3M(TM) Glass Cloth Tape 398FRP White, 4 in x 36 yd, 8 per case Bulk A white, glass cloth film tape with an acrylic adhesive that provides superior product performance and Flame Retardant properties for aircraft maintenance and repair. 3M (TM) Flame Retardant Sealing Tape 398FRP is a glass cloth tape with an acrylic adhesive for many applications requiring high adhesion, an abrasion-resistant backing and flame retardant properties. The tape meets flame retardancy requirements of F.A.R.