MFM Building Products is a manufacturer of exterior, self-adhering weatherproofing products for the construction industry. Founded in 1961, MFM offers our customers a complete envelope of solutions from the rooftop to the foundation. For the metal building industry, we offer a number of steep-slope, high-temperature rated underlayments designed for use under metal roofing systems. MFM also offers several specialty products for sealing metal panel seams, as well as a UV-stable low-slope membrane.