Chimney liner due to its non flammable and insulating nature perlite is often used in fire retardant applications such as chimney liners.
Perlite fire door core.
About 67 of these are doors 17 are magnesium oxide boards and 1 are flakeboards.
A wide variety of perlite fire door core options are available to you such as free samples paid samples.
Perlite fire door core consists of expanded perlite and inorganic glue.
Fireproof insulating door cores perlite is the perfect filling material for door cores because it is naturally lightweight inorganic insulating non combustible and fireproof giving it a high r value.