FONTANA, Calif., May 23, 2022 (SEND2PRESS NEWSWIRE) — Fontana Paper Mills is proud to announce a new 6% + SBS modified multipurpose underlayment, otherwise known as M40. It has an organic core with a 6% + SBS modified asphalt coating and Fontana’s familiar high grip surface. Fontana Paper Mills is a roofing underlayment manufacturing plant […]