HomeMy WebLinkAbout07920.pdf BICKFORD OF CARMEL, IN 12/12/2012
JOINT SEALANTS 07920 - 1
SECTION 07920 - JOINT SEALANTS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Silicone joint sealants.
2. Urethane joint sealants.
3. Latex joint sealants.
B. Related Sections:
1. Division 2 Section "Pavement Joint Sealants" for sealing joints in pavements, walkways,
and curbing.
2. Division 8 Section "Glazing" for glazing sealants.
3. Division 9 Section "Gypsum Board" for sealing perimeter joints.
4. Division 9 Section "Ceramic Tile" for sealing tile joints.
5. Division 9 Section "Acoustical Tile Ceilings" for sealing edge moldings at perimeters with
acoustical sealants.
1.3 PRECONSTRUCTION TESTING
A. Preconstruction Compatibility and Adhesion Testing: Submit to joint-sealant manufacturers, for
testing indicated below, samples of materials that will contact or affect joint sealants.
1. Use manufacturer's standard test method to determine whether priming and other
specific joint preparation techniques are required to obtain rapid, optimum adhesion of
joint sealants to joint substrates.
2. Submit not fewer than eight pieces of each kind of material, including joint substrates,
shims, joint-sealant backings, secondary seals, and miscellaneous materials.
3. Schedule sufficient time for testing and analyzing results to prevent delaying the Work.
4. For materials failing tests, obtain joint-sealant manufacturer's written instructions for
corrective measures including use of specially formulated primers.
5. Testing will not be required if joint-sealant manufacturers submit joint preparation data
that are based on previous testing, not older than 24 months, of sealant products for
adhesion to, and compatibility with, joint substrates and other materials matching those
submitted.
B. Preconstruction Field-Adhesion Testing: Before installing sealants, field test their adhesion to
Project joint substrates as follows:
1. Locate test joints where indicated on Project or, if not indicated, as directed by Architect.
2. Conduct field tests for each application indicated below:
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a. Each kind of sealant and joint substrate indicated.
3. Notify Architect seven days in advance of dates and times when test joints will be
erected.
4. Arrange for tests to take place with joint-sealant manufacturer's technical representative
present.
a. Test Method: Test joint sealants according to Method A, Field-Applied Sealant
Joint Hand Pull Tab, in Appendix X1 in ASTM C 1193 or Method A, Tail Procedure,
in ASTM C 1521.
1) For joints with dissimilar substrates, verify adhesion to each substrate
separately; extend cut along one side, verifying adhesion to opposite side.
Repeat procedure for opposite side.
5. Report whether sealant failed to adhere to joint substrates or tore cohesively. Include
data on pull distance used to test each kind of product and joint substrate. For sealants
that fail adhesively, retest until satisfactory adhesion is obtained.
6. Evaluation of Preconstruction Field-Adhesion-Test Results: Sealants not evidencing
adhesive failure from testing, in absence of other indications of noncompliance with
requirements, will be considered satisfactory. Do not use sealants that fail to adhere to
joint substrates during testing.
1.4 SUBMITTALS
A. Product Data: For each joint-sealant product indicated.
B. Samples for Initial Selection: Manufacturer's color charts consisting of strips of cured sealants
showing the full range of colors available for each product exposed to view.
C. Qualification Data: For qualified Installer and testing agency.
D. Product Certificates: For each kind of joint sealant and accessory, from manufacturer.
E. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, indicating that sealants comply with requirements.
F. Preconstruction Compatibility and Adhesion Test Reports: From sealant manufacturer,
indicating the following:
1. Materials forming joint substrates and joint-sealant backings have been tested for
compatibility and adhesion with joint sealants.
2. Interpretation of test results and written recommendations for primers and substrate
preparation needed for adhesion.
G. Preconstruction Field-Adhesion Test Reports: Indicate which sealants and joint preparation
methods resulted in optimum adhesion to joint substrates based on testing specified in
"Preconstruction Testing" Article.
H. Warranties: Sample of special warranties.
1.5 QUALITY ASSURANCE
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A. Installer Qualifications: Manufacturer's authorized representative who is trained and approved
for installation of units required for this Project.
B. Source Limitations: Obtain each kind of joint sealant from single source from single
manufacturer.
1.6 PROJECT CONDITIONS
A. Do not proceed with installation of joint sealants under the following conditions:
1. When ambient and substrate temperature conditions are outside limits permitted by joint-
sealant manufacturer or are below 40 deg F (5 deg C).
2. When joint substrates are wet.
3. Where joint widths are less than those allowed by joint-sealant manufacturer for
applications indicated.
4. Where contaminants capable of interfering with adhesion have not yet been removed
from joint substrates.
1.7 WARRANTY
A. Special warranties specified in this article exclude deterioration or failure of joint sealants from
the following:
1. Movement of the structure caused by structural settlement or errors attributable to design
or construction resulting in stresses on the sealant exceeding sealant manufacturer's
written specifications for sealant elongation and compression.
2. Disintegration of joint substrates from natural causes exceeding design specifications.
3. Mechanical damage caused by individuals, tools, or other outside agents.
4. Changes in sealant appearance caused by accumulation of dirt or other atmospheric
contaminants.
PART 2 - PRODUCTS
2.1 MATERIALS, GENERAL
A. Compatibility: Provide joint sealants, backings, and other related materials that are compatible
with one another and with joint substrates under conditions of service and application, as
demonstrated by joint-sealant manufacturer, based on testing and field experience.
B. Liquid-Applied Joint Sealants: Comply with ASTM C 920 and other requirements indicated for
each liquid-applied joint sealant specified, including those referencing ASTM C 920
classifications for type, grade, class, and uses related to exposure and joint substrates.
1. Suitability for Immersion in Liquids. Where sealants are indicated for Use I for joints that
will be continuously immersed in liquids, provide products that have undergone testing
according to ASTM C 1247. Liquid used for testing sealants is deionized water, unless
otherwise indicated.
C. Stain-Test-Response Characteristics: Where sealants are specified to be nonstaining to porous
substrates, provide products that have undergone testing according to ASTM C 1248 and have
not stained porous joint substrates indicated for Project.
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D. Suitability for Contact with Food: Where sealants are indicated for joints that will come in
repeated contact with food, provide products that comply with 21 CFR 177.2600.
E. Colors of Exposed Joint Sealants: As selected by Architect from manufacturer's full range.
2.2 SILICONE JOINT SEALANTS
A. Single-Component, Nonsag, Neutral-Curing Silicone Joint Sealant: ASTM C 920, Type S,
Grade NS, Class 100/50, for Use NT.
B. Single-Component, Nonsag, Neutral-Curing Silicone Joint Sealant: ASTM C 920, Type S,
Grade NS, Class 25, for Use NT.
C. Mildew-Resistant, Single-Component, Nonsag, Neutral-Curing Silicone Joint Sealant:
ASTM C 920, Type S, Grade NS, Class 25, for Use NT.
2.3 URETHANE JOINT SEALANTS
A. Single-Component, Nonsag, Urethane Joint Sealant: ASTM C 920, Type S, Grade NS,
Class 100/50, for Use NT.
B. Single-Component, Nonsag, Urethane Joint Sealant: ASTM C 920, Type S, Grade NS,
Class 25, for Use NT.
C. Single-Component, Pourable, Traffic-Grade, Urethane Joint Sealant: ASTM C 920, Type S,
Grade P, Class 25, for Use T.
2.4 LATEX JOINT SEALANTS
A. Latex Joint Sealant: Acrylic latex or siliconized acrylic latex, ASTM C 834, Type OP, Grade NF.
2.5 JOINT SEALANT BACKING
A. General: Provide sealant backings of material that are nonstaining; are compatible with joint
substrates, sealants, primers, and other joint fillers; and are approved for applications indicated
by sealant manufacturer based on field experience and laboratory testing.
B. Cylindrical Sealant Backings: ASTM C 1330, Type O (open-cell material) or any of the
preceding types, as approved in writing by joint-sealant manufacturer for joint application
indicated, and of size and density to control sealant depth and otherwise contribute to producing
optimum sealant performance.
2.6 MISCELLANEOUS MATERIALS
A. Primer: Material recommended by joint-sealant manufacturer where required for adhesion of
sealant to joint substrates indicated, as determined from preconstruction joint-sealant-substrate
tests and field tests.
B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants
and sealant backing materials, free of oily residues or other substances capable of staining or
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harming joint substrates and adjacent nonporous surfaces in any way, and formulated to
promote optimum adhesion of sealants to joint substrates.
C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and surfaces
adjacent to joints.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine joints indicated to receive joint sealants, with Installer present, for compliance with
requirements for joint configuration, installation tolerances, and other conditions affecting joint-
sealant performance.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to
comply with joint-sealant manufacturer's written instructions and the following requirements:
1. Remove all foreign material from joint substrates that could interfere with adhesion of
joint sealant, including dust, paints (except for permanent, protective coatings tested and
approved for sealant adhesion and compatibility by sealant manufacturer), old joint
sealants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost.
2. Clean porous joint substrate surfaces by brushing, grinding, mechanical abrading, or a
combination of these methods to produce a clean, sound substrate capable of developing
optimum bond with joint sealants. Remove loose particles remaining after cleaning
operations above by vacuuming or blowing out joints with oil-free compressed air.
Porous joint substrates include the following:
a. Concrete.
b. Unglazed surfaces of ceramic tile.
3. Remove laitance and form-release agents from concrete.
4. Clean nonporous joint substrate surfaces with chemical cleaners or other means that do
not stain, harm substrates, or leave residues capable of interfering with adhesion of joint
sealants. Nonporous joint substrates include the following:
a. Metal.
b. Glass.
c. Porcelain enamel.
d. Glazed surfaces of ceramic tile.
B. Joint Priming: Prime joint substrates where recommended by joint-sealant manufacturer or as
indicated by preconstruction joint-sealant-substrate tests or prior experience. Apply primer to
comply with joint-sealant manufacturer's written instructions. Confine primers to areas of joint-
sealant bond; do not allow spillage or migration onto adjoining surfaces.
C. Masking Tape: Use masking tape where required to prevent contact of sealant or primer with
adjoining surfaces that otherwise would be permanently stained or damaged by such contact or
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by cleaning methods required to remove sealant smears. Remove tape immediately after
tooling without disturbing joint seal.
3.3 INSTALLATION OF JOINT SEALANTS
A. General: Comply with joint-sealant manufacturer's written installation instructions for products
and applications indicated, unless more stringent requirements apply.
B. Sealant Installation Standard: Comply with recommendations in ASTM C 1193 for use of joint
sealants as applicable to materials, applications, and conditions indicated.
C. Install sealant backings of kind indicated to support sealants during application and at position
required to produce cross-sectional shapes and depths of installed sealants relative to joint
widths that allow optimum sealant movement capability.
1. Do not leave gaps between ends of sealant backings.
2. Do not stretch, twist, puncture, or tear sealant backings.
3. Remove absorbent sealant backings that have become wet before sealant application
and replace them with dry materials.
D. Install bond-breaker tape behind sealants where sealant backings are not used between
sealants and backs of joints.
E. Install sealants using proven techniques that comply with the following and at the same time
backings are installed:
1. Place sealants so they directly contact and fully wet joint substrates.
2. Completely fill recesses in each joint configuration.
3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow
optimum sealant movement capability.
F. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or
curing begins, tool sealants according to requirements specified in subparagraphs below to form
smooth, uniform beads of configuration indicated; to eliminate air pockets; and to ensure
contact and adhesion of sealant with sides of joint.
1. Remove excess sealant from surfaces adjacent to joints.
2. Use tooling agents that are approved in writing by sealant manufacturer and that do not
discolor sealants or adjacent surfaces.
3. Provide concave joint profile per Figure 8A in ASTM C 1193, unless otherwise indicated.
4. Provide flush joint profile where indicated per Figure 8B in ASTM C 1193.
5. Provide recessed joint configuration of recess depth and at locations indicated per
Figure 8C in ASTM C 1193.
a. Use masking tape to protect surfaces adjacent to recessed tooled joints.
3.4 FIELD QUALITY CONTROL
A. Evaluation of Field-Adhesion Test Results: Sealants not evidencing adhesive failure from
testing or noncompliance with other indicated requirements will be considered satisfactory.
Remove sealants that fail to adhere to joint substrates during testing or to comply with other
requirements. Retest failed applications until test results prove sealants comply with indicated
requirements.
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3.5 CLEANING
A. Clean off excess sealant or sealant smears adjacent to joints as the Work progresses by
methods and with cleaning materials approved in writing by manufacturers of joint sealants and
of products in which joints occur.
3.6 PROTECTION
A. Protect joint sealants during and after curing period from contact with contaminating substances
and from damage resulting from construction operations or other causes so sealants are without
deterioration or damage at time of Substantial Completion. If, despite such protection, damage
or deterioration occurs, cut out and remove damaged or deteriorated joint sealants immediately
so installations with repaired areas are indistinguishable from original work.
3.7 JOINT-SEALANT SCHEDULE
A. Joint-Sealant Application: Exterior joints in horizontal traffic surfaces.
1. Joint Locations:
a. Isolation and contraction joints in cast-in-place concrete slabs.
2. Urethane Joint Sealant: Single component, pourable, traffic grade.
3. Joint-Sealant Color: As selected by Architect from manufacturer's full range of colors.
B. Joint-Sealant Application: Exterior joints in vertical surfaces and horizontal nontraffic surfaces.
1. Joint Locations:
a. Perimeter joints between materials listed above and frames of doors, windows,
and louvers.
2. Silicone Joint Sealant: Single component, nonsag, neutral curing, Class 100/50 or Single
component, nonsag, neutral curing, Class 25.
3. Urethane Joint Sealant: Single component, nonsag, Class 100/50 or Single component,
nonsag, Class 25.
4. Joint-Sealant Color: As selected by Architect from manufacturer's full range of colors.
C. Joint-Sealant Application: Interior joints in vertical surfaces and horizontal nontraffic surfaces.
1. Joint Locations:
a. Perimeter joints of exterior openings where indicated.
b. Vertical joints on exposed surfaces of walls.
c. Perimeter joints between interior wall surfaces and frames of interior doors
windows and elevator entrances.
2. Joint Sealant: Latex.
3. Joint-Sealant Color: As selected by Architect from manufacturer's full range of colors.
D. Joint-Sealant Application: Mildew-resistant interior joints in vertical surfaces and horizontal
nontraffic surfaces.
1. Joint Sealant Location:
a. Joints between plumbing fixtures and adjoining walls, floors, and counters.
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b. Tile control and expansion joints where indicated.
2. Joint Sealant: Mildew resistant, single component, nonsag, neutral curing, Silicone.
3. Joint-Sealant Color: As selected by Architect from manufacturer's full range of colors.
END OF SECTION 07920