What is the fine-grained topic of the following text: We offer emulsion polymers, including formaldehyde-free solutions, that bind wetlaid glass and/or polyester fiber mats to provide enhanced tear strength and impact resistance for nonwovens used in roofing applications such as asphalt shingles and built-up roofing. Only return the topic.
Emulsion polymers for nonwovens in roofing applications