ASTM D6325-98(2019)
(Test Method)Standard Test Method for Determining Open Assembly Time of Carpet Mastic Adhesives
Standard Test Method for Determining Open Assembly Time of Carpet Mastic Adhesives
SIGNIFICANCE AND USE
4.1 The ability to have a sufficient open assembly time is critical when bonding a carpet. An adhesive with too short an open assembly time will not allow the installer enough time to position the carpet before the adhesive is dried beyond use. A product with too long an open assembly time will not provide enough dry time for the carpet to bond to the intended substrate without movement of the carpet.
4.2 The test method provides a means of measuring the open assembly time for an adhesive. Use of such a test method can aid both the manufacturer to develop and the user to select the appropriate adhesive for the installation of carpet.
4.3 Test Method C679 was used as a model for this test method.
SCOPE
1.1 This test method describes a procedure to measure open assembly time for a troweled carpet adhesive.
1.2 This test method provides an evaluation of the ability of an adhesive to effectively wet out the intended carpet backing.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
1.5 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
- 28-Feb-2019
- Technical Committee
- D14 - Adhesives
- Drafting Committee
- D14.70 - Construction Adhesives
Relations
- Replaces
ASTM D6325-98(2011) - Test Method for Determining Open Assembly Time of Carpet Mastic Adhesives - Effective Date
- 01-Mar-2019
- Effective Date
- 01-Jul-2012
- Effective Date
- 01-May-2012
- Effective Date
- 01-Dec-2011
- Effective Date
- 01-Jan-2011
- Effective Date
- 01-Jan-2009
- Effective Date
- 01-Nov-2008
- Effective Date
- 01-Oct-2008
- Effective Date
- 15-Aug-2008
- Effective Date
- 01-Mar-2008
- Effective Date
- 01-Dec-2006
- Effective Date
- 01-Nov-2005
- Effective Date
- 01-Apr-2005
- Effective Date
- 01-Apr-2005
- Effective Date
- 01-Dec-2004
Overview
ASTM D6325-98(2019) is the internationally recognized standard test method for determining the open assembly time of carpet mastic adhesives. Developed by ASTM International, this standard provides a practical procedure for measuring how long a troweled carpet adhesive remains workable after application - a critical property for successful carpet installation. The method is designed to support both adhesive manufacturers and end-users, such as flooring professionals, in evaluating and selecting adhesives that ensure reliable bonding between carpet and substrate.
Measuring open assembly time helps ensure that installers have enough time to position carpets before the adhesive becomes too dry to bond effectively, while also verifying that the adhesive does not remain wet so long that the carpet fails to bond securely.
Key Topics
- Open Assembly Time: Defines the interval during which an applied carpet adhesive retains its ability to bond effectively.
- Procedure Overview:
- Application of adhesive with a specified notched trowel.
- Placement of low-density polyethylene (LDPE) squares onto the adhesive.
- Use of a standardized weight and controlled conditions for accurate, repeatable results.
- Measuring and recording the percentage of adhesive transfer at intervals until the adhesive no longer transfers, establishing the open assembly time.
- Significance:
- Prevents premature drying, which hinders proper carpet placement.
- Avoids excessive open times that lead to insecure, mobile carpet installations.
- Test Consistency:
- Standardized conditions for temperature and relative humidity.
- Harmonized with other ASTM procedures, promoting reliable quality control in adhesive performance testing.
Applications
The ASTM D6325 standard is essential for a variety of applications in the flooring and construction industries:
- Adhesive Manufacturing & Quality Control: Manufacturers use this test method during product development and batch testing to set and verify open assembly time specifications for carpet mastics, ensuring consistency and reliability.
- Carpet Installation: Flooring professionals utilize adhesive products whose open assembly time aligns with project requirements. This prevents installation issues such as poor bonding or need for rework.
- Product Selection & Specification: Architects, specifiers, and facility managers refer to ASTM D6325-compliant adhesives for commercial, residential, and institutional projects, supporting informed decision-making and reducing installation failures.
- Performance Benchmarking: The method is useful for comparative testing when evaluating multiple adhesive formulations or product lines.
- Regulatory & Contractual Compliance: The standard supports compliance with building codes and industry agreements that reference open assembly time requirements for flooring adhesives.
Related Standards
For comprehensive carpet adhesive evaluation and material performance, the following ASTM standards are frequently referenced alongside ASTM D6325:
- ASTM C679 - Test Method for Tack-Free Time of Elastomeric Sealants (model for D6325 procedure).
- ASTM D907 - Terminology of Adhesives, providing standardized language for industry communication.
- ASTM D618 - Practice for Conditioning Plastics for Testing, ensuring environmental consistency during adhesive evaluation.
Practical Value
By adhering to ASTM D6325-98(2019), stakeholders gain measurable data on adhesive open time, driving better product development, selection, and installation outcomes for carpet projects. The standard delivers assurance of product performance, safety, and reliability in line with international best practices for flooring materials and adhesives.
Keywords: open assembly time, carpet mastic adhesives, carpet installation, ASTM D6325, adhesive testing, flooring adhesives, adhesive performance, flooring standards.
Get Certified
Connect with accredited certification bodies for this standard
Smithers Quality Assessments
US management systems and product certification.
DIN CERTCO
DIN Group product certification.
Sponsored listings
Frequently Asked Questions
ASTM D6325-98(2019) is a standard published by ASTM International. Its full title is "Standard Test Method for Determining Open Assembly Time of Carpet Mastic Adhesives". This standard covers: SIGNIFICANCE AND USE 4.1 The ability to have a sufficient open assembly time is critical when bonding a carpet. An adhesive with too short an open assembly time will not allow the installer enough time to position the carpet before the adhesive is dried beyond use. A product with too long an open assembly time will not provide enough dry time for the carpet to bond to the intended substrate without movement of the carpet. 4.2 The test method provides a means of measuring the open assembly time for an adhesive. Use of such a test method can aid both the manufacturer to develop and the user to select the appropriate adhesive for the installation of carpet. 4.3 Test Method C679 was used as a model for this test method. SCOPE 1.1 This test method describes a procedure to measure open assembly time for a troweled carpet adhesive. 1.2 This test method provides an evaluation of the ability of an adhesive to effectively wet out the intended carpet backing. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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. 1.5 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.
SIGNIFICANCE AND USE 4.1 The ability to have a sufficient open assembly time is critical when bonding a carpet. An adhesive with too short an open assembly time will not allow the installer enough time to position the carpet before the adhesive is dried beyond use. A product with too long an open assembly time will not provide enough dry time for the carpet to bond to the intended substrate without movement of the carpet. 4.2 The test method provides a means of measuring the open assembly time for an adhesive. Use of such a test method can aid both the manufacturer to develop and the user to select the appropriate adhesive for the installation of carpet. 4.3 Test Method C679 was used as a model for this test method. SCOPE 1.1 This test method describes a procedure to measure open assembly time for a troweled carpet adhesive. 1.2 This test method provides an evaluation of the ability of an adhesive to effectively wet out the intended carpet backing. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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. 1.5 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 D6325-98(2019) is classified under the following ICS (International Classification for Standards) categories: 83.180 - Adhesives; 97.150 - Floor coverings. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D6325-98(2019) has the following relationships with other standards: It is inter standard links to ASTM D6325-98(2011), ASTM D907-12a, ASTM D907-12, ASTM D907-11a, ASTM D907-11, ASTM C679-03(2009)e1, ASTM D618-08, ASTM D907-08b, ASTM D907-08a, ASTM D907-08, ASTM D907-06, ASTM D618-05, ASTM D907-05e1, ASTM D907-05, ASTM D907-04a. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D6325-98(2019) 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: D6325 − 98 (Reapproved 2019)
Standard Test Method for
Determining Open Assembly Time of Carpet Mastic
Adhesives
This standard is issued under the fixed designation D6325; 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 4. Significance and Use
1.1 This test method describes a procedure to measure open 4.1 The ability to have a sufficient open assembly time is
assembly time for a troweled carpet adhesive. critical when bonding a carpet. An adhesive with too short an
open assembly time will not allow the installer enough time to
1.2 This test method provides an evaluation of the ability of
position the carpet before the adhesive is dried beyond use. A
an adhesive to effectively wet out the intended carpet backing.
product with too long an open assembly time will not provide
1.3 The values stated in inch-pound units are to be regarded
enough dry time for the carpet to bond to the intended substrate
as standard. The values given in parentheses are mathematical
without movement of the carpet.
conversions to SI units that are provided for information only
4.2 The test method provides a means of measuring the
and are not considered standard.
open assembly time for an adhesive. Use of such a test method
1.4 This standard does not purport to address all of the
can aid both the manufacturer to develop and the user to select
safety concerns, if any, associated with its use. It is the
the appropriate adhesive for the installation of carpet.
responsibility of the user of this standard to establish appro-
4.3 Test Method C679 was used as a model for this test
priate safety, health, and environmental practices and deter-
method.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
5. Apparatus
dance with internationally recognized principles on standard-
1 1
5.1 Applicator Trowel— ⁄8 in. (3.2 mm) wide, ⁄8 in. (3.2
ization established in the Decision on Principles for the
mm) deep, ⁄16 in. (1.6 mm) space V-notch.
Development of International Standards, Guides and Recom-
5.2 One-kg Weight, at least 2 in. (51 mm) in diameter.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5.3 Chronometer.
2. Referenced Documents
6. Materials
2.1 ASTM Standards:
6.1 Adhesive—Any appropriate adhesive used to install
C679 Test Method for Tack-Free Time of Elastomeric Seal-
carpet.
ants
6.2 Polyethylene—Low density (LDPE) with a 0.006 in.
D618 Practice for Conditioning Plastics for Testing
(0.15 mm) thickness.
D907 Terminology of Adhesives
6.3 Glass, 12 in. by 12 in.
3. Terminology
7. Conditioning
3.1 Definitions:
7.1 Condition the LDPE, glass, and adhesive to be tested 24
3.1.1 Many of the terms in this test method are defined in
h prior to testing at 73.4 6 3.6°F (23 6 2°C) and 50 65%
Terminology D907.
relative humidity according to Practice D618.
1 8. Sample Preparation
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct respon
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...