Important Two-Component Material Information
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Polyester Resins and Gel-Coats Spraying and Lamination Operations

Graco recommends that you consult OSHA Sections
1910.94, 1910.106, 1910.107 and NFPA No. 33, and
NFPA No. 91 for further guidance.
Important Two-Component Material Information

Material Self-ignition

Keep Resin and Catalyst

Components Separate

Changing Materials

• When changing materials, flush the equipment mul-
tiple times to ensure it is thoroughly clean.
• Always clean the fluid inlet strainers after flushing.
• Check with your material manufacturer for chemical
compatibility.
Spraying materials containing polyester resin and
gel-coats creates potentially harmful mist, vapors and
atomized particulates. Prevent inhalation by providing
sufficient ventilation and the use of respirators in the
work area.
Read the material manufacturer’s warnings and mate-
rial MSDSs to know specific hazards and precautions
related to polyester resins and gel-coats.
To prevent contact with polyester resins and gel-coats,
appropriate personal protective equipment, including
chemically impermeable gloves, boots, aprons and
goggles are required for everyone in the work area.
Remove all accumulations of overspray, FRP sand-
ings, etc. from the building as they occur. If this waste
is allowed to build up, spillage of catalyst is more likely
to start a fire.
If cleaning solvents are required, read material manu-
facture’s warnings and material MSDS to know spe-
cific hazards and precautions. (Graco recommends
that clean-up solvents be nonflammable.)
Some materials may become self-igniting if applied
too thickly. Read material manufacturer’s warnings
and material MSDS.
Cross-contamination can result in cured material in
fluid lines which could cause serious injury or
damage equipment. To prevent cross-contamination
of the equipment’s wetted parts, never interchange
catalyst (usually MEKP) and resin (usually polyester
resin or gel-coat) parts.