Gluing Applications B & W finishing lines offer standard "cold-glue" and "spot tacking" applications where ever possible for no additional charge. The "cold glue" standard is a solid fiber-tearing adhesive for side weld applications on the envelope pocket and "spot tacking". When fiber tearing is objectionable, B&W can provide registered "fugitive spot tacking’" using a specialty adhesive that meets USPS guidelines for automated mailing. This material allows a secure closure [mailers] without damage to the mailer when it arrives at final destination. Contact B&W Press to learn more about the finishing services that make a difference in the quality of your printing project.