Composite nonwoven mat with coating layer

A composite nonwoven mat comprising:

• a nonwoven base layer formed from a plurality of glass fibers held together by a binder, the nonwoven base layer having a first surface and a second surface;
• and
• a coating layer adhered to the first surface, wherein the coating layer comprises a coating composition, the coating composition comprising a polymer material in a carrier composition, wherein the polymer material comprises one or more particles of a polyolefin, a polyester, a polyamide, a polyimide, a polyacrylate, and a polyurethane, and wherein the carrier composition comprises one or more of a polyvinyl alcohol, a polyvinyl acetate, a styrene butadiene, a polyvinyl pyrrolidone, a polyacrylic acid, a polyvinyl acetate, a poly (ethylene-vinyl acetate), an acrylic polymer, a styrene acrylic polymer, a styrene butadiene polymer, a urea formaldehyde polymer, a melamine formaldehyde polymer, a phenol formaldehyde polymer, or combinations thereof,
• wherein the coating layer extends partially into the nonwoven base layer,
• wherein the composite nonwoven mat comprises a loss on ignition of 40%-75%, and
• wherein the composite nonwoven mat has an average Gurley porosity of at least 500 seconds.