Flexible Foams
ST 504
ST 520
ST 524
ST 526

ST-504 VARI-LOK Injection Resin

END STATE: Flexible Gel or Flexible Foam; Elastomeric, Hydrophilic, Expanding

Product Summary
MSDS & Tech Data Sheets require the Adobe Acrobat Reader
MSDS | Technical Data Sheet

• Multi-ratio, multi-form, solvent-free, MDI-based
• Hydrophilic; resin reacts and solidifies on contact with water
• Inert end product from reaction with water
• Foam may expand up to 10 times its starting volume
• Contains no measurable amount of TDI (per 40 CFR & NIOSH)
• UL Labs NSF 61 approval for potable water contact

ST-520 POLY-FOAM Injection Resin

END STATE: Flexible Foam; Elastomeric, Hydrophilic, Expanding

Product Summary
MSDS (requires Adobe Acrobat Reader).

• Very low viscosity for better penetration in fine fissures
• Hydrophilic; reacts very quickly with water and solidifies on contact
• Acetone content provides for quick uptake and distribution of water
• Flexible end-state for toleration of substantial crack movement
• Able to accommodate substantial freeze-thaw and wet-dry cycling
• Longest formulaic use history of any urethane grouting resin (1969)

ST-524 POLY-FOAM Injection Resin

END STATE: Flexible Foam; Elastomeric, Hydrophilic, Expanding

Product Summary
MSDS & Tech Data Sheets require the Adobe Acrobat Reader
MSDS | Technical Data Sheet

• Low mix viscosity for good entry into fine or water-bearing fissures
• Variable set time adjustable on site by addition of separate accelerator
• Rapid set time for quick application with minimum loss in flows
• Low viscosity without any volatile organic compounds (VOC’s)
• Accommodates substantial freeze-thaw and wet-dry cycling
• UL Laboratories NSF 61 approval for potable water contact

ST-526 POLY-FOAM ULTRA Injection Resin

END STATE: Flexible Foam; Elastomeric, Hydrophilic, Expanding

Product Summary
MSDS & Tech Data Sheets require the Adobe Acrobat Reader
MSDS | Technical Data Sheet

• Low viscosity without any volatile organic compounds (VOC’s)
• Rapid set time for quick application with minimum loss in flows
• Hydrophilic; resin reacts with water and solidifies on contact
• Flexible solid end-product tolerates significant crack movement
• Low viscosity without any volatile organic compounds (VOC’s)
• Accommodates substantial freeze-thaw and wet-dry cycling

ST-504 VARI-LOK Injection Resin

END STATE: Flexible Gel or Flexible Foam; Elastomeric, Hydrophilic, Expanding

Product Summary
MSDS & Tech Data Sheets require the Adobe Acrobat Reader
MSDS | Technical Data Sheet

• Multi-ratio, multi-form, solvent-free, MDI-based
• Hydrophilic; resin reacts and solidifies on contact with water
• Inert end product from reaction with water
• Foam may expand up to 10 times its starting volume
• Contains no measurable amount of TDI (per 40 CFR & NIOSH)
• UL Labs NSF 61 approval for potable water contact

ST-512 VARI-GEL Injection Resin

END STATE: Flexible Gel or Flexible Foam; Elastomeric, Hydrophilic, Expanding

Product Summary
MSDS & Tech Data Sheets require the Adobe Acrobat Reader
MSDS | Technical Data Sheet

• Very fast set time for fast leak flows and cold water
• Multi-ratio, multi-form, solvent-free, MDI-based resin system
• Resin may be diluted by up to 15 times water-to-resin
• Hydrophilic; resin reacts with water and solidifies on contact
• Contains no measurable amount of TDI (per 40 CFR & NIOSH)
• Non-flammable, non-carcinogenic, and non-corrosive

ST-540 FLEX-ROK Injection Resin

END STATE: Flexible Solid, High Bond Strength, Low Viscosity

Product Summary
MSDS (requires Adobe Acrobat Reader).

• Two part (A+B) 2:1 ratio, low viscosity flexible urethane system
• Strong, rubber-like end-product tolerates significant crack movement
• Extensive set-time range control by applicator on-site for wide utility
• Excellent bonding capability on wide variety of wet or dirty substrates
• Very high toleration of wet and dirty substrates in the injection zone
• High toleration of system for small variations in on-site mix ratios

ST-530 QUIK-ROK Injection Resin

END STATE: Rigid Foam, Hydrophobic, Expanding, Hard-Setting

Product Summary
MSDS (requires Adobe Acrobat Reader).

• Expansive foam with high strength to seek out and fill soil fissures
• Reacts on contact with small amount of water, expands, and solidifies
• Variable set time adjustable on site by addition of separate accelerator
• Hydrophobic; reacts on water contact, repels water during expansion
• Can be placed with both single stream and twin stream pumps
• Strong and rigid solid for significant solidification and soil support

ST-536/537 POLY-ROK Void Filling Resin

END STATE: Hard Foam, Maximum Expansion, High Strength, Low Density

Product Summary
MSDS & Tech Data Sheets require the Adobe Acrobat Reader
ST_536: MSDS | Technical Data Sheet
ST_537: MSDS

• Two part, A(ST-536) + B(ST-537) equal volume, chemically curing urethane system
• Very fast expansion and cure for rapid deployment of foam solid
• Easy to apply with simple twin-stream hand pumping equipment
• Hydrophobic resin system is indifferent to the presence of water
• High strength end-state foam structure able to bear significant loads
• Highest percentage of closed cells for minimum long-term uptake