SECTION 07 9200

JOINT SEALants

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LANL MASTER SPECIFICATION

This template must be edited for each project.  In doing so, specifier
must add job-specific requirements.  Brackets are used in the text to
indicate designer choices or locations where text must be supplied by
the designer.  Once the choice is made or text supplied, remove the
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specification requirements for processes, items, or designs that are not
included in the project \-- and specifier's notes such as these.  To
seek a variance from requirements in the specifications that are
applicable, contact the Engineering Standards Manual Architectural
[POC](http://www.lanl.gov/orgs/eng/engstandards/POCs.shtml#arch). Please
contact POC with suggestions for improvement as well.\
\
When assembling a specification package, include applicable
specifications from all Divisions, especially Division 1, General
requirements.\
\
Specification developed for ML-4 projects.  For ML-1, 2, and 3
applications, additional requirements and independent reviews should be
added if increased confidence in procurement or execution is desired;
see ESM Chapter 1 Section Z10 Specifications and Quality sections.\
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1.  GENERAL

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This section includes sealing the enclosure components of a structure
except those that form an integral part of a system. This section should
be referenced in other sections, such as windows, masonry, and like
items, to reduce repetitive specifying of requirements in other
sections.

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1.  summary

    A.  SECTION INCLUDES

        1.  Clean and prepare joint surfaces.

        2.  Sealant and backing materials.

2.  submittals

    A.  Submit the following in accordance with Section 01 3300,
        Submittals:

    B.  Catalog Data: Manufacturer's data sheets on each product to be
        used, including, preparation instructions and recommendations,
        storage and handling requirements and recommendations, as well
        as installation methods. Additional information to include MSDS,
        shelf life and temperature range of storage and application.

    C.  LEED Submittal: Credit EQ 4.1 -- Manufacturers' product data for
        interior sealants including printed statement of VOC content.

    D.  Samples: Sealant colors for each type of sealant used.

    E.  Warranty: As specified herein.

3.  QUALITY ASSURANCE

    A.  Installer qualifications: Trained, experienced, and approved or
        licensed by manufacturer for installation of sealant to be
        applied.

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

4.  DELIVERY, STORAGE, AND HANDLING

    A.  Comply with Section 01 6000 Product Requirements.

    B.  Store products in manufacturer\'s unopened packaging, with
        labels intact, until ready for installation.

    C.  Store products off ground; if stored on roof, do not exceed
        structural capacity of deck.

    D.  Store materials at minimum of 68 degrees F for at least 24 hours
        prior to installation, regardless of temperature at location.

    E.  Do not allow materials to freeze prior to application.

5.  WARRANTY

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A requirement for an extended warranty should apply only to sealants
that, because of the nature of their application location, are
susceptible to improper installation or deterioration. Include only if
longer than for one year.

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A.  Duration: Provide \[ \] year warranty.

B.  Coverage: Replace sealants that fail because of loss of cohesion or
    adhesion onto surfaces applied or that do not cure. If the sealant
    can be detached from a surface by rubbing the surface contact point
    with a finger, than the surface adhesion is inadequate.

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2.  PRODUCTS

    1.  PRODUCT OPTIONS AND SUBSTITUTIONs

        A.  Comply with Section 01 2500, Substitution Procedures.

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    1.  SEALANT MATERIALS

        A.  General: VOC Content of Interior Sealants -- Provide
            interior sealants and sealant primers that comply with the
            following limits for VOC content when calculated according
            to 40 CFR 59, Subpart D (EPA Method 24):

            1.  Sealants: 250 g/L

            2.  Sealant Primers for Nonporous Substrates: 250 g/L

            3.  Sealant Primers for Porous Substrates: 775 g/L

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Basic caulk (use for metal to glass or other minimal expansive material
sealant situations).

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B.  Sealant: Polysulphide base, single component, chemical curing;
    capable of being continuously immersed in water, withstand movement
    up to 20 percent of joint width and being satisfactorily applied
    throughout a temperature range to 40 - 80 degrees F shore A hardness
    of 15 minimum and 50 maximum; nonstaining and nonbleeding; color \[
    \].

C.  Sealant: Polysulphide base, two component, chemical curing;
    \[self-leveling type for application in horizontal joints\]
    \[nonsagging type for application in vertical joint\]; uniform,
    homogeneous, and free from lumps, skins, and coarse particles when
    mixed; capable of being continuously immersed in water, withstanding
    movement up to 25 percent of joint width and being satisfactorily
    applied throughout a temperature range of 40 - 80 degrees F; shore A
    hardness of 15 minimum and 50 maximum; nonstaining and nonbleeding;
    color \[ \].

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Silicone base, single-component, solvent-curing sealant {use for
metal-to-metal or other material sealant situations}.

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D.  Sealant: Silicone base, single component, solvent curing; capable of
    withstanding movement of up to 25 percent of joint width and being
    satisfactorily applied throughout a temperature range of 40 - 80
    degrees F; shore A hardness of 50 maximum; nonstaining; color \[ \].

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Silicone base, single-component, chemical-curing sealant {use for metal
to metal or other high expansion sealant situations (will not hold up
under LANL UV conditions longer than 3 years).

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E.  Sealant: Silicone base, single component, chemical curing; capable
    of withstanding movement of up to 50 percent of joint width and
    being satisfactorily applied throughout a temperature range of 40 -
    80 degrees F; shore A hardness of 50 maximum; nonstaining; color \[
    \].

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Acrylic base, single-component, solvent-curing sealant (use for general
paint applications or other minimal expansive sealant situations).

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F.  Sealant: Acrylic base, single component, solvent curing; capable of
    being continuously immersed in water, withstanding movement of up to
    7.5 percent of joint width and being satisfactorily applied
    throughout a temperature range of 40 - 80 degrees F; shore A
    hardness of 55 maximum; nonstaining; nonbleeding; nonsagging; color
    \[ \].

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Polyurethane base, multi-component, chemical-curing sealant {use for
high expansion areas, especially good for all roofing caulk applications
at membrane to structure interfaces}.

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G.  Sealant: Polyurethane base, multi-component, chemical curing;
    \[self-leveling type for application in horizontal joints\]
    \[nonsagging type for application in vertical joints\]; capable of
    being continuously immersed in water, withstanding movement of up to
    25 percent of joint width and being satisfactorily applied
    throughout a temperature range of 40 - 80 degrees F; uniform,
    homogeneous, and free from lumps, skins, and coarse particles when
    mixed; shore A hardness of 15 minimum and 50 maximum; nonstaining;
    nonbleeding; color \[ \].

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Polyurethane base, single-component, chemical-curing sealant {use for
high expansion areas, especially good for all roofing caulk applications
at membrane to structure interfaces}.

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H.  Sealant: Polyurethane base, single component, chemical curing;
    \[self-leveling type for application in horizontal joints\]
    \[nonsagging type for application in vertical joints\]; capable of
    being continuously immersed in water, withstanding movement of up to
    25 percent of joint width and being satisfactorily applied
    throughout a temperature range of 40 - 80 degrees F; shore A
    hardness of 15 minimum and 50 maximum; nonstaining; nonbleeding;
    color \[ \].

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Acrylic-emulsion base, single-component sealant {use for general paint
applications, building expansion joints or other minimal expansive
sealant situations}

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I.  Sealant: Acrylic emulsion base, single component, capable of
    withstanding movement of up to 7.5 percent of joint width and being
    satisfactorily applied throughout a temperature range of 40 - 80
    degrees F; shore A hardness of 60 maximum; nonstaining; nonbleeding;
    nonsagging; color \[ \].

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J.  Use either of the following two paragraphs for a concrete sealant.

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1.  Sealant: Hot poured \[synthetic rubber\] \[polymer-based asphalt\],
    in accordance with ASTM D1190 or equal.

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2.  Sealant: Cold-applied, \[two-part liquid neoprene\], or equal.

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2.  ACCESSORIES

    A.  Primer: Non-staining type, recommended by sealant manufacturer
        to suit application.

    B.  Joint Cleaner: Noncorrosive and non-staining type, recommended
        by sealant manufacturer; compatible with joint-forming
        materials.

    C.  Joint Filler: ASTM C 1330; round, type as recommended by sealant
        manufacturer; oversized 30 to 50 percent

    D.  Bond Breaker: Pressure-sensitive tape recommended by sealant
        manufacturer to suit application.

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3.  EXECUTION

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Edit Part 3 to provide only the specific information needed for the
project.

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1.  EXAMINATION

    A.  Prior to installation, notify LANL Subcontract Technical
        Representative (STR) that joint dimensions and physical and
        environmental conditions are suitable for application of joint
        sealers.

    B.  By beginning the Work of this section, Subcontractor warrants it
        has examined and verified that existing conditions are in
        accordance with provisions of 3.1.A.

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1.  PREPARATION

    A.  Clean, prepare, and size joints in accordance with
        manufacturer\'s instructions. Remove any loose materials and
        other foreign matter that might impair adhesion of sealant.

    B.  Verify that joint-shaping materials and release tapes are
        compatible with sealant.

    C.  Examine joint dimensions and size materials to achieve required
        width/depth ratios.

    D.  To allow sealants to perform properly, use joint filler to
        achieve required joint depths.

    E.  Use bond breaker where required.

2.  INSTALLATION

    A.  Perform Work per ASTM \[C1194 for solvent-release\] \[and\]
        \[C1193 for latex-base\] sealants.

    B.  Install sealant per manufacturer\'s instructions.

    C.  Apply sealant within recommended temperature ranges. Consult
        manufacturer when sealant cannot be applied within recommended
        temperature ranges.

    D.  Tool Joints: \[Concave\] \[Channel shaped\] \[As indicated on
        Drawings\].

    E.  Joints: Free of air pockets, foreign embedded matter, ridges,
        and sags.

    F.  Follow manufacturer's recommended cure time before painting or
        overcoating.

END OF SECTION

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Do not delete the following reference information:

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FOR LANL USE ONLY

This project specification is based on LANL Master Specification 07 9200
Rev. 2, dated May 5, 2008.