Johns Manville’s nonwoven glass mats are tailored to meet your needs. We start by selecting the JM fiber glass that best suits your end-use application. With our large family of glass chemistries, we are able to blend in polymer fibers or glass microfibers when fiber glass alone does not suffice. And depending on your requirements, we have a selection of formaldehyde–free, acrylic, urea formaldehyde and other resin binders. The finished mat can then be custom slit to a width and wound to a diameter that works with your manufacturing process and/or your end product.