of high formaldehyde concentrations resulting from human activity or from the use of cleaning agents or office equipment. Applied to the back of the company’s Ultima ceiling panels, the coating is UL Environment certified and can contribute to LEED points in nine credit categories.; 877.276.7876.