SEALANT SPECIFICATION

1) General
A) Section Includes
i) Silicone glazing sealants.
ii) Structural silicone glazing sealants.
B) References
i) ASTM International (ASTM): www.astm.org:
 ASTM C 510 - Standard Test Method for Staining and Color Change of Single- or
Multicomponent Joint Sealants.
 ASTM C 661 - Standard Test Method for Indentation Hardness of Elastomeric Type Sealants by
Means of a Durometer.
 ASTM C 719 - Standard Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants
Under Cyclic Movement (Hockman Cycle).
 ASTM C 794 - Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
 ASTM C 920 - Specification for Elastomeric Joint Sealants.
 ASTM C 1087 - Test Method for Determining Compatibility of Liquid-Applied Sealants with
Accessories Used in Structural Glazing Systems.
 ASTM C 1184 - Standard Specification for Structural Silicone Sealants.
 ASTM C 1193 - Guide for Use of Joint Sealants.
 ASTM C 1248 - Test Method for Staining of Porous Substrate by Joint Sealants.
 ASTM C 1330 - Cylindrical Sealant Backing for Use with Cold Liquid Applied Sealants.
 ASTM D 412 - Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension.
 ASTM D 624 - Test Method for Tear Strength of Conventional Vulcanized Rubber and
Thermoplastic Elastomers.
 ASTM D 2203 - Standard Test Method for Staining from Sealants.
C) Administrative Requirements
i) Coordination: Coordinate installation of joint sealants with cleaning of joint sealant substrates
and other operations that may impact installation or finished joint sealant work.
ii) Preinstallation Conference: Conduct conference at Project Site.

D) Action Submittals
i) Product Data: For each type of joint sealant product specified, including:
 Preparation instructions and recommendations.
 Standard drawings illustrating manufacturer's recommended sealant joint profiles and
dimensions applicable to Project.
ii) Joint Sealant Schedule: Indicate joint sealant location, joint sealant type, manufacturer and
product name, and color, for each application. Utilize joint sealant designations included in this
Section
iii) Structural Sealant Joint Design: [Submit calculations for Silicone Contact Depth, deadload
support, Thickness, shear, and other relevant parameters contributing to structural joint sealant
design.]
[Submit manufacturer's certificate indicating that drawings, specifications, and design data
provided by Architect have been reviewed and are approved as acceptable application of
manufacturer’s structural silicone sealant and comply with manufacturer’s warranty
requirements.]
 Shop Drawings: Show details of proposed structural sealant joints, indicating dimensions,
materials, Silicone Contact Depth (SCD), Thickness (T), joint profile, and support framing.
iv) Samples for Color Selection: For each joint sealant type.
v) Samples for Verification: For each exposed joint sealant product, for each color selected.
E) Informational Submittals
i) Preconstruction Compatibility and Adhesion Test Reports: From manufacturer. Include written
interpretation of reports and recommendations for primers and substrate preparation.
ii) Preconstruction field-adhesion test reports.
iii) Field quality control adhesion test reports.

Technical Service
Tremco Asia Pte Ltd has a team of experienced Technical Sales Representatives who provide assistance in the selection
and specification of products. For more detailed information, service and advice please email to
gen@tremcoasia.com/sg.
 SEALANT SPECIFICATION

2. Materials, General
a) Compatibility: Provide joint sealants and accessory materials that are compatible with one another, and
with adjacent materials, as demonstrated by sealant manufacturer using ASTM C 1087 testing and related
experience.
b) Joint Sealant Standard: Comply with ASTM C 920 and other specified requirements for each joint
sealant.
c) Stain Test Characteristics: Where sealants are required to be non-staining, provide sealants tested per
ASTM C 1248 as non-staining on porous joint substrates specified.
d) Silicone Glazing Sealants
i) Tremco SG200/ Proglaze II is a high-modulus, two-part sealant consisting of a white base and a
black curing agent that, when mixed through a pump, cures to a tough, flexible rubber. Basic
Usage of SG200 is developed specifically for in-plant, structural glazing and curtain wall
applications where it shortens cure time, reduces glazing/sealing production time. All structural
glazing applications must be reviewed and approved by Tremco & Tremco Illbruck Technical
Services Personnel.
 Multi-Component, Non-sag, Silicone Joint Sealant: Conforms to, ASTM C920 Type M Grade
NS, Class 25, Use NT, G and A. Conforms to ASTM C1184, Use G and O (aluminum).
 Tensile Strength, DIN 53504: >1.00 MPa
 Hardness, EN ISO 868: 35
 Ultimate Tensile Strength, EN ISO 8339: >145 psi (>1.00 Mpa)
 Ultimate Elongation, EN ISO 8339: >200%
 Elastic Recovery, EN ISO 7389: >95%
 Color: Black.

ii) Tremco SG300 is a high-modulus, one-part, high-performance, neutral-cure silicone sealant

ideal for a variety of perimeter caulking and glazing applications. Its basic uses include: 2 sided
and 4-sided structural glazing; perimeter and weather seals; cap, heel and toe beads; curtain wall
and window joints. SG300 may be used on aluminum, glass, steel, painted metal, plastic, stone,
concrete and brick. It exhibits primerless adhesion to many common building materials. Consult
Tremco & Tremco Illbruck Technical Services for structural glazing applications.
 Single-Component, Non-sag, Neutral-Curing Silicone Joint Sealant: Conforms to, ASTM C 920,
Type S, Grade NS, Class 25, Use NT. Conforms to ASTM C1184, Use G and O
 Tensile Strength, DIN 53504: 2 MPa
 Hardness, EN ISO 868: 40
 Ultimate Elongation, EN ISO 8339: 130%, DIN 53 504: 340%
 Color: As selected by Architect from manufacturer's standard line

e) Weatherseal Sealants
i) Tremco SG555 is a low-modulus, single component, high-performance, neutral-cure silicone
sealant ideal for a high degree of joint movement to anticipate such as in structurally glazed
curtain wall or aluminium cladding. SG555 may be used on aluminum, glass, steel, painted
metal, stone, concrete and brick. It exhibits primerless adhesion to many common building
materials. Consult Tremco & Tremco Illbruck Technical Services for weather seal glazing
applications.
 Single-Component, Non-sag, Non-Staining, Neutral-Curing Silicone Joint Sealant:
ASTM C 920, Type S, Grade NS, Class 50, Use NT.
 Tensile Strength, ASTM D 412: 240kP, at 100 percent elongation.
 Peel Strength, ASTM C 794: 27.2 N.
 Hardness, ASTM C 661: 24 durometer Shore A, minimum.
 Staining, ASTM C 1248: None on concrete, marble, granite, limestone, and brick.
 Elongation at break, ASTM D412: 1151%
 Movement capacity, ASTM C 719: +/-50% capability.
 Color: As selected by Architect from manufacturer's standard line

Technical Service
Tremco Asia Pte Ltd has a team of experienced Technical Sales Representatives who provide assistance in the selection
and specification of products. For more detailed information, service and advice please email to
gen@tremcoasia.com/sg.
 SEALANT SPECIFICATION

Technical Service
Tremco Asia Pte Ltd has a team of experienced Technical Sales Representatives who provide assistance in the selection
and specification of products. For more detailed information, service and advice please email to
gen@tremcoasia.com/sg.
 SEALANT SPECIFICATION
ii) Tremco SG556 is a medium-modulus, one-part, high-performance, neutral-cure weather seal
silicone sealant general purpose. Its basic use includes for curtain wall, façade and movement
joints. SG556 may be used on aluminum, glass, steel, painted metal, plastic, concrete and brick.
It exhibits primerless adhesion to many common building materials. Consult Tremco & Tremco
Illbruck Technical Services for weather seal glazing applications.
 Single-Component, Non-sag, Neutral-Curing Silicone Joint Sealant: ASTM C 920, Type S,
Grade NS, Class 30, Use NT.
 Tensile Strength, ASTM D 412: 389kP at 100 percent elongation.
 Peel Strength, ASTM C 794: 51.2 N.
 Hardness, ASTM C 661: 30-40 durometer Shore A.
 Movement capacity, ASTM C 719: +/-30% capability.
 Color: As selected by Architect from manufacturer's standard line

iii) Tremco SG557 is a medium-modulus, single component, neutral-cure and non-staining silicone
sealant which is good for mechanical resistance and adhesion to most common porous and non-
porous building substrates. SG557 may be used on aluminum, glass, steel, painted metal, stone,
concrete and brick. It exhibits primerless adhesion to many common building materials. Consult
Tremco & Tremco Illbruck Technical Services for weather seal glazing applications.
 Single-Component, Non-sag, Non-Staining, Neutral-Curing Silicone Joint Sealant:
ASTM C 920, Type S, Grade NS, Class 25, Use NT.
 Tensile Strength, ASTM D 412: 575kP, at 100 percent elongation.
 Peel Strength, ASTM C 794: 69.7 N.
 Hardness, ASTM C 661: 28 durometer Shore A, minimum.
 Staining, ASTM C 1248: None on concrete, marble, granite, limestone, and brick.
 Elongation at break, ASTM D412: 460%
 Movement capacity, ASTM C 719: +/-25% capability.
 Color: As selected by Architect from manufacturer's standard line

iv) Tremco SG558 is a low-modulus, one-part, high-performance, neutral-cure weather seal silicone
sealant general purpose. Its basic use includes for curtain wall, façade and movement joints.
SG558 may be used on aluminum, glass, steel, painted metal, plastic, concrete and brick. It
exhibits primerless adhesion to many common building materials. Consult Tremco & Tremco
Illbruck Technical Services for weather seal glazing applications.
 Single-Component, Non-sag, Neutral-Curing Silicone Joint Sealant: ASTM C 920, Type S,
Grade NS, Class 50, Use NT.
 Tensile Strength, ASTM D 412: 145-220 psi (10-15 Kgf/cm2)
 Hardness, ASTM C 661: 20-30 durometer Shore A.
 Elongation at break, ASTM D412: 700-800%
 Movement capacity, ASTM C 719: +/-50% capability.
 Color: As selected by Architect from manufacturer's standard line

f) Perimeter Seal to Windows, Doors and Storefront Systems:

SP523 Hybrid Sealant. Pre-engineered, silicone extrusion, with integral dart and/or single or double rib
extruded sheet. The system assembly is adhesively sealed with Hybrid sealant to the window assembly to
provide an airtight and waterproof seal to the structure.
i) Hybrid sealant SP523 by Tremco; same brand as for weather seal silicone sealant. The sealant
must comply with ASTM 920 Type S, Grade NS, Class 25, Use T, NT, M, G, A and O
ii) Tensile strength, DIN 53 504 S2: 0.7N/mm2
iii) Hardness, ASTM C 661: 25 – 50 Shore A
iv) Colour: White and paintable
v) The sealant is good in UV and weather resistance, low odour, solvent and isocyanate free.
vi) Movement capacity, ASTM C719: ± 25% capability

Technical Service
Tremco Asia Pte Ltd has a team of experienced Technical Sales Representatives who provide assistance in the selection
and specification of products. For more detailed information, service and advice please email to
gen@tremcoasia.com/sg.
 SEALANT SPECIFICATION
g) Joint Sealant Accessories
i) Structural Glazing Spacer Tape: SG635 PVC foam tape which is coated both sides with high
tack acrylic adhesive with blue filmic liner for easy release. It has an open cell structure to allow
curing of structural silicone on all sides of joint and compatible with structural silicone
adhesives. It is low thermal conductivity and fast recovery from compression.
ii) Joint Substrate Primers: Substrate primer recommended by sealant manufacturer for application.
iii) Cleaners: Chemical cleaners acceptable to joint sealant manufacturer.
iv) Masking tape: Non-staining, non-absorbent tape product compatible with joint sealants and
adjacent joint surfaces.

3. Execution
a) Examination
i) Examine joint profiles and surfaces to determine if work is ready to receive joint sealants. Verify
joint dimensions are adequate for development of sealant movement capability. Verify joint
surfaces are clean, dry, and adequately cured. Proceed with joint sealant work once conditions
meet sealant manufacturer's written recommendations.
ii) Verify aluminium framing finish material is compatible with proposed sealant.

b) Preparation
i) Structural Silicone Joint Design: Install sealant in joint design configuration recommended by
manufacturer and as follows:
 Thickness: 1/4-inch (6 mm) minimum and not to exceed 1/2 inch (13 mm).
 Silicone Contact Depth: 1/4 inch (6 mm) minimum and equal to or greater than Thickness.
 SCD to T Ratio: 3:1 or less.
 Design and fill joint using manufacturer's recommended sealant application procedures.
 Joint Surface Cleaning: Clean joints prior to installing joint sealants using materials and
methods recommended by sealant manufacturer.
 Remove curing compounds, laitance, form-release agents, dust, and other contaminants.
 Clean nonporous and porous surfaces utilizing chemical cleaners acceptable to sealant
manufacturer.
 Protect elements surrounding the Work of this section from damage or disfiguration. Apply
masking tape to adjacent surfaces when required to prevent damage to finishes from sealant
installation.

c) Sealant Application
i) Sealant and Primer Installation Standard: Comply with ASTM C 1193 and manufacturer's
written instructions.
ii) Joint Backing: Select joint backing materials recommended by sealant manufacturer as
compatible with sealant and adjacent materials. Install backing material at depth required to
produce profile of joint sealant allowing optimal sealant movement.
iii) For structural sealant: Install joint backing to maintain the following joint ratios:
 Joints up to 1/2 inch (13 mm) wide: 1:1 width to depth ratio.
 Joints greater than 1/2 inch (13 mm) wide: 2:1 width to depth ratio; maximum 1/2 inch (13 mm)
joint depth.
iv) For all weather sealants and perimeter sealants:
 Joint shall not be smaller than ¼” (6mm) and no greater than ½” (12mm). Use 2:1 width to depth
ratio up to 1” in width. Consider an “hourglass” shape. Joint designed within sealants movement
capability.
 Joint depth should be sufficient to accept backing materials and proper depth of sealant.
 The number and spacing of joints are critical to performance.
 Joints should be accessible for sealant placement.
 There should be sufficient bonding surface for sealant.
o Window perimeter
o Exposed aggregate facades.
v) Install bond breaker tape over substrates when sealant backings are not used.

Technical Service
Tremco Asia Pte Ltd has a team of experienced Technical Sales Representatives who provide assistance in the selection
and specification of products. For more detailed information, service and advice please email to
gen@tremcoasia.com/sg.
 SEALANT SPECIFICATION
vi) Masking: Mask adjacent surfaces to prevent staining or damage by contact with sealant or
primer.
vii) Joint Priming: Prime joint substrates when recommended by sealant manufacturer or when
indicated by preconstruction testing or experience.
viii) Apply recommended primer using sealant manufacturer's recommended application techniques.
ix) Temporary Glass Support: Use temporary fasteners, clips, two-sided adhesive, and other means
to retain glass panels while sealant is applied and allowed to cure as approved by the design
professional.
x) Liquid Sealant Application: Install sealants using methods recommended by sealant
manufacturer, in depths recommended for application. Apply in continuous operation from
bottom to top of joint vertically and horizontally in a single direction. Apply using adequate
pressure to fill and seal joint width.
xi) Tool sealants immediately with appropriately shaped tool to force sealants against joint backing
and joint substrates, eliminating voids and ensuring full contract.
xii) Install sealant free of air pockets, foreign embedded matter, ridges, and sags.
xiii) Tool exposed joint surface concave using tooling agents approved by sealant manufacturer for
application.
xiv) Allow sealant to fully cure before adhesive is stressed. Use test specimens formed at time of
sealant application to verify curing time. When cured, remove temporary glass supports.
xv) Cleaning: Remove excess sealant using materials and methods approved by sealant
manufacturer that will not damage joint substrate materials.
 Remove masking tape immediately after tooling joint without disturbing seal.
 Remove excess sealant from surfaces while still uncured.

d) Field Quality Control

i) Manufacturer's Field Services: Retain manufacturer's technical representative to observe sealant
mockup installation, perform field pre-construction testing, and to issue reports of observations.
ii) Field-Adhesion Testing: Perform adhesion tests in accordance with manufacturer’s instructions
and with ASTM C 1193, Method A.
 Perform [5] tests for the first [1000 feet (300 m)] of joint length for each kind of sealant and joint
substrate, and one test for each [1000 feet (300 m)] of joint length thereafter or 1 test per each
floor per building elevation, minimum.
 For sealant applied between dissimilar materials, test both sides of joint.
iii) Remove sealants failing adhesion test, clean substrates, reapply sealants, and re-test. Test
adjacent sealants to failed sealants.
iv) Submit report of field adhesion testing to Architect indicating tests, locations, dates, results, and
remedial actions taken.

Technical Service
Tremco Asia Pte Ltd has a team of experienced Technical Sales Representatives who provide assistance in the selection
and specification of products. For more detailed information, service and advice please email to
gen@tremcoasia.com/sg.