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Table 1. General Requirements
Property Requirement
Shelf life The sealant in the original container shall be suitable for use for at least 12 months from the date of manufacture when stored at a temperature not less than 5°C (41.0°F) and not more than 27°C (80.6°F).
Colour The colour of the sealant shall be as agreed upon between the purchaser and the manufacturer.
Surface preparation The sealant shall be intended for use only on clean, dry surfaces. When a primer is recommended by a manufacturer for a specific substrate, all tests on that substrate shall include the primer. The proper use of primers (or surface conditioners) with the application of sealants is described in detail in ASTM C 1193, which also describes proper methods for joint design, backup materials, surface preparation, tooling of sealant, and other important procedures in sealant application in buildings.
Table 2. Physical Requirements
Property Unit Requirement
Extrudability s/mL ≤ 9
Indentation hardness - ≤ 50
Bubbling % ≤ 25
Adhesive and cohesive loss cm 2 (in. 2) ≤ 9 (1.5) per substrate
Slump cm (in.) ≤ 0.38 (0.15) per substrate
Stain index - ≤ 3
Tack-free time h ≤ 72
Accelerated Weathering
Edge cracking - ≤ 3
Centre cracking - ≤ 3
Adhesion loss - ≤ 3
Colour change - As agreed