MONTEREY BAY UNIFIED AIR POLLUTION CONTROL DISTRICT


RULE 426 ARCHITECTURAL COATINGS
(Adopted 5-16-79; Revised 3-17-82, 12-15-82, 12-21-83, 12-13-84, 8-25-93 and 12-18-96.)



CONTENTS

PART 1 GENERAL

1.1 Purpose
1.2 Applicability
1.3 Exemptions
1.4 Effective Dates
1.5 References

PART 2 DEFINITIONS

2.1 Architectural Coating
2.2 Below Ground Wood Preservatives
2.3 Bituminous Coating Materials
2.4 Bond Breakers
2.5 Concrete Curing Compounds
2.6 Dry Fog Coating
2.7 Enamel Undercoaters
2.8 Exempt Compounds
2.9 Fire-retardant/resistive Coating
2.10 General Primers
2.11 General Sealers
2.12 General Undercoaters
2.13 Grams of VOC Per Liter of Coating, Less Water and Less Exempt Compounds
2.14 Grams of VOC Per Liter of Material
2.15 Graphic Arts Coatings
2.16 Industrial Maintenance Primers
2.17 Industrial Maintenance Topcoats
2.18 Lacquer
2.19 Mastic Texture Coatings
2.20 Mastic Waterproofing Coatings
2.21 Metallic Pigmented Paints
2.22 Multi-colored Coatings
2.23 Non-flat Coatings
2.24 Opaque Stains
2.25 Opaque Wood Preservatives
2.26 Quick Dry Primers and Sealers
2.27 Quick Dry Enamels
2.28 Roof Coatings
2.29 Semi-transparent Stains
2.30 Semi-transparent Wood Preservatives
2.31 Shellacs
2.32 Specialty Flat Products
2.33 Specialty Primers, Sealers, and Undercoaters
2.34 Swimming Pool Coatings
2.35 Tile-like Glaze Coatings
2.36 Traffic Coatings
2.37 Varnishes
2.38 Volatile Organic Compounds (VOC
2.39 Water-based, Low-solids Stains
2.40 Waterproofing Sealers

PART 3 REQUIREMENTS AND STANDARDS

3.1 Restrictions on Coating Sales and Applications
3.2 Applicability of Most Restrictive Standards

PART 4 ADMINISTRATIVE REQUIREMENTS

4.1 Date of Manufacture Labelling
4.2 Recommendation to Apply without Thinning

 

PART 5 TEST METHODS

5.1 VOC Content
5.2 Exempt Compound Content

 


PART 1 GENERAL

1.1 Purpose
The purpose of this Rule is to limit the emissions of vapors of organic compounds from the use of architectural coatings.

1.2 Applicability
The provisions of this Rule shall apply to the manufacture, sale, and application of architectural coatings unless specifically exempted by this Rule.

1.3 Exemptions
The provisions of Section 3.1 shall not apply to the following coatings:

1.3.1 architectural coatings sold in the District for shipment outside of this District or for shipment to other manufacturers for repackaging;

1.3.2 architectural coatings supplied in containers having capacities of one quart or less;

1.3.3 architectural coatings recommended by the manufacturer for use solely as a shellac, quick dry primer, sealer or undercoat, below ground wood preservative, fire-retardant/resistive coating, tile-like glaze coating, metallic pigmented paints, swimming pool coatings, graphic arts coatings, mastic texture coatings, multi-colored coatings, dry fog coatings, and bond breakers; and

1.3.4 the specialty coatings listed below. No person shall sell, offer for sale, or apply any of the coatings listed in this Section which, at the time of sale or manufacture, exceeds the following limits for volatile organic compounds in the Table of Standards :

 

TABLE OF STANDARDS

VOC LIMITS

COATING

Grams of VOC Per Liter of Coating As Applied, 

Less Water and Less Exempt Compounds, and ExcludingColorant Added to Tint Bases

Pounds of VOC Per Gallon of Coating As Applied,

 Less Water and Less Exempt Compounds, and Excluding Colorant Added to Tint Bases

Concrete Curing Compounds

350

2.9

Enamel Undercoaters

350

2.9

General Primers, Sealers, and Undercoaters

350

2.9

Industrial Maintenance Primers and Topcoats

420

3.5

Lacquer

680

5.6

Quick Dry Enamels

400

3.3

Opaque Stains

350

2.9

Opaque Wood Preservatives

350

2.9

Roof Coatings

300

2.5

Semi-transparent Stains

350

2.9

Semi-transparent and Clear Wood Preservatives

350

2.9

Specialty Flats

400

3.3

Specialty Primers, Sealers, and Undercoaters

350

2.9

Traffic Paints for Public Streets and Highways

250

2.1

Traffic Paints for Other Surfaces

250

2.1

Traffic Paints: Black Traffic Coatings

250

2.1

Varnish

350

2.9

Waterproof Sealers

400

3.3

Waterproofing Mastic Coatings

300

2.5

VOC LIMITS

COATING Grams of VOC Per Liter of Material As Applied Pounds of VOC Per Gallon of Material As Applied
Water-based, Low-solids Stains

120

1.0

1.3.5 If anywhere on the coating container, or any sticker or label affixed thereto, or in any sales or advertising literature, any indication is given that the coating may be used or is suitable for use for any purpose other than those specifically provided for in Part 1.3.4, then the exemption provided for in Part 1.3.4 shall not apply to that coating.

1.4 Effective Dates
This Rule as revised is effective December 18, 1996.

1.5 References
The requirements of this Rule arise from the provisions of the California Clean Air Act and amendments (Health and Safety Code Section 40910 et seq.) and the federal Clean Air Act and amendments (42 U.S.C. Section 7401 et seq.) Related or referenced District Rules include: 101 (Definitions); 416 (Organic Solvents); 429 (Applications of Non-architectural Coatings).
 
PART 2 DEFINITIONS
 

2.1 Architectural Coating
Any coating applied to stationary structures and their appurtenances, to mobile homes, to pavement, or to curbs.

2.2 Below Ground Wood Preservatives
Heavy duty coatings formulated solely for the purpose of protecting below ground wood from decay or insect attack and which contain a wood preservative chemical registered by the California Department of Food and Agriculture. These coatings perform their function by penetrating into the wood.

2.3 Bituminous Coating Materials
Black or brownish materials, soluble in carbon disulfide, consisting mainly of hydrocarbons and which are obtained from natural deposits or as residues from the distillation of crude petroleum oils, or of low grades of coal.

2.4 Bond Breakers
Coatings whose sole purpose, when applied between layers of concrete, is to prevent the freshly poured top layer of concrete from bonding to the substrate on which it is poured.
 
2.5 Concrete Curing Compounds
Coatings whose sole purpose is to retard the evaporation of water from the surface of freshly cast concrete, thereby strengthening it.

2.6 Dry Fog Coating
Coatings which are formulated so that when sprayed, overspray droplets dry before subsequent contact with other surfaces.

2.7 Enamel Undercoaters
Coatings which are designed to be applied to a new surface over a primer or over a previous coat of paint, in order to improve the seal, provide better adhesion and make a smooth base for non-flat coatings.

2.8 Exempt Compounds
As defined in District Rule 101 (Definitions).

2.9 Fire-retardant/resistive Coating
A clear or opaque coating formulated and recommended to retard ignition and flame spread, or to delay melting or structural weakening due to high heat, that has been fire tested and rated by a certified laboratory for use in bringing buildings and construction materials into compliance with Federal, State, and local building code requirements.

2.10 General Primers
Coatings which are intended to be applied to a surface to provide a firm bond between the substrate and subsequent coats.

2.11 General Sealers
Coatings which are intended for use on porous substrates to protect the substrate, to prevent subsequent coatings from being absorbed by the substrate, or to prevent harm to subsequent coatings by materials in the substrate.

2.12 General Undercoaters
Coatings which are designed to provide a smooth surface for subsequent coats.

2.13 Grams of VOC Per Liter of Coating, Less Water and Less Exempt Compounds
The weight of VOC per combined volume of VOC and coating solids, calculated by the following equation:

Grams of VOC per liter of Coating, Less Water and Less Exempt Compounds =

Where:
W
s = weight of volatile compounds in grams
W
w = weight of water in grams
W
es = weight of exempt compounds in grams
V
m = volume of coating material in liters
V
w = volume of water in liters
V
es = volume of exempt compounds in liters.


2.14 Grams of VOC Per Liter of Material
The weight of VOC per volume of material, calculated by the following equation:

Grams of VOC per Liter of Material =

Where:
W
s = weight of volatile compounds in grams
W
w = weight of water in grams
W
es = weight of exempt compounds in grams
V
m = volume of the material in liters.


2.15 Graphic Arts Coatings
Coatings which are to be marketed solely for application to indoor and outdoor signs and include letter enamels, poster colors, and bulletin colors.

2.16 Industrial Maintenance Primers
Coatings which are intended to be applied to a surface prior to the application of an industrial maintenance topcoat, to provide a firm bond between the substrate and subsequent coats.

2.17 Industrial Maintenance Topcoats
High performance coatings which are formulated for the purpose of heavy abrasion, water immersion, chemical, corrosion, temperature, electrical, or solvent resistance.

2.18 Lacquer
Clear or pigmented coatings formulated with nitrocellulose or synthetic resins to dry by evaporation without chemical reaction and to provide a quick drying, solid protective film.

2.19 Mastic Texture Coatings
Coatings, except waterproofing mastic coatings, which are formulated to cover holes and minor cracks and to conceal irregularities.

2.20 Mastic Waterproofing Coatings
Weatherproof and waterproof coatings which are formulated to cover holes and minor cracks and to conceal surface irregularities, and which are to be applied in thicknesses of at least 15 mils (0.015 inches; dry film thickness).

2.21 Metallic Pigmented Paints
Non-bituminous coatings containing at least 0.4 pounds of metallic pigment per gallon (48 grams of metallic pigement per liter) of coating including , but not limited to, zinc pigment.

2.22 Multi-colored Coatings
Coatings which exhibit more than one color when applied and which are packaged in a single container and applied in a single coat.

2.23 Non-flat Coatings
Coatings which register gloss of 15 or greater on a 85 meter or five or greater on a 60 meter according to American Society for Testing and Materials Method D523 (Standard Test Method for Specular Gloss), and which is identified on a label as a gloss, semigloss, or eggshell enamel coating.

2.24 Opaque Stains
All stains that are not classified as semi-transparent stains.

2.25 Opaque Wood Preservatives
A wood preservative not classified as a semi-transparent wood preservative.

2.26 Quick Dry Primers and Sealers
Primers, sealers, and undercoaters which are intended to be applied to a surface to provide a firm bond between the substrate and subsequent coats and which are dry to touch in one-half hour and can be recoated in two hours. (Reference ASTM Method 1640)

2.27 Quick Dry Enamels
Non-flat coatings which comply with the following:

  1. capable of being applied directly from the container by brush or roller under normal conditions, normal conditions being ambient temperatures between 60F and 80F;

  2. when tested in accordance with ASTM Method D 1640: set to touch in two hours or less, and dry hard in eight hours or less by the mechanical method test; and

  3. have a 60F dried film gloss of no less than 70.


2.28 Roof Coatings
Coatings which are formulated for the sole purpose of preventing penetration of the substrate by water. These coatings include bituminous roof and waterproof mastic coatings.

2.29 Semi-transparent Stains
Coatings which are formulated to change the color of a surface but not conceal the surface.

2.30 Semi-transparent Wood Preservatives
Wood preservative stains which are formulated for the purpose of protecting exposed wood from decay or insect attack by the addition of a wood preservative chemical registered by the California Department of Food and Agriculture, and which are formulated to change the color of a surface but not conceal the surface. These coatings perform their function by penetrating into the wood.

2.31 Shellacs
Clear or pigmented coatings formulated with natural resins (except nitrocellulose resins), thinned with alcohol, and formulated to dry by evaporation without a chemical reaction and are intended to provide stain blocking properties as well as a solid protective film.

2.32 Specialty Flat Products
Self-priming flat products used only to perform one of the following functions: repair fire, smoke or water damage; neutralize odors; block stains; or coat acoustical materials without affecting their acoustical abilities.

2.33 Specialty Primers, Sealers, and Undercoaters
Primers, sealers and undercoaters used only to perform one of the following functions: repair fire, smoke or water damage; neutralize odor; block stains; block efflorescence; condition chalky surfaces or coat acoustical materials without affecting their acoustical abilities.

2.34 Swimming Pool Coatings
Coatings specifically formulated to coat the interior of swimming pools and to resist swimming pool chemicals.

2.35 Tile-like Glaze Coatings
Coatings which are formulated to provide a tough, extra-durable coating system, to be applied as continuous(seamless) high-build film which cures to a hard glaze finish.

2.36 Traffic Coatings
Coatings which are formulated to be applied to public streets, highways, and other surfaces including, but not limited to curbs, berms, driveways, and parking lots.

2.37 Varnishes
Clear or pigmented coatings formulated with various resins to dry by chemical reaction on exposure to air. These coatings are intended to provide a durable, solid protective film.

2.38 Volatile Organic Compounds (VOC)
Any compound of carbon, excluding exempt compounds, as defined in District Rule 101, which participates in atmospheric photochemical reactions. For the purpose of determination of the VOC content of a material or organic solvent mixture, product labels, manufacturer's data sheets, or the test methods described in Part 5 of this Rule may be used.

2.39 Water-based, Low-solids Stains
Stains containing at least 80% water and no more than one pound of solids per gallon of material (120 grams per liter).

2.40 Waterproofing Sealers
Coatings which are formulated for the sole purpose of protecting porous substrates by preventing the penetration of water.


PART 3 REQUIREMENTS AND STANDARDS

3.1 Restrictions on Coating Sales and Applications
No person shall sell, offer for sale or apply any architectural coating which meets any of the following criteria: 3.1.1 The coating contains more than 250 grams of volatile organic compound per liter of coating as applied (2.08 pounds per gallon), excluding any water, exempt compounds, and colorant added to tint bases, except as provided in Section 1.3.

3.1.2 The coating contains more than 380 grams of volatile organic compound per liter of coating as applied (3.17 pounds per gallon), excluding any water, exempt compounds, and colorant added to tint bases, and is defined as a nonflat coating and is manufactured prior to September 2, 1986.
3.1.3 The coating is recommended for use as a bituminous pavement sealer unless it is an emulsion type coating.

3.2 Applicability of Most Restrictive Standards
In any instance where more than one of the standards set forth in Section 3.1 may be applicable, the most restrictive standard shall apply.

PART 4 ADMINISTRATIVE REQUIREMENTS

4.1 Date of Manufacture Labelling and Filing
Containers for all coatings subject to Section 3.1 shall display the date of manufacture of the contents or a code indicating the dates of manufacture. The manufacturers of such coatings shall file with the Air Pollution Control Officer of the District and the Executive Officer of the California Air Resources Board prior to July 1, 1980, an explanation of each code.

4.2 Recommendation to Apply without Thinning
Containers for all coatings subject to the requirements of Section 3.1 shall carry a statement of the recommendation of the manufacturer regarding thinning of the coating with a VOC. The recommendation shall specify that the coating is to be employed without thinning or diluting except under normal environmental and application conditions unless any thinning recommended on the label for normal environmental and application conditions does not cause a coating to exceed its applicable standard.

PART 5 TEST METHODS

5.1 VOC Content
Measurement of volatile organic compounds in architectural coatings shall be conducted and reported in accordance with EPA Test Method 24, Determination of volatile matter content, water content, density, volume solids, and weight solids of surface coatings (Code of Federal Regulations Title 40, Part 60, Appendix A).

5.2 Exempt Compound Content
The quantity of exempt compounds in architectural coatings shall be determined using California Air Resources Board Test Method 432, Determination of Dichloromethane and 1,1,1-Trichloroethane in Paints and Coatings, or by other methods validated for such compounds by the Air Resources Board and the EPA.