A process for making a fibrous product using a binder based on a formaldehyde-containing resin and especially for making fiberglass insulation, and to the fibrous product itself, wherein a formaldehyde scavenger is separately applied to the fibrous mat, such as by treating the fibers with an aqueous mixture consisting essentially of the formaldehyde scavenger, with the result that the fibrous product exhibits a reduced level of formaldehyde emissions.