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    • Product Name:SS621 Silicone Structural Sealant
    • Product Number:SS621
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  • SS621 Silicone Structural Sealant

    DESCRIPTION

    SS621 Silicone Structural Sealant is a one-component, high strength neutral curing silicone sealant designed and tested for structurally glazed curtain wall applications. The material is supplied as a paste, which cures into an extremely tough elastomeric silicone rubber ensuring a durable, flexible, watertight bond upon exposure to atmospheric moisture.

    CHARACTERISTICS

    High strength

    Odorless, non-corrosive cure system

    Excellent weatherability and high resistance to ultraviolet radiation, heat and humidity, ozone and temperature extremes

    Remains flexible over a temperature range of -58°F(-50°C) to 302°F(150°C)

    Successfully tested for use in protective glazing applications

    Excellent unprimed adhesion to wide range of substrates including coated, enameled and reflective glasses, anodized and polyester coated or painted aluminum profiles

    Good compatibility with other neutral silicone sealants

    Meets global standards for structural glazing (American, China, Europe)

    APPLICATIONS

    Silicone structural glazing in curtain wall; such as factory glazing of unitized curtain wall systems or in field constructed stick curtain wall systems.

    Structural attachment of many panel systems.

    Protective glazing applications.

    Panel stiffener applications.

    TYPICAL PROPERTIES

    Property

    Result

    Test method

    As Supplied

    Color

    Black, grey, white

    Tack free time(23°C/73°F, 50% RH)

    65 minutes

    ASTM C679

    Full Adhesion

    7-14 days

    Flow, Sag or Slump

    0.1 inches max

    ASTM D2202

    Working Time

    10-15 minutes

    As Cured

    Durometer Hardness, Shore A

    47

    ASTM D2240

    Ultimate Tensile Strength

    1.3MPa

    ASTM C1135

    Specifications: Typical property data values should not be used as specifications. Assistance with specifications are available by contacting Guangzhou Baiyun Chemical Industry CO., LTD.

    APPLICABLE STANDARDS

    SS621 Silicone Structural Sealant meets or exceeds the requirements of the following specifications for one-part sealants.

    ASTM Specifications:

    C1184, Type S, Use G and O

    China Standard:

    GB 16776

    Shelf Life: 12 months from the manufacture date stored in cool & dry place below 27 °C.

    COLORS

    SS621 Silicone Structural Sealant is available in black, gray, white or other colors on request.

    PACKAGING

    300 ml  plastic caulking cartridges,24pcs/Carton.

    590 ml   foil sausage packs.  20pcs/Carton

    LIMITATIONS

    SS621 Silicone Structural Sealant should not be used, applied or is not recommended:

    In structural glazing applications unless Guangzhou Baiyun Chemical Industry CO., LTD. has reviewed shop drawings for applicability and has performed adhesion and compatibility tests on project substrates, spacer materials and all accompanying accessories. Review and testing is done on a project-by-project basis. No blanket approval is given by Guangzhou Baiyun Chemical Industry CO., LTD. for structural glazing applications. Structural glazing industry guidelines (ASTM C1401) suggest that drawings and details are to be reviewed by all parties involved in the manufacture of an SSG system and for each building project.

    To building materials that bleed oils, plasticizers or solvents – materials such as impregnated wood, oil-based caulks, green or partially vulcanized rubber gaskets or tapes

    In totally confined spaces as the sealant requires atmospheric moisture for cure

    When surface temperatures below 10oC (50oF) or exceed 40oC (104oF)

    Where painting of the sealant is required, as the paint film may crack and peel

    In below-grade applications

    For use as an interior penetration fire stop sealing system

    In horizontal floor joints where abrasion and physical abuse are likely to be encountered

    To frost-laden or damp surfaces

    For structural adhesion on bare metals or surfaces subject to corrosion (i.e., mill aluminum, bare steel, etc.)

    For contact with strong acids or bases

    To surfaces in contact with food

    For continuous immersion in water

    This product is neither tested nor represented as suitable for medical or pharmaceutical uses.

    TECHNICAL SERVICES

    Complete technical information and literature are available from Guangzhou Baiyun Chemical Industry CO., LTD.

    The following materials are required to be submitted to Guangzhou Baiyun Chemical Industry CO., LTD. to receive suggestions for the use of SS621 Silicone Structural Sealant.

    Architectural and shop drawings for review and comment.

    Design wind load requirement(s) for project.

    Glass or panel sizes.

    Production samples of metal, glass, gaskets, spacers and setting blocks with type and manufacturer identified.

    Specification and/or identification of paint or finish to which SS621 Silicone Structural Sealant is intended to adhere (i.e., 215-R1 anodized or if paint; manufacturer, finish system and ID#).

    Guangzhou Baiyun Chemical Industry CO., LTD. will provide the following, after reviewing the materials above:

    Determination as to whether the submitted joint dimensions meet the minimum design criteria necessary for the use of SS621 Silicone Structural Sealant.

    Short-term adhesion data using (typically) the ASTM C794 and/or ASTM C1135 test method. Other test methods may be employed.

    Short-term compatibility test results on gaskets, spacers and setting blocks and other accessories per ASTM C1087 or Guangzhou Baiyun Chemical Industry CO., LTD. test method for compatibility.

    Information regarding suggested primers, when required.

    Guangzhou Baiyun Chemical Industry CO., LTD. will not:

    Design sealant joints.

    Provide comments on the structural integrity of overall framing system(s).

    Provide long-term performance data.

    The design professional has final responsibility for the determination of structural sealant joint dimensions based on project conditions, design wind load(s), glass or panel sizes, anticipated thermal, seismic or other movement of the system.

    The ASTM C1401 Standard Guide for Structural Sealant Glazing provides a thorough overview of design topics and information for use in SSG systems.

    INSTALLATION

    Surface Preparation

    Sealants may not adhere or maintain long-term adhesion to substrates if the surface is not prepared and cleaned properly before sealant application. Using proper materials and following prescribed surface preparation and cleaning procedures is vital for sealant adhesion. Guangzhou Baiyun Chemical Industry CO., LTD. can provide quality control information and suggestions to user upon request.

    Materials

    Use clean, fresh solvent as recommended by the sealant manufacturer’s test report. When handling solvents, refer to manufacturer’s MSDS for information on handling, safety and personal protective equipment. Isopropyl Alcohol (IPA) is commonly used and has proven useful for most substrates encountered in SSG systems. Xylene and Toluene have also been found useful on many substrates.

    Use clean, white cloths free of lint or other lint-free wiping materials.

    Use a clean, narrow-blade putty knife when tooling structural silicone into the cavity.

    Use primer when required.

    Cleaning Procedures

    Remove all loose material (such as dirt and dust), plus any oil, frost or other contaminants from the substrates to which the structural silicone will be adhered.

    Do not use detergent to clean the substrate as residue may be left on the surface.

    Clean the substrates receiving the sealant as follows: Using a two-rag wipe technique. Wet one rag with solvent and wipe the surface with it, then use the second rag to wipe the wet solvent from the surface BEFORE it evaporates. Allowing solvent to dry on the surface without wiping with a second cloth can negate the entire cleaning procedure because the contaminants may be re-deposited as the solvent dries.

    Change the cleaning rags frequently, as they become soiled. It is easier to see the soiling if white rags are used. Do not dip used wipe cloths into solvent as this can contaminate the solvent. Cleaning with contaminated solvent can result in sealant adhesion issues. Always use clean containers for solvent use and for solvent storage.

    When cleaning deep, narrow joints, wrap the cleaning cloth around a clean, narrow-blade putty knife. This permits force to be applied to the cleaned surface.

    Clean only as much area as can be sealed in one hour. If cleaned areas are again exposed to rain or contaminants, the surface must be cleaned again.

    Primers

    SS621 Silicone Structural Sealant will bond to many clean surfaces without the aid of a primer. For difficult-to-bond substrates, the use of a primer or special surface preparation should be evaluated. An evaluation should be made for each specific application/substrate to determine quality of bond. When properly used, primers help assure strong and consistent sealant adhesion to surfaces that may be difficult to bond. Most primers are a blend of organic and inorganic chemicals, resins and solvents. Obtaining the proper materials, as well as following the prescribed procedures, is vital to ensure the successful use of primers. PRIMER APPLICATION IS NOT A SUBSTITUTE FOR SURFACE PREPARATION. Consult Guangzhou Baiyun Chemical Industry CO., LTD. primer datasheet(s) for specifics and recommendations for use.

    CAUTION

    Primers may contain solvents. When handling solvents, refer to manufacturer’s MSDS for information on handling, safety and personal protective equipment.

    Masking

    To simplify clean up of excess sealant, use easy to release, pressure sensitive tape to mask adjacent surfaces before applying the structural silicone sealant.

    Start from the top down and overlap the runs. Tool in direction of over-lap so that masking is not disturbed during tooling.

    Remove masking immediately after application of silicone or as soon as possible or practical.

    Drop cloths can be used to cover any surfaces likely to collect excess sealant removed during tooling operations.

    STRUCTURAL GLAZING

    Sealant Application

    Apply the sealant by pushing the bead ahead of the nozzle and making sure that the entire cavity is filled. Tooling should be done neatly, forcing the sealant into contact with the sides of the joint, thus helping to eliminate any internal voids and assuring good substrate contact. AIR POCKETS OR VOIDS WITHIN THE STRUCTURAL CAVITY ARE NOT ACCEPTABLE.

    Due to the smooth consistency of SS621 Silicone Structural Sealant, tooling agents such as water, soap or detergent solutions are not necessary or recommended. Dry tooling is recommended.

    Sealant application is not recommended when the temperature is below 50°F (10°C) or if frost or moisture is present on the surfaces to be sealed.

    SS621 Silicone Structural Sealant works best when applied to surfaces below 104°F (40°C).

    SS621 Silicone Structural Sealant should not be applied in totally confined spaces since the sealant requires atmospheric moisture from the air and release of cure by-products to cure properly and develop typical properties. In a typical SSG cavity, cure depths up to 3/4” from an air interface will generally cure satisfactorily and reach maximum properties within several days. Cure depths > 3/4” may take significantly longer time to cure and when applied in a single application may not cure satisfactorily. Please consult Guangzhou Baiyun Chemical Industry CO., LTD. technical services for additional information on depth of cure for this product.

    The cure rate of this product is dependent upon temperature and the availability of atmospheric moisture. Under Standard Conditions (relative humidity of 50 ±5% at an air temperature of 73.4 ±2°F [23 of ±1°C]) this material can attain a cured thickness of 2-3 mm per 24 hours (assuming ample access to atmospheric moisture). As temperature decreases, the cure rate slows down (and vice versa). Low moisture environments will also reduce the cure rate. Near-confined spaces which limit the overall access to atmospheric moisture will cure only from that surface which has access to the atmosphere. Colder temperatures can significantly increase cure times and can open the possibility of sealant irregularities if joint movement occurs while sealant is not fully cured. The following reference provides additional information on Movement-During-Cure of sealant joints: ASTM C1193 Standard Guide for Use of Joint Sealants; section 12.5.

    Method of Application

    SS621 Silicone Structural Sealant can be dispensed directly from cartridges and foil sausage packs.

    HANDLING AND SAFETY

    PRODUCT SAFETY INFORMATION REQUIRED FOR SAFE USE IS NOT INCLUDED IN THIS DOCUMENT. BEFORE HANDLING, READ PRODUCT AND MATERIAL SAFETY DATA SHEETS AND CONTAINER LABELS FOR SAFE USE, PHYSICAL AND HEALTH HAZARD INFORMATION. THE MATERIAL SAFETY DATA SHEET IS AVAILABLE FROM BAIYUN SALES APPLICATION ENGINEER, OR DISTRIBUTOR, OR BY CALLING BAIYUN CUSTOMER SERVICE.

    USABLE LIFE AND STORAGE

    When stored at or below 27oC (80oF) in the original unopened containers, this product has a usable life of 12 months from the date of manufacture.

    PRODUCT SAFETY

    Customers considering the use of any of Guangzhou Baiyun Chemical Industry CO., LTD. products should consult the latest Material Safety Data Sheets and labels for product safety information. Customers must evaluate Guangzhou Baiyun Chemical Industry CO., LTD. products and make their own determination as to fitness of use in their particular applications. For Material Safety Data Sheets contact the Guangzhou Baiyun Chemical Industry CO., LTD. sales office nearest you. Customers must ensure that all applicable federal, state, and local requirements have been met before handling any of the products mentioned in the text.

    LIMITED WARRANTY INFORMATION – PLEASE READ CAREFULLY

    The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer’s tests to

    ensure that Guangzhou Baiyun Chemical Industry CO., LTD.’s products are safe, effective, and fully satisfactory for the intended end use. Suggestions of use shall not be taken as inducements to infringe any patent.

    Guangzhou Baiyun Chemical Industry CO., LTD.’s sole warranty is that the product will meet the Guangzhou Baiyun Chemical Industry CO., LTD. sales specifications in effect at the time of shipment. Your exclusive remedy for breach of such warranty is limited to refund of purchase price or replacement of any product shown to be other than as warranted.

    GUANGZHOU BAIYUN CHEMICAL INDUSTRY CO., LTD. SPECIFICALLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY.

    GUANGZHOU BAIYUN CHEMICAL INDUSTRY CO., LTD. DISCLAIMS LIABILITY FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.


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