Joint Sealants ME- Building Group

SECTION 079200 - JOINT SEALANTS

PART 1 - GENERAL

1.1  RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2  SUMMARY

  1. This Section includes sealants for the following applications, including those specified by reference to this Section:
  2. Exterior joints in the following vertical surfaces and nontraffic horizontal surfaces:
  3. Control and expansion joints in cast-in-place concrete, except pavement, walkway and curbing that are covered in other specification sections.
  4. Control and expansion joints in unit masonry.
  5. Joints between different materials indicated.
  6. Perimeter joints between materials listed above and frames of doors and windows.
  7. Control and expansion joints in ceiling and overhead surfaces.
  8. Other joints as indicated.
  9. Interior joints in the following vertical surfaces and horizontal nontraffic surfaces:
  10. Perimeter joints of exterior openings where indicated.
  11. Vertical control joints on exposed surfaces of interior unit masonry and concrete walls and partitions.
  12. Perimeter joints between interior wall surfaces and frames of interior doors, windows, and entrances.
  13. Joints between plumbing fixtures and adjoining walls, floors, and counters.
  14. Other joints as indicated.
  15. Interior joints in the following horizontal traffic surfaces:
  16. Control and expansion joints as indicated.
  17. Related Sections
  18. Division03 Section "Industrial Polished Concrete Floor Slabs (With Shake)" joint sealants in polished concrete floors with shake..
  19. Division03 Section "Industrial and Polished Concrete Floor Slabs" joint sealants in polished concrete floors.
  20. Division32 Section "Concrete Pavement Joint Sealants" for joint sealants in exterior concrete paving.

1.3  SUBMITTALS

  1. Product Data: For each joint-sealant product indicated.
  2. LEED Submittal:
  3. Product Data for CreditMR4: For products having recycled content, manufacturer documentation indicating percentages by weight of postconsumer and preconsumer recycled content.
  4. Include statement indicating costs for each product having recycled content.
  5. Product Data for Credit MR 5: For products and materials to comply with requirements for regional materials, provide documentation indicating location of product or material manufacturing location and the point of extraction, harvest, or recovery for each raw material.
  6. Include documentation on distance to project, contractor cost for each regional material, and percent by weight that is considered regional
  7. Product Data for CreditIEQ4.1: For sealants and sealant primers used inside the weatherproofing system, including printed statement of VOC content.

1.4  PERFORMANCE REQUIREMENTS

  1. Provide elastomeric joint sealants that establish and maintain watertight and airtight continuous joint seals without staining or deteriorating joint substrates.

1.5  QUALITY ASSURANCE

  1. Source Limitations: Obtain each type of joint sealant through one source from a single manufacturer.

1.6  DELIVERY, STORAGE, AND HANDLING

  1. Deliver materials to Project site in original unopened containers or bundles with labels indicating manufacturer, product name and designation, color, expiration date, pot life, curing time, and mixing instructions for multicomponent materials.
  2. Store and handle materials in compliance with manufacturer's written instructions to prevent their deterioration or damage due to moisture, high or low temperatures, contaminants, or other causes.

1.7  PROJECT CONDITIONS

  1. Environmental Limitations: Do not proceed with installation of joint sealants under the following conditions:
  2. When ambient and substrate temperature conditions are outside limits permitted by joint sealant manufacturer or are below 40 degF.
  3. When joint substrates are wet.
  4. Joint-Width Conditions: Do not proceed with installation of joint sealants where joint widths are less than those allowed by joint sealant manufacturer for applications indicated.
  5. Joint-Substrate Conditions: Do not proceed with installation of joint sealants until contaminants capable of interfering with adhesion are removed from joint substrates.

PART 2 - PRODUCTS

2.1  MATERIALS, GENERAL

  1. Silicone containing products are not permitted.
  2. 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 sealant manufacturer based on testing and field experience.
  3. VOC Content of Interior Sealants: Provide sealants and sealant primers for use inside the weatherproofing system that comply with SCAQMD Rule #1168 and the following limits for VOC content when calculated according to 40CFR59, Part 59, SubpartD (EPA Method24):
  4. Architectural Sealants: 250 g/L.
  5. Sealant Primers for Nonporous Substrates: 250 g/L.
  6. Sealant Primers for Porous Substrates: 775 g/L.
  7. Colors of Exposed Joint Sealants: Manufacturer’s standard color that is the closest to the lightest adjacent substrate.

2.2  ELASTOMERIC JOINT SEALANTS

  1. Elastomeric Sealant Standard: Comply with ASTMC920 and other requirements indicated for each liquid-applied chemically curing sealant in the Elastomeric Joint-Sealant Schedule at the end of Part3, including those referencing ASTMC920 classifications for type, grade, class, and uses.
  2. Multicomponent Nonsag Urethane Products: Unless otherwise directed by the Owner, provide products by one of the following:
  3. Vulkem 922; Mameco International.
  4. Dynatrol II; Pecora Corporation.
  5. Flexiprene 2000; Polymeric Systems, Inc.
  6. Sikaflex - 2c NS; Sika Corporation.
  7. NP 2; Sonneborn Building Products Div., ChemRex Inc.
  8. Dymeric 511; Tremco.
  9. Multicomponent Pourable Urethane Products: Unless otherwise directed by the Owner, provide products by one of the following:
  10. Chem-Calk 550; Bostik Inc.
  11. Vulkem 245; Mameco International.
  12. Pourthane; W.R. Meadows, Inc.
  13. Elasto-Thane 920 Pourable; Pacific Polymers, Inc.
  14. NR-200 Urexpan; Pecora Corporation.
  15. PSI-270SL; Polymeric Systems, Inc.
  16. Sikaflex - 2c SL; Sika Corporation.
  17. SL 2; Sonneborn Building Products Div., ChemRex Inc.
  18. THC-900; Tremco.
  19. Single-Component Nonsag Urethane Products: Unless otherwise directed by the Owner, provide products by one of the following:
  20. Chem-Calk 900; Chem-Calk 915; or Chem-Calk 945; Bostik Inc.
  21. Vulkem 921; Mameco International.
  22. PR-255; Ohio Sealants, Inc.
  23. Dynatrol I; Pecora Corporation.
  24. Flexiprene 1000; or PSI-901; Polymeric Systems, Inc.
  25. SM7100 Permathane; Schnee-Morehead, Inc.
  26. DyMonic; Tremco.
  27. Single-Component Pourable Products: Unless otherwise directed by the Owner, provide products by one of the following:
  28. Chem-Calk 950; Bostik Inc.
  29. Vulkem 45; Mameco International.
  30. Vulkem Nova 300 SSL; Mameco International.
  31. NR-201; Pecora Corporation.
  32. Flexiprene PSI-951; Polymeric Systems, Inc.
  33. SL 1; Sonneborn Building Products Div., ChemRex Inc..
  34. Additional Movement Capability: Where additional movement capability is specified in the Elastomeric Joint-Sealant Schedule, provide products with the capability, when tested for adhesion and cohesion under maximum cyclic movement per ASTMC719, to withstand the specified percentage change in the joint width existing at the time of installation and remain in compliance with other requirements of ASTMC920 for uses indicated.
  35. Stain-Test-Response Characteristics: Where elastomeric sealants are specified in the Elastomeric Joint-Sealant Schedule to be nonstaining to porous substrates, provide products that have undergone testing according to ASTMC1248 and have not stained porous joint substrates indicated for Project.
  36. Continuous-Immersion-Test-Response Characteristics: Where elastomeric sealants will be immersed continuously in water, provide products that have undergone testing according to ASTMC1247, including initial six-week immersion period and additional immersion periods specified below, and have not failed in adhesion or cohesion when tested with substrates indicated for Project.
  37. Three additional four-week immersion periods.

2.3  LATEX JOINT SEALANTS

  1. Latex Sealant Standard: Comply with ASTMC834.
  2. Products: Unless otherwise directed by the Owner, provide products by one of the following:
  3. Chem-Calk 600; Bostik Inc.
  4. NuFlex 330; NUCO Industries, Inc.
  5. LC 160 All Purpose Acrylic Caulk; Ohio Sealants, Inc.
  6. AC-20; Pecora Corporation.
  7. PSI-701; Polymeric Systems, Inc.
  8. Sonolac; Sonneborn Building Products Div., ChemRex, Inc.
  9. Tremflex 834; Tremco.

2.4  JOINT-SEALANT BACKING

  1. General: Provide sealant backings of material and type 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.
  2. Cylindrical Sealant Backings: ASTMC1330, of type indicated below and of size and density to control sealant depth and otherwise contribute to producing optimum sealant performance:
  3. Type C: Closed-cell material with a surface skin.
  4. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant manufacturer for preventing sealant from adhering to rigid, inflexible joint-filler materials or joint surfaces at back of joint where such adhesion would result in sealant failure. Provide self-adhesive tape where applicable.

2.5  MISCELLANEOUS MATERIALS

  1. 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.
  2. 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 harming joint substrates and adjacent nonporous surfaces in any way, and formulated to promote optimum adhesion of sealants with joint substrates.
  3. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and surfaces adjacent to joints. Leave no residue.

2.6  Preformed Joint Sealants

  1. Preformed Expanding Foam Sealant: Manufacturer's standard preformed, precompressed, open-cell foam sealant that is manufactured from high-density urethane foam impregnated with a nondrying, water-repellent agent; is factory produced in precompressed sizes in roll or stick form to self expand and fill joint widths indicated; is coated on one side with a pressure-sensitive adhesive and covered with protective wrapping; develops a watertight and airtight seal when compressed to the degree specified by manufacturer; and complies with the following:
  2. Products:
  3. Dayton Superior Specialty Chemicals; Polytite Standard.
  4. EMSEAL Joint Systems, Ltd.; Emseal25V.
  5. Sandell Manufacturing Co., Inc.; Polyseal.
  6. Willseal USA, LLC; Willseal600.
  7. Properties: Permanently elastic, mildew resistant, nonmigratory, nonstaining, and compatible with joint substrates and other joint sealants.
  8. Density: Manufacturer's standard

PART 3 - EXECUTION

3.1  EXAMINATION

  1. 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.
  2. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2  PREPARATION

  1. 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:
  2. 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.
  3. Clean porous joint substrate surfaces by brushing, grinding, blast cleaning, 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 from above cleaning operations by vacuuming or blowing out joints with oil-free compressed air. Porous joint surfaces include the following:
  4. Concrete.
  5. Masonry.
  6. Unglazed surfaces of ceramic tile.
  7. Remove laitance and form-release agents from concrete.
  8. Clean nonporous surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of joint sealants.
  9. Metal.
  10. Glass.
  11. Glazed surfaces of ceramic tile.
  12. Joint Priming: Prime joint substrates where recommended in writing by joint sealant manufacturer, based on 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.
  13. Masking Tape: Use masking tape where required to prevent contact of sealant with adjoining surfaces that otherwise would be permanently stained or damaged by such contact or by cleaning methods required to remove sealant smears. Remove tape immediately after tooling without disturbing joint seal.

3.3  INSTALLATION OF JOINT SEALANTS

  1. General: Comply with joint sealant manufacturer's written installation instructions for products and applications indicated, unless more stringent requirements apply.
  2. Sealant Installation Standard: Comply with recommendations of ASTMC1193 for use of joint sealants as applicable to materials, applications, and conditions indicated.
  3. Install sealant backings of type 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.
  4. Do not leave gaps between ends of sealant backings.
  5. Do not stretch, twist, puncture, or tear sealant backings.
  6. Remove absorbent sealant backings that have become wet before sealant application and replace them with dry materials.
  7. Install bond-breaker tape behind sealants where sealant backings are not used between sealants and back of joints.
  8. Install sealants by proven techniques to comply with the following and at the same time backings are installed:
  9. Place sealants so they directly contact and fully wet joint substrates.
  10. Completely fill recesses provided for each joint configuration.
  11. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow optimum sealant movement capability.
  12. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or curing begins, tool sealants according to requirements specified 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.
  13. Remove excess sealants from surfaces adjacent to joint.
  14. Use tooling agents that are approved in writing by sealant manufacturer and that do not discolor sealants or adjacent surfaces.
  15. Provide concave joint configuration per Figure8A in ASTMC1193, unless otherwise indicated.
  16. Installation of Preformed Expanding Foam Sealants: Install each length of sealant immediately after removing protective wrapping, taking care not to pull or stretch material, producing seal continuity at ends, turns, and intersections of joints. For applications at low ambient temperatures where expansion of sealant requires acceleration to produce seal, apply heat to sealant in compliance with sealant manufacturer's written instructions.

3.4  CLEANING

  1. Clean off excess sealants 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.

3.5  PROTECTION

  1. 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 the original work.

3.6  JOINT-SEALANT SCHEDULE

  1. Multicomponent Nonsag Urethane Sealant
  2. Applications: Exterior vertical joints between different materials or systems.
  3. Type and Grade: M (multicomponent) and NS (nonsag).
  4. Class: 25.
  5. Additional Movement Capability: 50 percent movement in extension and 50 percent in compression for a total of 100 percent movement.
  6. Use Related to Exposure: NT (nontraffic).
  7. Uses Related to Joint Substrates: M, G, A, and, as applicable to joint substrates indicated, O.
  8. Use O Joint Substrates: Color anodic aluminum, galvanized steel, and ceramic tile.
  9. Multicomponent Pourable UrethaneSealant
  10. Applications: Exterior pavement joints between threshold and sidewalk or door pads. Horizontal traffic surfaces of Toilet Rooms; except at fixtures.
  11. Type and Grade: M (multicomponent) and P (pourable).
  12. Class: 25.
  13. Use Related to Exposure: T (traffic).
  14. Uses Related to Joint Substrates: M, A, and, as applicable to joint substrates indicated, O.
  15. Single-Component Nonsag UrethaneSealant
  16. Applications: Vertical surfaces in toilet rooms where toilet fixtures and accessories meet adjacent surfaces.
  17. Type and Grade: S (single component) and NS (nonsag).
  18. Class: 25.
  19. Use Related to Exposure: NT (nontraffic).
  20. Uses Related to Joint Substrates: M, G, A, and, as applicable to joint substrates indicated, O.
  21. Use O Joint Substrates: Ceramic tile, and porcelain.
  22. Single-Component Pourable Urethane Sealant
  23. Applications: Interior floor slab joints not having floor slab specified per Division 3 Section "Concrete Floor Slabs," and between threshold and sidewalk or door pads.
  24. Type and Grade: S (single component) and P (pourable).
  25. Class: 25.
  26. Use Related to Exposure: T (traffic).
  27. Uses Related to Joint Substrates: M, A, and, as applicable to joint substrates indicated, O.
  28. Latex Sealant
  29. Applications: General Interior joints on vertical substrates.

END OF SECTION