Firewall FRB is a premium grade twin wall board made with a block-copolymer polypropylene resin in a unique Coroplast® flame inhibiting additive package.

Coroplast® Firewall FRB is made with polypropylene copolymer, a nonabsorbent material, and requires inks formulated for this type of product. Recommended solvent based screen printing inks formulated for Coroplast should be used for best appearance and adhesion. Improved UV and water-based inks are becoming available.

Coroplast Firewall FRB is corona treated full width on both surfaces. Corona treatment is needed for all printing applications. See Coroplast Screen Printers Guide and Technical Bulletin CSS-006 "Screen Printing Inks" for additional information on printing on Coroplast It is recommended that ink tests be performed prior to production of parts.

Corona treatment also improves the performance of most adhesives.