ASTM D1779-98
(Specification)Standard Specification for Adhesive for Acoustical Materials
Standard Specification for Adhesive for Acoustical Materials
SCOPE
1.1 This specification covers an adhesive for bonding prefabricated acoustical materials to the inside walls and ceilings of rooms in buildings. This adhesive is required to maintain a tensile adhesion (bond strength) of not less than 3.45 x 104 dynes/cm2 (1/2 lb/in2) for a long period of time under the temperature and moisture conditions likely to be encountered and to maintain sufficient plasticity to allow for movement of parts of the building as it ages.
Note 1-Cleanliness of Surface-The surface to which the acoustical material is applied with the adhesive should be clean, and dry. Surface coatings shoud be removed if their nature indicates an unsatisfactory installation, so that the adhesive can be applied to the base. When the adhesive is to be applied on a painted surface, test tile should be applied for 48 hrs to determine suitable adherence of the coating by examination. Acoustical adhesives are not intended to be applied to surfaces that are moist and that have an alkaline reaction, or that may later become moist or alkaline. Such surfaces, as concrete or plaster, should be properly dried and aged before applying the adhesive.
Note 2-Load-This adhesive is not recommended as a sole means of holding acoustical materials weighing more than 121 kg/m2 (2 1/2 lb/ft2) to ceiling surfaces.
Note 3-Amount and Condition of Material-It is recommended that sufficient adhesive be used so that there is a contact surface of not less than 1.2 x 104 cm2/m2 (20 in2/ft2) of acoustical material, with a minimum thickness of 0.3 cm (1/8 in) and that the adhesive be applied in four separate nearly spherical portions of approximately equal size near the corners for a standard 30.5 by 30.5-cm (12 by 12 in) tile. Fewer than or more than four portions for 30.5 by 30.5-cm tile are not recommended due to difficulty in leveling and in securing effective contact area on all portions. Adhesives that are hard, or do not wet the surface, or are difficult to spread should not be used.
Note 4-Rigidity of Base Surfaces- It is necessary that the material forming the base to which the adhesive is attached should be relatively smooth, firm, and rigid. If the pressure of applying tile and adhesive causes the base material to deflect excessively, tile previously applied may have their adhesive bond broken. This occurs on some types of gypsum board suspension systems.
Note 5-Aging- To date, no accelerated aging tests for adhesives have been developed to duplicate exactly aging in service. The aging tests in this specification are designed to accelerate the aging process and to test various manifestations of aging, and are intended to be satisfactory for comparing one adhesive with another; they do not necessarily reflect aging characteristics on an absolute basis. Purchasers of adhesives should receive from the manufacturer additional warranties and assurances of performance of the adhesive under normal aging.
Note 6-Erection Practices- Proper erection techniques are essential for proper performance of any acoustical adhesive. Use of a material meeting this specification will not in itself guarantee satisfactory performance. Only when tiles are applied by skilled and experienced workers following instructions from the manufacturer can the purchaser be assured of satisfactory performance of an adhesive.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 1779 – 98
Standard Specification for
Adhesive for Acoustical Materials
This standard is issued under the fixed designation D 1779; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
have their adhesive bond broken. This occurs on some types of gypsum
1. Scope
board suspension systems.
1.1 This specification covers an adhesive for bonding pre-
NOTE 5—Aging—To date, no accelerated aging tests for adhesives have
fabricated acoustical materials to the inside walls and ceilings
been developed to duplicate exactly aging in service. The aging tests in
of rooms in buildings. This adhesive is required to maintain a
this specification are designed to accelerate the aging process and to test
tensile adhesion (bond strength) of not less than 3.45 3 10 various manifestations of aging, and are intended to be satisfactory for
2 2
comparing one adhesive with another; they do not necessarily reflect aging
dynes/cm ( ⁄2 lb/in. ) for a long period of time under the
characteristics on an absolute basis. Purchasers of adhesives should
temperature and moisture conditions likely to be encountered
receive from the manufacturer additional warranties and assurances of
and to maintain sufficient plasticity to allow for movement of
performance of the adhesive under normal aging.
parts of the building as it ages.
NOTE 6—Erection Practices—Proper erection techniques are essential
for proper performance of any acoustical adhesive. Use of a material
NOTE 1—Cleanliness of Surface—The surface to which the acoustical
meeting this specification will not in itself guarantee satisfactory perfor-
material is applied with the adhesive should be clean, sound, and dry.
mance. Only when tiles are applied by skilled and experienced workers
Surface coatings should be removed if their nature indicates an unsatis-
following instructions from the manufacturer can the purchaser be assured
factory installation, so that the adhesive can be applied to the base. When
of satisfactory performance of an adhesive.
the adhesive is to be applied on a painted surface, test tile should be
applied for 48 h to determine suitable adherence of the coating by
1.2 The values stated in SI units are to be regarded as the
examination. Acoustical adhesives are not intended to be applied to
standard. The values given in parentheses are for information
surfaces that are moist and that have an alkaline reaction, or that may later
only.
become moist or alkaline. Such surfaces, as concrete or plaster, should be
1.3 This standard does not purport to address all of the
properly dried and aged before applying the adhesive.
safety concerns, if any, associated with its use. It is the
NOTE 2—Load—This adhesive is not recommended as a sole means of
2 2
holding acoustical materials weighing more than 121 kg/m (2 ⁄2 lb/ft )to responsibility of the user of this standard to establish appro-
ceiling surfaces.
priate safety and health practices and determine the applica-
NOTE 3—Amount and Condition of Material—It is recommended that
bility of regulatory limitations prior to use.
sufficient adhesive be used so that there is a contact surface of not less than
4 2 2 2 2
1.2 3 10 cm /m (20 in. /ft ) of acoustical material, with a minimum
2. Referenced Documents
thickness of 0.3 cm ( ⁄8 in.) and that the adhesive be applied in four
2.1 ASTM Standards:
separate nearly spherical portions of approximately equal size near the
C 37 Specification for Gypsum Lath
corners for a standard 30.5 by 30.5-cm (12 by 12-in.) tile. Fewer than or
more than four portions for 30.5 by 30.5-cm tile are not recommended due D 618 Practice for Conditioning Plastics and Electrical
to difficulty in leveling and in securing effective contact area on all
Insulating Materials for Testing
portions. Adhesives that are hard, or do not wet the surface, or are difficult
D 907 Terminology of Adhesives
to spread should not be used.
E 104 Practice for Maintaining Constant Relative Humidity
NOTE 4—Rigidity of Base Surfaces—It is necessary that the material
by Means of Aqueous Solutions
forming the base to which the adhesive is attached should be relatively
2.2 Federal Specification:
smooth, firm, and rigid. If the pressure of applying tile and adhesive
MMM-A—00150B Interim Federal Specification for
causes the base material to deflect excessively, tile previously applied may
Acoustical Materials
1 2
This specification is under the jurisdiction of ASTM Committee D-14 on Annual Book of ASTM Standards, Vol 04.01.
Adhesives and is the direct responsibility of Subcommittee D14.70 on Construction Annual Book of ASTM Standards, Vol 08.01.
Adhesives. Annual Book of ASTM Standards, Vol 15.06
Current edition approved March 10, 1998. Published March 1999. Originally Annual Book of ASTM Standards, Vol 11.03.
issued 1960. Replaced D 1779 – 60 T. Discontinued 1993 and reinstated as Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
D 1779 – 98. Robbins Ave., Philadelphia, PA 19111–5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 1779
3. Terminology 7. Test Methods
3.1 Definitions—Many terms in this specification are de-
7.1 Determine the properties enumerated in this specifica-
fined in Terminology D 907.
tion in accordance with the following test methods:
7.1.1 Consistency—Determine the consistency of the adhe-
4. General Requirements
sive as received by applying the material to plywood and
4.1 Composition—The adhesive must be of uniform com-
gypsum board surfaces by hand tools at 20 to 30°C (68 to
position. It must be free from all ingredients that will affect the
86°F). The adhesive must spread readily, trowel smoothly
serviceability of the adhesive or have a deleterious effect on the
without drag, adhere to the surfaces, and not sag from walls or
acoustical material or the surface to which the acoustical
drop from ceilings when applied in a thickness of approxi-
material is attached.
mately 0.9 cm ( ⁄8 in.).
4.2 Toxicity—The adhesive must not liberate toxic gases or
7.1.2 Wetting—Place a fresh portion of the adhesive ap-
fumes under normal conditions of use and application, nor
proximately 2.54 cm (1 in.) thick at a temperature of 20 to
shall it contain irritating substances. The adhesive must contain
30°C (68 to 86°F) on clean surfaces of plywood and of gypsum
no more than 0.5 % of benzene or volatile chlorinated hydro-
board. Press the adhesive immediately with a flat hand tool
carbon solvent.
such as a trowel or putty knife to a thickness of about 0.6 cm
4.3 Workmanship—The ingredients and processes used
( ⁄4 in.). Immediately thereafter withdraw the hand tool verti-
must be an adhesive for acoustical materials meeting the
cally without sliding; on withdrawal the area that was under the
requirements of this specification.
hand tool shall be completely coated with adhesive.
5. Detail Requirements
7.1.3 Strength—Determine the strength with a tensile-
adhesion specimen subjected to the dead-weight loads under
5.1 Consistency—The initial consistency of the adhesive
controlled ambient temperatures and relative humidities tha
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