9.27.4. Sealants

9.27.4. Sealants
9.27.4.1. Required Sealants
  1. Sealant shall be provided where required to prevent the entry of water into the structure.
  2. Sealant shall be provided between masonry, siding or stucco and the adjacent door and window frames or trim, including sills, unless such locations are completely protected from the entry of rain.
  3. Sealant shall be provided at vertical joints between different cladding materials unless the joint is suitably lapped or flashed to prevent the entry of rain. (See Articles 9.7.6.2., 9.20.13.12. and 9.28.1.5.)
9.27.4.2. Materials
  1. Sealants shall be
    1. a non-hardening type suitable for exterior use,
    2. selected for their ability to resist the effects of weathering, and
    3. compatible with and adhere to the substrate to which they are applied. (See Note A-9.27.4.2.(1).)
  2. Sealants shall conform to
    1. ASTM C 834, "Latex Sealants,"
    2. ASTM C 920, "Elastomeric Joint Sealants,"
    3. ASTM C 1184, "Structural Silicone Sealants," or
    4. ASTM C 1311, "Solvent Release Sealants."
  3. Backer rod shall conform to ASTM C 1330, "Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants." (See Note A-9.27.4.2.(1).)

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