Does Glass Wool Free-formaldehyde

Glass wool using biomass curing agent is completely free of formaldehyde, and glass wool using acrylic resin curing agent is also free of formaldehyde. 

However, acrylic resin is harmful to human health. Glass wool using phenolic resin as curing agent contains trace amounts of formaldehyde in its finished product. However, according to the current production and manufacturing technology level in China, as long as it is a qualified glass wool product, the release of harmful substances meets the national environmental protection requirements for building materials, and can be used with confidence.

So the answer is Yes, glass wool is typically free from formaldehyde. Glass wool is a type of insulation material made from recycled glass fibers. 

It is known for its excellent thermal and acoustic insulation properties. Unlike some other insulation materials, glass wool does not contain formaldehyde as it is not used in the manufacturing process. Therefore, glass wool is considered to be a safe and environmentally friendly insulation option.