Natural Cork Technical Info ▪▪ Natural cork surface offers excellent resiliency and tack holding properties. A. Valu-Tak Tackboard with Aluminum Trim ▪▪ The cork layer consists of finely grained composition cork produced with .5mm granulated cork and a polyurethane binder. ▪▪ Natural cork surface is featured with aluminum trim for a traditional and economical board. ▪▪ Recyclable .06" cork surface is bonded to a .44" tackable substrate for good tack-holding ability. Cork is durable and self-healing.