Internal fire doors consist of a solid-core construction made up of particleboard, chipboard and/or solid wood timber. Another important part is the intumescent seal which is situated around the edges of the door.
If you want to know more about our steel fire door wood fire door and interior door product, please contact us on alibaba https://dljfz.en.alibaba.com/?spm=a2700.galleryofferlist.0.0.4d611f5deOdayq
