HB Fuller PS-998R

Two component polysulfide sealant

Material Supplier:

HB Fuller


Window manufacturing


Secondary seal for insulating glass

Material Specs


Typical Properties:

  • Ratio (A:B) by weight: 10:1
  • Viscosity
    • Paste
  • Chemistry: Polyusulfide
  • Color: Black
  • Calibration Factors
    • Base (A): 0.2781
    • Catalyst (B): 0.1087

Graco Exactablend  Advanced Glazing Proportioner


  • Proportioner:
    • With boom: 24R815
    • No boom: 24R816

Delivery Method

  • UL6000/ Flex Mixer: 24P223 or Tri-Core mixer: 24P221
    • 10’ Hose kit: 24R834
    • Base hose: 5/8” x 10 ft
    • Catalyst hose: 1/4” x 5 ft (two sections)
  • Or:
    • 15’ Hose Kit: 25C239
    • Base hose: 3/4” x5’, 5/8” x 10 ft
    • Catalyst hose: 1/4” x 5 ft (three sections)
  • MD2 valve: 24P217
    • 1/2” x 36 element mixer: 512286
    • 1/2” x 36 element shroud: 16T003
    • 10’ Hose Kit: 25C238
    • Base hose: 5/8” x 10
    • Catalyst hose: 3/8” x 5 ft, 1/8”x 5 ft
  • Or:
    • 15’ Hose kit: 25C240
    • Base hose: 3/4” x 5 ft, 5/8” x 10 ft
    • Catalyst hose: 1/4” x 5 ft (two sections),
    • 1/8” x 5 ft (one section)
  • Max flow rate**:
    • UL6000/Flex Mixer: 768 gm/min
      • 10’ Hose Kit: 24R834
    • UL6000/Tricore Mixer: 1214 gm/min
      • 10’ Hose Kit: 24R834
    • MD2 Valve: 952 gm/min
      • 10’ Hose Kit: 25C238
    • UL6000/Flex Mixer: 630 gm/min
      • 15’ Hose Kit: 25C239
    • UL6000/Tricore Mixer: 1214 gm/min
      • 15’ Hose Kit: 25C239
    • MD2 Valve: 618 gm/min
      • 15’ Hose Kit: 24C240


  • Light tower kit: 24R824
  • Caster kit: 24T091

All written and visual data are based on the latest product information available. Graco reserves the right to make changes at any time without notice. All other brand names or marks are used for identification purposes and are trademarks of their respective owners.

*Exact equipment configuration will vary and depend on factors such as rate of output, length and size of hoses, bead size desired, and container sizes.

**Flow rate obtained from lab testing. Actual flow rates may vary depending on air supply system, temperature, applicator tip, etc.


Improved Performance & Throughput

For insulating glass application, precise application of silicone materials is critical for delivering superior adhesion, durability and leak-free performance. Major manufacturers are moving away from tape-based applications and using automated dispense of adhesive and silicone materials. This approach provides a more consistent and complete seal. Learn more about window & door manufacturing efficiencies.

On- Ratio Meter, Mix & Dispense 

The Graco ExactaBlend AGP is a variable ratio system that accurately meters, mixes and dispenses two-component medium to high-viscosity sealants and adhesives. It is used to seal and bond glass to metal or aluminum structures. Advanced pumping technology creates a better, more consistent bead – which results in reduced rework and less wasted material. For unique applications, Graco can also custom-engineer an equipment solution in our 130,000 square foot testing lab. Learn more about the Exactablend AGP.

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