Cool Cover™ Seam Tape

1 of 4 products in this brand
Cool Cover™ Seam Tape is an extruded, vulcanized, white pressure-sensitive rubber adhesive tape designed to provide high strength and watertight seams for single-ply TPO roofing membranes. Cool Cover™ Seam Tape is soft and tacky, providing a quick grab onto TPO field membranes, yet possesses high initial strength. Cool Cover™ Seam Tape also exhibits excellent adhesion to polar and nonpolar substrates such as glass, metals, wood, concrete, masonry, and some plastics. The tape is useful for seaming TPO waterproofing systems when heat welding is inconvenient or not an option.

Product Type: Splicing Tape, Structural Adhesive, Tape

Application Area: Membranes, Pond Linings, Roofing Substrates, Roofs

Compatible Substrates & Surfaces: Concrete, Glass, Masonry, Metal, Plastics, Wood

Features: Excellent Performance, Excellent Substrate Adhesion, High Strength

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Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Product Highlights
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

Vulcanized rubber

Strong enough to resist seam strain

Water-tight seams

Suitable for roofing or pond lining applications

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Recommended Applications

Cool Cover™ Seam Tape is designed for field splicing of TPO/EPDM membranes.

Application Methods


  1. The entire surface where Cool Cover™ 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 Millennium Single-Ply Primer or Millennium Primer 240 Low VOC 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 installlling at temperatures below 40°F (5°C) to prevent blushing of Millennium Single-Ply 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 Cool Cover™ 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 TPO membrane to fall freely onto the Seam Tape. Remove release liner at a 45° angle.
  7. Immediately roll the splice with a 2” (5.08cm) wide silicone roller. Roll perpendicular to splice edge.
  8. Seal the exposed seam edge with Patented Cool Cover™ TPO Edge Sealant.

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 Cool Cover™ Seam Tape with an approved TPO membrane cleaner.

  • 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.
  • Not for use on PVC membranes.


  • Millennium Single-Ply Primer and Millennium Primer 240 Low VOC Single-Ply Primer are designed to dry with little or no tack. When dry, the primed area will feel completely “clean” to the touch. Traditional EPDM primers are designed to remain “tacky” to the touch in the dry state. Do not use pigmented EPDM primers on TPO Single Ply membranes.
  • Cool Cover™ TPO Cover Tape is also slightly less tacky than traditional EPDM Seam Tape. After priming the TPO membrane, installing the Cool Cover™ TPO tape, and rolling the seam, allow 24 hours for the seam tape to wet-in and build strength before testing the seam. The properly assembled seam will achieve maximum strength 7 days after installation. However, the initial strength of the properly installed tape will maintain the seam integrity immediately after installation, and for years to come.



Packaging & Availability

Regional Availability
  • Africa
  • Australia & New Zealand (ANZ)
  • Europe (Excluding Russia)
  • India
  • Latin America
  • Middle East
  • North America
  • South East Asia
Packaging and Coverage

Cool Cover™ Seam Tape is available in the following size:

North America

Width Length Part # Rolls/Case
3 inch (76mm) 100 ft. (30.48m) ET-0224 4
6 Inch (152.4mm) 100 ft. (30.48m) ET-6006 2

Europe, CIS, and Middle East

Width Length Part # Rolls/Case
3 inch (76mm) 100 ft. (30.48m) ET-0224EU 4
6 Inch (152.4mm) 100 ft. (30.48m) ET-6006EU 2

Storage & Handling

Shelf Life
24 Months
Storage Conditions

Store material in original unopened packaging at temperatures between 40°F-110°F (4°C - 43°C). Shelf life is 24 months when stored as recommended.