COMDTINST 6260.30A
subsequent exposure to very small amounts of isocyanates can cause severe
allergic reactions, which produce asthma-like symptoms. A person who is
sensitized to isocyanates must no longer work with or in areas where there is
potential for exposure to isocyanate vapor or mist.
b. Exposure Limits. Reference (a) establishes a Threshold Limit Value (TLV) of
0.005 parts per million (ppm) as an 8-hour time-weighted average for TDI, MDI
and HDI. In addition, a 15-minute Short-Term Exposure Limit (STEL) of 0.02
ppm is established for TDI.
7. AUTHORIZED USE.
a. Two-part polyurethane coating systems are only authorized for use on Coast
Guard aircraft and as topcoat paint for Aids to Navigation (ATON) equipment.
These coatings are not authorized for the exterior or interior of cutters, boats,
ground support equipment, or any other equipment.
b. Only authorized Coast Guard personnel and qualified contractors shall apply two-
part coating systems.
c. One-part (moisture-cured or heat-cured) coating systems may be used in
accordance with the instructions listed on the Coating Manufacturer's Material
Safety Data Sheets (MSDS) and the requirements under paragraph 8 of this
Instruction.
8. REQUIREMENTS.
a. Protective Equipment.
(1)
The following personal protection equipment (PPE) is required during any
spray applications of isocyanate-containing compounds:
(a) Full-face, type C, continuous flow air-supplied respirator that meets the
requirements of reference (b).
(b) Protective coveralls (see enclosure (1)) with sleeves taped at the wrists.
(c) Solvent-resistant butyl rubber, nitrile or neoprene gloves (see enclosure
(1)).
(2)
For roller or brush applications of isocyanate-containing compounds, use of
the following PPE is required:
(a) Half-face air purifying respirator with organic vapor/paint mist
cartridges that meets the requirements of reference (a). Respirator
cartridges changes shall be in accordance with an established
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