Section 326IAC8-21-3. VOC emissions control requirements

   (a) The owner or operator of a source that is subject to this rule shall not apply to aerospace vehicles or components any coatings, including any VOC containing materials added to the original coating supplied by the manufacturer, that contain VOC in excess of the limits specified as follows:

VOC Content Limit for Primers, Topcoats, and Chemical Milling Maskants (lbs/gallon)^a

Coating Type	Limit
Primer	2.9
Primer for general aviation rework	4.5
Exterior primer for large commercial aircraft (components or fully assembled)	5.4
Topcoat	3.5
Topcoat for general aviation rework	4.5
Self-priming topcoat	3.5
Self-priming topcoat for general aviation rework	4.5
Chemical milling maskant, type I	5.2
Chemical milling maskant, type II	1.3
aCoating limits expressed in terms of pounds of VOC per gallon of coating less water and less exempt solvent.

VOC Content Limits for Specialty Coatings (g/L)^b

Coating Type		Limit	Coating Type		Limit
Ablative coating		600	Flight test coatings:
Adhesion promoter		890		Missile or single use aircraft	420
Adhesive bonding primers:				All other	840
	Cured at 250°F or below	850	Fuel tank coating		720
	Cured above 250°F	1030	High temperature coating		850
Adhesives:			Insulation covering		740
	Commercial interior adhesive	760	Intermediate release coating		750
	Cyanoacrylate adhesive	1020	Lacquer		830
	Fuel tank adhesive	620	Maskants:
	Nonstructural adhesive	360		Bonding maskant	1230
	Rocket motor bonding adhesive	890		Critical use and line sealer maskant	1020
	Rubber based adhesive	850		Seal coat maskant	1230
	Structural autoclavable adhesive	60	Metallized epoxy coating		740
	Structural nonautoclavable adhesive	850	Mold release		780
Antichafe coating		660	Optical antireflective coating		750
Bearing coating		620	Part marking coating		850
Caulking and smoothing compounds		850	Pretreatment coating		780
Chemical agent resistant coating		550	Rain erosion resistant coating		850
Clear coating		720	Rocket motor nozzle coating		660
Commercial exterior aerodynamic structure primer		650	Scale inhibitor		880
Compatible substrate primer		780	Screen print ink		840
Corrosion prevention compound		710	Sealants:
Cryogenic flexible primer		645		Extrudable/rollable/brushable sealant	280
Dry lubricative material		880		Sprayable sealant	600
Cryoprotective coating		600	Silicone insulation material		850
Electric or radiation effect coating		800	Solid film lubricant		880
Electrostatic discharge and electromagnetic interference (EMI) coating		800	Specialized function coating		890
Elevated temperature Skydrol resistant commercial primer		740	Temporary protective coating		320
Epoxy polyamide topcoat		660	Thermal control coating		800
Fire resistant (interior) coating		800	Wet fastener installation coating		675
Flexible primer		640	Wing coating		850
bCoating limits expressed in terms of mass (grams) of VOC per volume (liters) of coating less water and less exempt solvent.

  (b) The following coating applications are exempt from the VOC content limits listed in subsection (a):

(1) Touch-up, aerosol, and U.S. Department of Defense "classified" coatings.

(2) Coating of space vehicles.

(3) Facilities that use separate formulations in volumes of less than fifty (50) gallons per year subject to a maximum exemption of two hundred (200) gallons total for such formulations applied annually.

  (c) The broad categories of primers, topcoats (including self priming topcoats), and chemical milling maskants (Type I or II) are not specialty coatings as listed in the table in subsection (a). The requirements do not apply to facilities that use separate formulations of primers, topcoats, and chemical milling maskants (Type I or II) in volumes of less than fifty (50) gallons per year, subject to a maximum exemption of two hundred (200) gallons total for such formulations applied annually. (Air Pollution Control Division; 326 IAC 8-21-3; filed Nov 3, 2009, 3:32 p.m.: 20091202-IR-326090222FRA)