Seu comentário sobre "algodão doce queimado" despertou minha memória deste artigo que li há um tempo atrás. Da Green Building Adviser em fibra de vidro ecológica fedorenta
O artigo descreve a cola usada como um cheiro doce queimado:
According to Frank O’Brien-Bernini, an Owens Corning vice president and chief sustainability officer, “The new binder was introduced a couple of years ago. We have totally converted our entire product line to this product.”
O’Brien-Bernini admits that you can smell the binder when you open a fresh bag of insulation. He reminded me that old-fashioned formaldehyde-based glues also have an odor — one that is sometimes compared to cat urine. “Our prior insulation also had an odor to it that was far less pleasant,” O’Brien-Bernini said. “When we started developing this product, we did an aroma test. Most people said the new aroma is far preferable to the aroma of the prior product.”