Most of our customers have registered and LEED certified their projects for low emitting material (adhesives). You can get more information about registering your product by visiting the web page for: LEED (Leadership in Energy & Environmental Design) Listed below are some of our LEED compliant products: 2500 Series, 3319-1, 5121, 6500 Series, PC-2002, PL-1000, MB-4650, MUF-4301-1, and Splyset 200. You can get more information by visiting the U.S. Green Council Building at http://www.usgbc.org