Millennium PG-1 Pump Grade (Fleeceback Membrane) Adhesive

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Millennium PG-1 Pump Grade (Fleeceback Membrane) Adhesive is a two-component, essentially VOC-free, all-purpose, low-rise, polyurethane foamable adhesive that contains no solvents and sets in minutes. It is approved for use in VOC-regulated markets such as California and other OTC States. Application is quick and easy, resulting in significant labor savings for the contractor. Millennium PG-1 Pump Grade Adhesive is dispensed through any of the application tools designed for 2-part urethane, including the Patented Multi-Bead* and Multi-Bead Plus** applicators, the Patented Millennium Cyclone pump cart+ (by Garlock), or an approved low pressure pump cart that equally mixes Part 1 and Part 2 of the adhesive.

Product Type: 2K (2 component) Adhesive, Membrane Adhesive

Compatible Substrates & Surfaces: Concrete, Ethylene Propylene Diene Monomer (EPDM), Gypsum, Metal, Polyisocyanurate, Polystyrene (PS), Polyvinyl Chloride (PVC), Steel, Textiles, Thermoplastic Polyolefin (TPO), Wood, Wool

Technical Data Sheet
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Identification & Functionality

Product Image

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Key Attributes
Features Benefits
Universal formula Approved for both insulation and membrane attachment
Replaces fasteners Minimizes penetrations, deck corrosion, and thermal bridging
Low rise foam Accommodates minor surface irregularities
Solvent free Essentially VOC free, approved for use in VOC regulated markets

Applications & Uses

Basic Use

Millennium PG-1 Pump Grade Adhesive is designed for use as an adhesive for bonding approved fleece-backed single-ply membranes (TPO, PVC, EPDM) to a building’s structural roof deck, base sheets, insulation boards, and smooth-surfaced built-up and modified bitumen roof surfaces. It is dispensed in 3/4” to 1” (1.9cm - 2.5cm) wide liquid beads that will quickly spread to a width of 2-3 inches. The adhesive will expand and rise to fill minor surface irregularities.

Approved Insulations and Substrates
  • HD wood fiber
  • Polyisocyanurate
  • Polystirene (XPS & EPS)
  • Gypsum cover board
  • Asphaltic cover boards
  • Concrete
  • Gypsum roof deck
  • Cementitious wood fiber
  • Wood or steel
  • Mineral wool
  • Lightweight insulating concrete
  • Modified bitumen membranes and base sheets (sanded or granule surfaced)
  • Approved insulations (multi-layer applications)
  • Smooth built-up roof (re-roof applications)
  • Do not apply to wet or damp surfaces.
  • Not recommended for use with insulation boards larger than 4’ x 4’ (1.2m x 1.2m).
  • Do not use warped or curled insulation boards. All insulation boards must lay flat upon the roof surface.
  • Do not apply when temperatures are below 25°F (-4°C).
Application Instructions

Millennium PG-1 Pump Grade Adhesive can be applied when both ambient and substrate surface temperatures are at 25°F (-4°C) and rising provided the adhesives are properly stored. Millennium PG-1 Pump Grade Adhesive should be stored at approximately 70°F + (21°C+) for a minimum of 48 hours prior to use and remain in a warm storage area until ready for use on the rooftop. Storing the adhesive below the recommended application temperature range prior to use can have a negative effect on product performance which may include reducing the expected coverage rates of the adhesive, delayed or extended reaction and set up times and in some cases can alter the mix of the two components.

In the event the adhesive is exposed to cooler temperatures for an extended period of time, it must be brought back up to the recommended application temperature prior to use. The adhesive should never be allowed to freeze. Material stored and utilized at cold temperatures will be prone to crystallization of Part 1.

  1. Place the cartridge into the appropriate One Step™ applicator. When using the Millennium Cyclone low pressure pump cart, connect the black Part 1 fitting to the black feed hose fitting. Connect the gray Part 2 fitting to the gray feed hose fitting. Operate the pump according to Manufacturer’s instructions (see Cyclone Operator’s Manual).
  2. Utilize the empty cardboard container to capture adhesive pre-dispense or recycle empty cardboard containers.
  3. Apply Millennium PG-1 Pump Grade Adhesive directly to the substrate, using the roof membrane manufacturer’s recommended ribbon pattern to achieve proper coverage rates for membrane attachment. As adhesive is applied, allow to begin rising then place insulation board/membrane into wet adhesive and roll membrane with a weighted roller to ensure positive contact between membrane, adhesive and substrate. Do not allow the adhesive to skin over. Eliminate uneven surfaces to ensure positive contact between the insulation board and substrate.
  4. Unused material can be applied at a later date by simply plugging the cartridges (with provided plugs) and using a new One Step™ mixing nozzle. When using the bladder packaging properly clean and grease dispensing wand and pump unit according to the pump manufacturer’s recommendation.
  5. Plastic bladders are designed for easy visibility to ensure adhesive maintains a 1:1 ratio. If material is not consumed at a 1:1 ratio stop application and check for blockage in hose or dispensing manifold.
  6. Millennium PG-1 Pump Grade Adhesive provided in 50 gallon drum sets can be used with approved pump systems. The adhesives should be placed on a drum roller or agitated prior to use.
Approved Application Equipment
  • Patented Multi-Bead Plus**
  • Patented Multi-Bead*
  • Battery Powered Single Bead
  • Pneumatic Single Bead
  • Ultra Drive Manual Applicator
  • Heavy Duty Manual Applicator
  • Patented Millennium Cyclone+ (by Garlock)
  • Graco Predator E-10 Reactor
  • Graco Predator
  • Adhesives Systems Technology GMP-075
  • Adhesives Systems Technology PCH GMP-500

* US 7,506,556 B2; US D501,855 S; CA 2,493,739 C
** US 9,381,536 B2
US 9,573,150 B2; US 9,566,594 B2

Packaging & Availability

Packaging Type
Packaging and Coverage

Millennium PG-1 Pump Grade Adhesive is available in the following package:

Cartridge Size Part # Cartridges/Case
1.5 Liter PG-FA15-04 4

Covers 600 sq ft (56m2) per case. Coverage estimates indicate the total square feet of insulation/membrane attachment per case.

Size Part # Sets/Pallet
5 gal (18.9L) box, Part 1 (A) PG-IA5B-A01 18
5 gal (18.9L) box, Part 2 (B) PG-IA5B-B01  
15 gal (58L) drum, Part 1 (A) PG-15DR-A01 4
15 gal (58L) drum, Part 2 (B) PG-15DR-B01  
50 gal (189L) drum, Part 1 (A) PG-IADR-A01 2
50 gal (189L) drum, Part 2 (B) PG-IADR-B01  

Part 1 and Part 2 mixed through an approved low pressure pump cart will produce the following coverage rates:

  • 5 gallon (18.9L) Kit: 2,000-2,500 sq ft (186m2-232m2)
  • 15 gallon (58L) Kit: 6,000-7,500 sq ft (558m2-696m2)
  • 50 gallon (189L) Kit: 20,000- 25,000 sq ft (1,860m2- 2322m2)

Coverage estimates indicate total square feet of membrane attachment per kit. Rates are based on a 3/4” to 1” (1.9cm - 2.5cm) applied adhesive ribbon spaced 12” (30cm) o.c. per 4’x4’ (1.2m x 1.2m) insulation board.

Note: A 3/4” - 1” (1.9cm - 2.5cm) wide uncured adhesive ribbon will produce a 3” - 4” (7.6cm - 10.2cm) wide cured adhesive bead that will rise approximately 3/4” - 1“ (1.9cm - 2.5cm) above the substrate. Coverage rates may be lower when used over irregular surfaces and will vary depending on roughness.

Storage & Handling

Storage Information

Keep temperature of contents between 45°F to 95°F (7°C to 35°C). Bring temperature of material to approximately 70°F (21°C) before use. Do not store in direct sunlight or above 95°F (35°C). Store boxes valve side up. Keep from freezing.