Code Library › Volume 1 › Section 9.27 — Cladding
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.27.4.2.Materials

(1) Sealants shall be (a) non-hardening type suitable for exterior use, (b) selected for their ability to resist the effects of weathering, and (c) 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 (a) ASTM C834, “Standard Specification for Latex Sealants,” (b) ASTM C920, “Standard Specification for Elastomeric Joint Sealants,” (c) ASTM C1184, “Standard Specification for Structural Silicone Sealants,” or (d) ASTM C1311, “Standard Specification for Solvent Release Sealants.” (3) Backer rod shall conform to ASTM C1330, “Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants.” (See Note A-9.27.4.2.(1))
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.