ASTM D6694/D6694M-15(2023)
(Specification)Standard Specification for Liquid-Applied Silicone Coating Used in Spray Polyurethane Foam Roofing Systems
Standard Specification for Liquid-Applied Silicone Coating Used in Spray Polyurethane Foam Roofing Systems
ABSTRACT
This specification covers a liquid-applied solvent dispersed elastomeric coating used as a roofing membrane for spray polyurethane foam (SPF) insulation whose principal polymer in the dispersion contains more than 95 % silicone. The product, as manufactured, shall be in liquid form for application to SPF surfaces by brushing, squeegeeing, rolling, or spraying. The product shall be composed of dispersion containing as the principal polymer more than 95 % silicone polymers to which various pigments and other additives have been added to give the required physical properties. Liquid properties like viscosity, volume solids, and weight solids shall be determined after conducting different tests. Physical properties of cured silicone coating like elongation, tensile strength, permeance, accelerated weathering, adhesion, tear resistance, and low-temperature flexibility shall be determined after a series of tests.
SCOPE
1.1 This specification covers a liquid-applied solvent dispersed elastomeric coating used as a roofing membrane for spray polyurethane foam (SPF) insulation whose principal polymer in the dispersion contains more than 95 % silicone.
1.2 This specification does not provide guidance for application.
1.3 The following precautionary caveat pertains only to the test method portions, Sections 5 and 6.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 31-Dec-2022
- Technical Committee
- D08 - Roofing and Waterproofing
Relations
- Effective Date
- 01-Mar-2024
- Effective Date
- 01-Jan-2024
- Effective Date
- 15-Nov-2023
- Effective Date
- 01-May-2020
- Effective Date
- 15-Mar-2020
- Effective Date
- 15-Dec-2018
- Effective Date
- 15-Dec-2018
- Effective Date
- 01-Jun-2018
- Effective Date
- 01-Nov-2017
- Effective Date
- 01-Jul-2016
- Effective Date
- 01-Feb-2016
- Effective Date
- 01-May-2015
- Effective Date
- 01-Dec-2014
- Effective Date
- 15-Oct-2014
- Effective Date
- 01-Mar-2014
Overview
ASTM D6694/D6694M-15(2023) is the international standard specification for liquid-applied, solvent-dispersed, elastomeric silicone coatings used as roofing membranes on spray polyurethane foam (SPF) insulation. Developed by ASTM Committee D08 on Roofing and Waterproofing, this specification ensures that silicone coatings possess the necessary properties to perform as protective, durable roofing membranes. These coatings must primarily consist of silicone polymers (over 95%), enabling superior weather resistance, flexibility, and adhesion when applied to SPF roofing systems.
Key Topics
- Product Composition: The standard requires the silicone coating to be in a liquid form when manufactured, primarily composed of more than 95% silicone polymers, with additional pigments and additives for optimal performance.
- Application Methods: Designed for ease of use, these liquid-applied silicone coatings can be applied to SPF surfaces by brushing, squeegeeing, rolling, or spraying. The standard itself does not provide guidance for the application process.
- Performance Testing:
- Liquid Properties: Viscosity, volume solids, and weight solids are established per referenced ASTM test methods.
- Physical Properties After Curing: Elongation, tensile strength, permeance, accelerated weathering resistance, adhesion, tear resistance, and low-temperature flexibility are measured to ensure durability and effectiveness.
- International Consistency: The standard is developed according to globally recognized principles and offers requirements in both SI and inch-pound units.
Applications
Liquid-applied silicone coatings covered by ASTM D6694/D6694M-15(2023) are vital in commercial and industrial roofing applications, especially for SPF roofing systems. Main benefits and practices include:
- Roof Protection: These coatings provide a seamless, waterproof membrane over SPF insulation, protecting against water intrusion, UV radiation, and weathering.
- Durability and Flexibility: Stringent testing ensures that the cured film maintains performance under harsh environmental conditions, including large temperature variations and mechanical stress.
- Ease of Installation: The liquid nature allows for quick and even application over complex rooftop geometries, minimizing seams and potential leak points.
- Sustainable Roofing Solutions: Silicone coatings can extend the service life of SPF roofs, reducing the need for tear-off or full replacement, contributing to greener building maintenance strategies.
Related Standards
ASTM D6694/D6694M references a range of related ASTM test methods and standards for verifying key properties:
- ASTM D2196 - Rheological Properties (Viscosity) of Non-Newtonian Materials
- ASTM D2370 - Tensile Properties of Organic Coatings
- ASTM D2697 - Volume Nonvolatile Matter in Coatings
- ASTM D1644 - Nonvolatile Content of Varnishes
- ASTM D903 - Adhesion (Peel Strength) of Adhesive Bonds
- ASTM D624 - Tear Strength of Vulcanized Rubber and Thermoplastic Elastomers
- ASTM D522/D522M - Mandrel Bend Test (Flexibility)
- ASTM E96/E96M - Water Vapor Transmission Rate
- ASTM D4798/D4798M - Accelerated Weathering (Xenon-Arc Method)
These referenced standards provide the methods for verifying critical product attributes like tensile strength, adhesion, weather resistance, and overall durability, ensuring reliable performance across varied climatic and operational conditions.
By following ASTM D6694/D6694M-15(2023), manufacturers and roofing professionals can ensure their liquid-applied silicone coatings meet stringent quality criteria, promoting long-term SPF roofing performance and compliance with international best practices in building waterproofing and protection.
Keywords: ASTM D6694, silicone roof coating, SPF roofing, liquid-applied roofing membrane, elastomeric coating, spray polyurethane foam, roofing standards, waterproofing.
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Frequently Asked Questions
ASTM D6694/D6694M-15(2023) is a technical specification published by ASTM International. Its full title is "Standard Specification for Liquid-Applied Silicone Coating Used in Spray Polyurethane Foam Roofing Systems". This standard covers: ABSTRACT This specification covers a liquid-applied solvent dispersed elastomeric coating used as a roofing membrane for spray polyurethane foam (SPF) insulation whose principal polymer in the dispersion contains more than 95 % silicone. The product, as manufactured, shall be in liquid form for application to SPF surfaces by brushing, squeegeeing, rolling, or spraying. The product shall be composed of dispersion containing as the principal polymer more than 95 % silicone polymers to which various pigments and other additives have been added to give the required physical properties. Liquid properties like viscosity, volume solids, and weight solids shall be determined after conducting different tests. Physical properties of cured silicone coating like elongation, tensile strength, permeance, accelerated weathering, adhesion, tear resistance, and low-temperature flexibility shall be determined after a series of tests. SCOPE 1.1 This specification covers a liquid-applied solvent dispersed elastomeric coating used as a roofing membrane for spray polyurethane foam (SPF) insulation whose principal polymer in the dispersion contains more than 95 % silicone. 1.2 This specification does not provide guidance for application. 1.3 The following precautionary caveat pertains only to the test method portions, Sections 5 and 6. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ABSTRACT This specification covers a liquid-applied solvent dispersed elastomeric coating used as a roofing membrane for spray polyurethane foam (SPF) insulation whose principal polymer in the dispersion contains more than 95 % silicone. The product, as manufactured, shall be in liquid form for application to SPF surfaces by brushing, squeegeeing, rolling, or spraying. The product shall be composed of dispersion containing as the principal polymer more than 95 % silicone polymers to which various pigments and other additives have been added to give the required physical properties. Liquid properties like viscosity, volume solids, and weight solids shall be determined after conducting different tests. Physical properties of cured silicone coating like elongation, tensile strength, permeance, accelerated weathering, adhesion, tear resistance, and low-temperature flexibility shall be determined after a series of tests. SCOPE 1.1 This specification covers a liquid-applied solvent dispersed elastomeric coating used as a roofing membrane for spray polyurethane foam (SPF) insulation whose principal polymer in the dispersion contains more than 95 % silicone. 1.2 This specification does not provide guidance for application. 1.3 The following precautionary caveat pertains only to the test method portions, Sections 5 and 6. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D6694/D6694M-15(2023) is classified under the following ICS (International Classification for Standards) categories: 83.100 - Cellular materials; 91.060.20 - Roofs. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D6694/D6694M-15(2023) has the following relationships with other standards: It is inter standard links to ASTM E96/E96M-24, ASTM D16-24, ASTM E96/E96M-23, ASTM D1079-20, ASTM E1953-20, ASTM D1079-18, ASTM D1079-18e1, ASTM D2196-18, ASTM D903-98(2017), ASTM D16-16, ASTM D1079-16, ASTM E96/E96M-15, ASTM D16-14, ASTM E96/E96M-14, ASTM E1953-14. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D6694/D6694M-15(2023) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6694/D6694M −15 (Reapproved 2023)
Standard Specification for
Liquid-Applied Silicone Coating Used in Spray Polyurethane
Foam Roofing Systems
This standard is issued under the fixed designation D6694/D6694M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D522/D522M Test Methods for Mandrel Bend Test of At-
tached Organic Coatings
1.1 This specification covers a liquid-applied solvent dis-
D624 Test Method for Tear Strength of Conventional Vul-
persed elastomeric coating used as a roofing membrane for
canized Rubber and Thermoplastic Elastomers
spray polyurethane foam (SPF) insulation whose principal
D903 Test Method for Peel or Stripping Strength of Adhe-
polymer in the dispersion contains more than 95 % silicone.
sive Bonds
1.2 This specification does not provide guidance for appli-
D1079 Terminology Relating to Roofing and Waterproofing
cation.
D1644 Test Methods for Nonvolatile Content of Varnishes
1.3 The following precautionary caveat pertains only to the D2196 Test Methods for Rheological Properties of Non-
Newtonian Materials by Rotational Viscometer
test method portions, Sections 5 and 6.
D2370 Test Method for Tensile Properties of Organic Coat-
1.4 The values stated in either SI units or inch-pound units
ings
are to be regarded separately as standard. The values stated in
D2697 Test Method for Volume Nonvolatile Matter in Clear
each system may not be exact equivalents; therefore, each
or Pigmented Coatings
system shall be used independently of the other. Combining
D4798/D4798M Practice for Accelerated Weathering Test
values from the two systems may result in nonconformance
Conditions and Procedures for Bituminous Materials
with the standard.
(Xenon-Arc Method)
1.5 This standard does not purport to address all of the
E96/E96M Test Methods for Gravimetric Determination of
safety concerns, if any, associated with its use. It is the
Water Vapor Transmission Rate of Materials
responsibility of the user of this standard to establish appro-
E1953 Practice for Description of Thermal Analysis and
priate safety, health, and environmental practices and deter-
Rheology Apparatus
mine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions in Terminologies D16 and D1079 shall
ization established in the Decision on Principles for the
apply to this specification.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Materials and Manufacture
Barriers to Trade (TBT) Committee.
4.1 Composition—The product, as manufactured, shall be in
liquid form for application to SPF surfaces by brushing,
2. Referenced Documents
squeegeeing, rolling, or spraying. The product shall be com-
2.1 ASTM Standards:
posed of dispersion containing as the principal polymer more
D16 TerminologyforPaint,RelatedCoatings,Materials,and
than 95 % silicone polymers to which various pigments and
Applications
other additives have been added to give the required physical
properties.
This specification is under the jurisdiction of ASTM Committee D08 on
5. Liquid and Physical Properties
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.09
on Liquid Applied Coatings for Roofing and Asphaltic Concrete Pavement.
5.1 Although the product is supplied as a liquid, its perfor-
Current edition approved Jan. 1, 2023. Published January 2023. Originally
mance is based on the functional properties of the cured
approved in 2001. Last previous edition approved in 2015 as D6694/D6694M – 15.
material in film form. The coating is formed into a film fully
DOI: 10.1520/D6694_D6694M-15R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or adhered to the substrate.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 Liquid Property Requirements—The liquid coating shall
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. comply with the property requirements in Table 1.
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D6694/D6694M − 15 (2023)
TABLE 1 Liquid Property Requirements
Physical
ASTM Standard Requirements
Properties
Viscosity D2196 3500 to 50 000 CPS
Volume solids D2697 57 % min
Weight solids D1644 As listed by manufacturer
5.3 Cured Film Physical Property Requirements:
5.3.1 Specimen Preparation (Dry Time) (Table 2)—Films
are prepared by applying two coats, with a minimum of an 8 h
drying period between coats, to a polyethylene sheet substrate
(from Test Method D2370, 8.2.2) to give a total dry film
thickness of 0.50 6 0.5 mm [20 6 2 mils]. The film is allowed
to thoroughly dry at 23 6 2 °C [73.4 6 3.6 °F] and 50 6 10 %
relative humidity for 336 6 12 h. The film shall be removed
from the release paper and turned over after the first 168 h to
allow for complete drying.
6. Test Methods
6.1 Viscosity (Test Methods D2196):
6.1.1 RotationalViscometer (see Practice E1953) with 60 to
70 µN-m torque full scale equipped with a spindle of the type
shown in Fig. 1 (with an active
...
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