Roofing System and Roof Expansion Joint from Sika Emseal

Roofing System & Expansion Joint Warranty — Sika Sarnafil/Emseal

Roofing system membranes, and expansion joints that bridge and seal structural expansion joint openings, are under constant exposure to the elements. The ability to function here, accommodate complex changes in plane and direction, and provide continuity of seal to adjacent vertical joint seals is crucial in ensuring a watertight seal. A comprehensive warranty from a single source that covers both the membrane and the expansion joint is now available.

Sika Sarnafil and Sika Emseal are pleased to announce that when Emseal’s RoofJoint product is used in conjunction with Sarnafil® and Sikaplan®  roofing systems, Sika can provide a single-source, full-system warranty for up to 20 years.

Emseal’s Roofjoint is a dual-seal, double-flanged, extruded thermoplastic (nitrile PVC alloy) roof expansion joint system that easily accommodates deck movement and provides redundant levels of integration with Sarnafil and Sikaplan PVC roofing systems. RoofJoint also addresses specific detailing conditions to ensure continuity of seal, such as tees, crosses, parapet details, and roof to wall transitions. All connections in Roofjoint components are welded and reinforced to ensure watertight integrity.

Roofjoint is marketed and sold through Sika Emseal sales channels. Emseal will provide the necessary support to the designer as well as to Sarnafil’s authorized applicators that install it. Emseal’s Roofjoint product data sheet and installation guidelines provide specifics.

Sika Sarnafil roofing systems, have over 60-years of experience in unmatched thermoplastic membrane production experience. Billions of square feet of PVC/vinyl membrane have been produced and installed on buildings in varying climates all over the world.

With this comprehensive warranty, specifiers and designers can have peace of mind knowing they have things covered on behalf of their property owner clients. Roof assemblies have just received the missing piece to worry-free performance.

Emseal and Sika Sarnafil have developed a set of Sarnafil® and Sikaplan® roofing guideline specifications and details specific to the Roofjoint product — Request the Guide Specification & Details Now.

Roofing System & Expansion Joint Warranty — Sika Sarnafil/Emseal


  • The highest quality, watertight tie-in to Sarnafil® and Sikaplan® PVC roofing systems.
  • PVC formulation = no compatibility concerns.
  • Redundant sealing across the joint opening
  • Allows drainage across the joint opening
  • Redundant dual-level roof-membrane integration
  • Extremely robust – RoofJoint is two layers, each 120 mils thick, for performance and longevity.
  • Redundant fastening—welded bond & mechanical termination bar
  • Factory heat welded transitions at tees, crosses, angles, roof-to-wall details, parapet wall details, etc.
  • Watertight transition to Seismic Colorseal wall joints using RoofJoint Closures
  • Uniquely addresses wall joint to roof joint interface
  • Continuity of seal through transitions
  • High movement


  • Flat roofs
  • Low and steep sloped roofs
  • Uniquely shaped roofs
  • Weld to PVC roofs
  • Roof to wall details
  • Roof to wall expansion joint transitions

U.S. Patents


US Patent: 10,851,542
US Patent: 9,850,662
US Patent: 9,739,050
US Patent: 9,322,163