HB Fuller FH3911 Polyurethane

Two-part polyurethane sealant

Material Supplier:

H.B. Fuller




Potting and sealing hollow fibers in biomedical filters

Material Specs

  • FH3911

Typical Properties:

  • Ratio (A:B) by volume: 1.724:1
  • Ratio by weight: 1.724:1
  • Chemistry: Polyurethane
  • Viscosity:
    • 500 cps
    • 250 cps
  • Flow rate: up to 640 cc’s per minute

Graco Equpiment

  • Graco PR70 Fixed Ratio Meter, Mix and Dispense Machine
  • Part Number: PR7D-ABYBMDACA94321N2NNNNNNN
  • High Volume Pump: 960 mm2
  • Low Volume Pump: 520 mm2
  • Heat zones: no heat
  • Hose:
    • 1/2 in x 15 ft (12.7 mm x 4.5 m) of polytetrafluoroethylene (PTFE), stainless steel braided high volume hose
    • 3/8 in x 15 ft (9.5 mm x 4.5 m) of polytetrafluoroethylene (PTFE), stainless steel braided low volume hose
  • Air hose, 10 ft (3 m) (15B280)

Delivery Method

  • MD2 hand held dispense valve with adjustable snuff back


  • 3 in (76.2 mm) diameter air motor
  • UHMW pistons
  • Advanced Display Module, machine mounted
  • 3/8 in (9.5 mm) x 24 element mixers
  • 120 VAC North American cord set
  • Dual PE tanks with sealable lids
  • Dessicant dryer (LC0097)

Precision Dispense

For the filtration industry, the Graco PR70 accurately mixes and dispenses a two-part potting compound to seal hollow fibers in biomedical filters. The PR70 is a compact, reliable benchtop fixed and variable ratio meter, mix and dispense system that accurately meters, mixes and dispenses two-component medium to high-viscosity materials for a broad range of applications including bonding, sealing, potting, gasketing, encapsulation and syringe filling. Standard features include electric controls, digital shot entry, gel timer, purge and preventative maintenance counters.

Posi- Ratio by Positive Displacement

The Graco PR70 uses positive displacement pumps to deliver unmatched consistency with ratio accuracy to ± 1% and 2X increase in Mean Time Before Failure (MTBF). Multiple configurations support a wide variety of applications with a ratio range from 1:1 to 24:1 with variable drive and shot sizes from 2 to 70m cc’s. Stainless steel design reduces the chance of a material incompatibility while long-lasting wear parts mean lower cost of ownership. Learn more about the PR70.


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