Millennium Primer 240

1 of 41 products in this brand
Millennium Primer 240 is a rubber polymer-based primer used to prepare the surface of single-ply TPO and EPDM roofing membranes for improved adhesion to seam tapes, cover tapes, and flashing tapes. Primer 240 has been formulated with VOC-exempt solvents for use in regulated markets where other solvent-borne primers cannot be used. This primer does not react with atmospheric moisture, allowing it to be opened and resealed for use at a later date.

Product Type: Primer, Solventborne Adhesive

Application Area: Laminates, Roofing Membranes, Roofing Substrates

Compatible Substrates & Surfaces: Concrete, Ethylene Propylene Diene Monomer (EPDM), Metal, Plywood, Thermoplastic Polyolefin (TPO)

Features: High Performance, Improved Adhesion, Low VOC, Reusable, Solvent-Based

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Key Attributes
Features Benefits
VOC less than 250 g/L Useful in regulated markets
High performance Maintains bond strength after environmental exposures
Unique polymeric formulation Provides excellent adhesion to a variety of substrates (EPDM, TPO, metals, wood, and concrete)
Reusable Reduces waste

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Application Instructions

Surface Preparation: All work surfaces should be clean, dry, 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 with an approved EPDM or TPO membrane cleaner prior to application of Millennium Primer 240.

Equipment Clean-up: Use Mineral Spirits or VM&P naptha. Observe all manufacturer’s safety precautions and use recommendations when using solvents.

  1. Thoroughly shake or stir Millennium Primer 240 prior to use and re-stir every 15-20 minutes during use. Note: product may exhibit an “apple sauce” type texture even after agitation. This appearance is normal and will not adversely affect the product’s performance. For more information on primer appearance, see Millennium Single-Ply Primer Appearance Technical Bulletin.
  2. Do not dilute or extend Primer 240 with any liquids.
  3. Surfaces should be dry, clean and free of any loose debris before applying Primer 240. Aged waterproofing membrane should be pressure washed and dried completely before applying Primer 240. Observe all Manufacturers’ safety precautions and use recommendations when using solvents.
  4. When the surfaces are dry, apply Millennium Primer 240 with a fully saturated brush or scouring pad. The surface should appear wet during application. Apply primer to a wider area then the actual bonding area to insure complete coverage. If using a scouring pad, be sure that it is free of excessive dust from EPDM membranes. Replace pads often. Do not overwork primer.
  5. Allow primer to dry completely (typically within 30 to 40 minutes) before applying tape. Primer will visually appear “dull” or “flat” and will feel dry to the touch. Drying conditions will vary depending on ambient air conditions. NOTE: Use caution when installlling at temperatures below 40oF (5oC) to prevent blushing of EPDM primer (formation of condensation on surface of primer). Drying time may significantly increase at low temperatures.
  6. When not in use, keep lid on primer to prevent solvent evaporation. When finished, secure lid and store primer as recommended for use at a later date.
  7. Once the seam or flashing is installed the primer will take up to 48 hours to wet-out the tape surface and build full strength. Any peel tests on installed seams or flashings should not be conducted until at least 24 hours after installation. For more information, please see H.B. Fuller’s Technical Bulletin on Cool Cover™ TPO Adhesion Strength.
Basic Use

Millennium Primer 240 is used to prime EPDM and TPO roofing membrane to provide improved adhesion to the Millennium family of EPDM tapes, laminates, and sealants as well as H.B. Fuller’s Cool Cover™ line of TPO tapes, laminates, and sealants. Millennium Primer 240 is an excellent choice for priming concrete, OSB, plywood, and metal surfaces.

Packaging and Coverage

Millennium Primer 240 is available in the following package:

Container Size Part # Packaging
1 quart (0.9L) CN-5781-QT 6 quarts/case
1 gallon (3.8L) CN-5781 6 pails/case
3 gallon (11.4L) BK-5781-3 30 pails/pallet

Coverage rate will be approximately 200-225 sq. ft. per gallon (18.6-20.9 m2 per liter). 

  • Do not use as a membrane cleaner.
  • Talc, dust, oil, ice, snow, or wet conditions inhibit good adhesion.
  • Clean and dry surfaces are a necessity.
  • Not for use on PVC roof membranes.
  • Do not use on extruded or expanded polystirene insulation.


Physical Form
Typical Physical Properties
ValueUnitsTest Method / Conditions
Solids Content10%-
Weight per Gallon9.86lbs-
Dead Load Shear Test (at 70°C, 300g load)max. 0.125inches movement-
VOC Contentmax. 250grams per liter-
Typical Properties
ValueUnitsTest Method / Conditions
Application Temperature-18 - 43°C
Storage Temperature4 - 32°C-
Coverage Rate200 - 225sq. ft. per gallon-
VOC Calculation

The VOC content of this primer was determined under Rule 1168 for low solids adhesive primer. The calculation is determined as follows:
VOC content = (Ws-Ww-Wex) / Vm

  • Solids: <120 g/l
  • Ws = weight of volatile compounds in gm
  • Ww = weight of water in gm
  • Wex = Weight of exempt compounds in gm
  • Vm = volume of material in liters

Packaging & Availability

Packaging Type
Regional Availability
  • Australia & New Zealand (ANZ)
  • Latin America
  • North America
  • South East Asia

Storage & Handling

Shelf Life
18 Months
Storage Information

Store material in original unopened containers at temperatures between 40°F - 90°F (4°C - 32°C). Shelf life is 18 months when stored in unopened container.