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Millennium EPDM Seam Tape
Product Number: ET-0418
Click for the Millennium EPDM Seam Tape Technical Bulletin (Millennium_EPDM_Seam_Tape_0016-0411.pdf)

Millennium EPDM Seam Tape is an extruded, vulcanized, black pressure sensitive rubber adhesive tape designed to provide high strength, watertight seams for single ply EPDM roofing membranes.  Millennium EPDM Seam Tape is soft and tacky providing a quick grab onto EPDM field membranes, yet possesses high initial strength.  Millennium EPDM Seam Tape also exhibits excellent adhesion to polar and nonpolar substrates such as glass, metals, wood, concrete, masonry and some plastics.

Technical Data:

Typical Physical Properties and Characteristics

   Typical Values  Test Method
 Base Polymer  EPDM  FTIR
 Color  Black  Visual
 Peel Strength on EPDM  10 pli @ 70ºF  ASTM D 413
 Shear Strength on EPDM  20 psi @ 70ºF  ASTM D 816
 Brittleness Temperature  -50ºF ASTM D 746
Tensile Strength  40 psi min.  ASTM D 412
 Elongation  >1000% ASTM D 412
 Application Properties
 Service Temperature  -40ºF to 200ºF  ASTM D 3359
 Application Temp  40ºF to 120ºF ASTM D 603

 NOTE: The foregoing information is published as general information only.  The listed properties and performance characteristics are typical values and are not to be interpreted as manufacturing specifications.

Features & Benefits:
 Features  Benefits
 UL and FM approved  Proven performance
OEM grade  Industry standard quality
 No VOC’s  Environmentally safe
 Quick and easy installation  Saves time and labor
 Excellent tack  Immediate green strength
 No torch or liquid adhesives required  Improved safety
 Water-tight seams Suitable for roofing or pond lining applications


Usage/Application Notes:

Basic Use
Millennium EPDM Seam Tape is designed for field splicing of EPDM membranes.

Surface Preparation
All work surfaces should be clean, dry, and free of dirt, dust, debris, oils, un-adhered coatings, deteriorated membrane and other contaminants that may result in a surface that is not sound or is uneven.  If necessary, clean the surface to receive the Millennium EPDM Seam Tape with an approved EPDM membrane cleaner.


  1. The entire surface where Millennium EPDM Seam Tape will be applied must be cleaned and primed.
  2. Mark the membrane where the edge of the splice occurs and then fold the top portion back.  Apply EPDM primer to both sides of membrane using the supplied scrub pad.  Scrub the membrane thoroughly while the primer is wet moving up and down the seam area.  NOTE:  Use caution when installing at temperatures below 40oF (5oC) to prevent blushing of EPDM primer (formation of condensation on surface of primer).
  3. Allow the primer to dry to the touch (no material transfer, typically less than 20 minutes).  Dry time will vary depending on ambient temperature and humidity.
  4. Position the Millennium EPDM Seam Tape over the primed splice area along the marked edge.  Press in by hand.  Verify that approximately 1/8” (0.3cm) of tape extends beyond splice edge.
  5. Roll the top surface of the release liner to promote adhesion to the bottom substrate.
  6. Allow the EPDM membrane to fall freely onto the Seam Tape.  Remove lease liner at a 45º angle.
  7. Immediately roll the splice with a 2” (5.08cm) wide silicone roller.  Roll perpendicular to splice edge.


  • Do not use for detail flashing applications.
  • Talc, dust, oil, ice, snow, or wet conditions inhibit good adhesion.  Clean and dry surfaces are necessary for proper installation.


Recommended Primers

Millennium CP-2 Primer
Millennium SPC-3 Primer 
Millennium  Primer 240


Millennium EPDM Seam Tape is available in the following size:

 Width  Length  Part #  Rolls/Case
 3 inch (76.3mm)  100 ft. (30.48m)  ET-0418 4

Consult your technical sales representative regarding the availability of Millennium EPDM Seam Tape in additional widths.

Storage & Handling:

Store material in original unopened packaging at temperatures between 40°F-110°F.  Shelf life is 12 months when stored as recommended.

Health & Safety:

Prior to working with this or any product consult product label  and Material Safety Data Sheet (MSDS) for necessary health and safety precautions.