SMF Straight Metal Flange Expansion Joint Cover

SMF-Style Expansion Joint Cover

Why Metalastic™ SMF Expansion Joint Covers?

Field splices are one of the most notorious leak sites on the expansion joint cover. Metalastic™ Expansion Joint Covers come in continuous lengths up to 250 ft., eliminating up to 90% of those splices along with the resulting leaks and embarrassing call-backs. They also reduce installed costs by up to 8%.


  • Compatible with all types of roofing systems and available with a black or white surface membrane, Metalastic™ SMFs create a uniform surface for a neater finished appearance.
  • Available in custom styles, sizes, and transitions to meet virtually any expansion joint detail.
  • Flexible, contoured bellows have no seams or channels to trap water
  • Custom designs available, including custom profiles and transitions with galvanized, stainless steel, aluminum, or copper nailing flanges
  • Advanced Butyl technology reduces installation hassles with a self-adhering seam-joining system.
  • Splices take only 15 seconds vs. 15 minutes.
  • Uniform splicing technique for all styles makes installation and repairs quicker and easier than ever.
  • Faster, safer, and longer-lasting expansion joint seam detail.
  • Easy & Foolproof


  • Unroll Metalastic™ Expansion Joint Cover.
  • Nail inside metal nailer on one side.
  • Apply Matrix™ 203 asphalt cement to vertical curb faces (or order with Metalastic™ Butyl Tape Sealant), fold down, and fasten outside nailer.
  • Compress bellows by aligning opposite nailing flanges with opposite curb edge and fasten.


Black, White

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