Similar International Standards
ASTM C920-18ASTM International, USA
HighCurrent
Standard Specification for Elastomeric Joint Sealants
Specifies requirements for single and multi-component elastomeric sealants, including polyurethane, for sealing building joints.
ISO 11600:2002International Organization for Standardization (ISO), Switzerland
HighCurrent
Building construction — Jointing products — Classification and requirements for sealants
Provides a globally recognized classification system for construction sealants based on movement and application, which is a core concept in IS 17466.
BS EN 15651-1:2017British Standards Institution (BSI) / European Committee for Standardization (CEN), UK/Europe
HighCurrent
Sealants for non-structural use in joints in buildings and pedestrian walkways - Part 1: Sealants for facade elements
Defines requirements for facade sealants, a primary use for PU sealants, and is required for CE marking in Europe.
JIS A 5758:2016Japanese Industrial Standards (JIS), Japan
MediumCurrent
Sealing compounds for sealing and glazing in buildings
Covers various sealing compounds, including polyurethane, for building applications but uses a different classification structure.
Key Differences
≠IS 17466 is material-specific, covering only polyurethane-based sealants. In contrast, ASTM C920 and ISO 11600 are performance-based specifications that cover various elastomeric chemistries (polyurethane, silicone, polysulfide, etc.) under a single standard.
≠The artificial weathering test protocol differs significantly. IS 17466 specifies 1000 hours of Xenon-arc exposure (ISO 11341), whereas ASTM C920 specifies a shorter 250-hour cycle of UV light and condensation (ASTM C793) before subsequent adhesion testing.
≠Classification nomenclature is different. IS 17466 uses simple MAF classes (e.g., Class 25). ISO 11600 uses a more descriptive code (e.g., F-25LM for Facade, 25% movement, Low Modulus). ASTM C920 uses Class (e.g., 25) and Grade (e.g., NS for Non-Sag).
≠IS 17466 includes a specific test for staining on porous substrates (marble), which is a mandatory requirement. While ASTM C920 has a staining test method (ASTM C510), its inclusion and pass/fail criteria can be optional or project-specific.
Key Similarities
≈All standards use the Movement Accommodation Factor (MAF) or Movement Capability as a primary basis for classifying sealants, with common classes like ±12.5% and ±25%.
≈The fundamental performance test involves a cyclic adhesion and cohesion test, where sealant beads between substrates are subjected to repeated extension and compression to simulate joint movement.
≈Key physical properties such as Hardness (Shore A), Elastic Recovery, and Flow/Slump are specified and tested in a similar manner across all standards to define sealant behavior.
≈All standards recognize and provide requirements for both one-component (moisture-cure) and two-component (chemically-curing) sealant types.
≈Standard test conditions (e.g., 23 ± 2 °C and 50 ± 5 % RH) for specimen conditioning and testing are very similar, ensuring a consistent basis for evaluation.