An all-acrylic polymer emulsion specifically designed for bonding wet laid glass and/or polyester fiber mats that can be used in roofing products such as built-up roofing (BUR), asphalt shingles and facer mats. This firm, hydrophobic binder is also suggested for other industrial nonwovens such as filters, facer sheets, resilient flooring substrates and geotextile applications. A combination of excellent hot tensile strength, low foaming properties and mechanical strength makes this a good choice for use as a sole binder or a co-binder with urea formaldehyde (UF) resins for these applications.