Important
Important Two-Component Material Information
Isocyanate Conditions
Spraying or dispensing materials containing isocyanates creates potentially harmful mists, vapors, and atomized particulates.
Read material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to isocyanates.
Prevent inhalation of isocyanate mists, vapors, and atomized particulates by pro- viding sufficient ventilation in the work area. If sufficient ventilation is not available, a
To prevent contact with isocyanates, appro- priate personal protective equipment, including chemically impermeable gloves, boots, aprons, and goggles, is also required for everyone in the work area.
Material Self-ignition
Some materials may become
Keep Components A and B Separate
Moisture Sensitivity of Isocyanates
Isocyanates (ISO) are catalysts used in two component foam and polyurea coatings. ISO will react with moisture (such as humidity) to form small, hard, abrasive crystals, which become suspended in the fluid. Eventually a film will form on the surface and the ISO will begin to gel, increasing in viscosity. If used, this partially cured ISO will reduce perfor- mance and the life of all wetted parts.
The amount of film formation and rate of crystallization varies depending on the blend of ISO, the humidity, and the tem- perature.
To prevent exposing ISO to moisture:
•Always use a sealed container with a des- iccant dryer in the vent, or a nitrogen atmo- sphere. Never store ISO in an open container.
•Keep the ISO lube pump reservoir (if installed) filled with Graco Throat Seal Liq- uid (TSL), Part 206995. The lubricant cre- ates a barrier between the ISO and the atmosphere.
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