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ASTM C794-06

(Test Method)

Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants

Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants

SIGNIFICANCE AND USE
There are differences in opinion among those concerned with sealant technology whether or not this adhesion-in-peel test is intended to simulate the conditions encountered by a sealant in normal use. Nevertheless, since it represents a test to destruction, the value of the test denotes the ability of the cured sealant to maintain a bond to the substrate under severe conditions.
Many sealant manufacturers utilize the adhesion-in-peel test for determining the adhesive characteristics of sealant/primer combinations with unusual or proprietary substrates.
SCOPE
1.1 This test method covers a laboratory procedure for determining the strength and characteristics of the peel properties of a cured-in-place elastomeric joint sealant, single- or multicomponent, for use in building construction.
1.2 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other organizations.
This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
14-Sep-2006
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
C24 - Building Seals and Sealants
Drafting Committee
C24.30 - Adhesion
Current Stage
Ref Project

Relations

Replaces
ASTM C794-01 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
Effective Date
15-Sep-2006
Replaced By
ASTM C794-10 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
Effective Date
01-Sep-2010
Referred By
ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
Effective Date
15-Sep-2006
Referred By
ASTM C1249-18(2023) - Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications
Effective Date
15-Sep-2006
Referred By
ASTM E1399/E1399M-97(2022) - Standard Test Method for Cyclic Movement and Measuring the Minimum and Maximum Joint Widths of Architectural Joint Systems
Effective Date
15-Sep-2006
Referred By
ASTM C1472-16(2022) - Standard Guide for Calculating Movement and Other Effects When Establishing Sealant Joint Width
Effective Date
15-Sep-2006
Referred By
ASTM C1481-12(2017) - Standard Guide for Use of Joint Sealants with Exterior Insulation and Finish Systems (EIFS)
Effective Date
15-Sep-2006
Referred By
ASTM C1184-23 - Standard Specification for Structural Silicone Sealants
Effective Date
15-Sep-2006
Referred By
ASTM C1021-08(2023) - Standard Practice for Laboratories Engaged in Testing of Building Sealants
Effective Date
15-Sep-2006
Referred By
ASTM E3223/E3223M-20 - Standard Guide for Specifying and Testing Field-Constructed Exterior Building Wall System Mockups in New Construction
Effective Date
15-Sep-2006
Referred By
ASTM E2813-18 - Standard Practice for Building Enclosure Commissioning
Effective Date
15-Sep-2006
Referred By
ASTM E2112-23 - Standard Practice for Installation of Exterior Windows, Doors and Skylights
Effective Date
15-Sep-2006
Referred By
ASTM C1401-23 - Standard Guide for Structural Sealant Glazing
Effective Date
15-Sep-2006
Referred By
ASTM C1564-20 - Standard Guide for Use of Silicone Sealants for Protective Glazing Systems
Effective Date
15-Sep-2006
Referred By
ASTM C1521-19(2020) - Standard Practice for Evaluating Adhesion of Installed Weatherproofing Sealant Joints
Effective Date
15-Sep-2006

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ASTM C794-06 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint SealantsASTM C794-06 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
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ASTM C794-06 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C794–06
Standard Test Method for
1
Adhesion-in-Peel of Elastomeric Joint Sealants
This standard is issued under the fixed designation C794; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope G113 on terms relating to natural and artificial weathering tests
are applicable to this test method.
1.1 This test method covers a laboratory procedure for
determining the strength and characteristics of the peel prop-
4. Summary of Test Method
erties of a cured-in-place elastomeric joint sealant, single- or
4.1 This test method consists of preparing test specimens by
multicomponent, for use in building construction.
embedding a strip of cloth in a thin layer of the sealant being
1.2 The values stated in metric (SI) units are to be regarded
tested, on several substrate materials, curing these specimens
as the standard. The values given in parentheses are provided
for a certain length of time under specified conditions, then
for information only.
placing them in a tension-testing machine in such a way that
1.3 Thecommitteewithjurisdictionoverthisstandardisnot
the embedded cloth is peeled back from the substrate at 180°,
aware of any comparable standards published by other orga-
and measuring the force exerted as well as the nature of the
nizations.
separation of the sealant from the substrate.
1.4 This standard does not purport to address all of the
safety problems, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 There are differences in opinion among those concerned
priate safety and health practices and determine the applica-
with sealant technology whether or not this adhesion-in-peel
bility of regulatory limitations prior to use.
test is intended to simulate the conditions encountered by a
sealant in normal use. Nevertheless, since it represents a test to
2. Referenced Documents
2
destruction,thevalueofthetestdenotestheabilityofthecured
2.1 ASTM Standards:
sealant to maintain a bond to the substrate under severe
C33 Specification for Concrete Aggregates
conditions.
C109/C109M Test Method for Compressive Strength of
5.2 Many sealant manufacturers utilize the adhesion-in-peel
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
test for determining the adhesive characteristics of sealant/
Specimens)
primer combinations with unusual or proprietary substrates.
C150 Specification for Portland Cement
C717 Terminology of Building Seals and Sealants
6. Apparatus and Materials
C1442 Practice for Conducting Tests on Sealants Using
6.1 TestingMachine withtensiongripscapableofpullingat
Artificial Weathering Apparatus
the rate of separation of 51 mm (2 in.)/min, and having a chart
G113 TerminologyRelatingtoNaturalandArtificialWeath-
indicator calibrated in 0.45-kg (1-lb) units.
ering Tests of Nonmetallic Materials
6.2 Standard Substrates:
3. Terminology 6.2.1 Aluminum Alloy, Type 6063-T5 or 6061-T6, with a
clear anodized finish of not less than 0.0075-mm (0.3-mil)
3.1 The definitions given in Terminology C717 on terms
thickness over a scale-free finish; 2 pieces, 152 by 76 by 6.3
relating to building seals and sealants and in Terminology
1
mm (6 by 3 by ⁄4 in.).
6.2.2 Mortar Slabs, prepare two cement mortar slabs, each
1
3
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
152 by 76 by 9.5 mm (6 by 3 by ⁄8 in.) in size, using one part
Seals and Sealants and is the direct responsibility of Subcommittee C24.30 on
of high early strength Portland cement conforming to Type III
Adhesion.
of Specification C150 for Portland Cement, to two parts by
Current edition approved Sept. 15, 2006. Published September 2006. Originally
approved in 1975. Last previous edition approved in 2001 as C794 – 01. DOI:
weight of clean, uniformly graded, concrete fine aggregate
10.1520/C0794-06.
(sand) conforming to Specification C33, for Concrete Aggre-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
gates. Use sufficient water to produce a flow of 100 6 5 when
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
tested in accordance with the procedure for the determination
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C794–06
of consistency of cement mortar described in Test Method may differ
...

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5.1 Weight loss through volatilization of components of a sealant in a building joint may affect sealant appearance because of shrinkage, and sealant performance because of the loss of functional sealant components. Exposure to high-temperature environments will accelerate the loss of volatiles.  
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Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants

SIGNIFICANCE AND USE
5.1 It is known that solar radiation contributes to the degradation of sealants in exterior building joints. The use of a laboratory accelerated weathering machine with actinic radiation, moisture and heat appears to be a feasible means to give indications of early degradation by the appearance of sealant cracking. However, simulated weather factors in combination with extension may produce more severe degradation than weather factors only. Therefore, the effect of the weathering test is made more sensitive by the addition of the bending of the specimen at cold temperature.
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5.1 Preformed tape sealants are tacky, deformable solids that are used under compression between two substrates in a variety of sealing applications. This procedure is not intended to simulate an actual use condition, but it will give some indication of the flexibility and adhesion of a tape at low temperature. It can serve to differentiate between flexible tapes that can take some movement and those that tend to harden or embrittle on aging and crack or lose adhesion when flexed at low temperature. It will also aid in identifying sealants that have poor flexibility because they are overextended and contain a low level of binder as well as those sealants having binders that will embrittle at low temperature.
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