The Contec Mold Test Strip is simple, do-it-yourself test designed to detect the presence of protein-containing organic matter, such as mold, mildew, blood, body fluids, and allergenic materials like pet and human dander, dust mite feces, etc. The Mold Test Strips are non-toxic and contain no harmful chemicals or ingredients, making them safe for use on most common surfaces and finishes found in residential, institutional, and commercial buildings, including porous and non-porous construction materials and HVAC/Air Ducts.