TRI-BUILT® MILLENNIUM Lockin' Pocket® Inter-Locking Flashing System is a pre-fabricated inter-locking pocket that is easily assembled on-site and filled with fast setting, solvent free, TRI-BUILT® MILLENNIUM Hurricane Force® Universal Sealer that becomes waterproof within minutes of application.

The TRI-BUILT® MILLENNIUM Lockin' Pocket® is available in different packaging options. The pre-fabricated pockets simply connect with tongue and groove joints and are composed of a high strength, flexible polyurethane elastomer. All pieces are easily joined by a patent pending locking system to create a pocket of desired size.

TRI-BUILT® provides quality residential and commercial building materials that deliver professional results. By focusing on the professional contractor, TRI-BUILT® has become a recognized and trusted leader in the construction industry. From roofing and siding materials, windows, coatings, and more, TRI-BUILT® is a name you can trust at a competitive price.