This standard specifies the methods for testing one-part gun-grade polysulphide-based joint sealants. It details the procedures for assessing properties like extrusion rate, hardness, adhesion, cohesion, staining, and weight loss to ensure the sealant's performance and durability. This document (Part 2) is intended to be used in conjunction with IS 11433 (Part 1), which defines the specification and performance requirements.
Specification for one part gun-grade polysulphide-based joints sealants, Part 1: General requirements
Quick Reference Values
Standard Test Temperature27 ± 2 °C
Standard Test Relative Humidity50 ± 5 percent
Hardness Test Cure Period28 days
Adhesion/Cohesion Water Immersion Duration168 hours (7 days)
Staining Test Temperature70 ± 2 °C
Weight Loss Test Duration28 days at 70 °C
Practical Notes
This standard is a companion to IS 11433 (Part 1). Part 2 describes *how* to test, while Part 1 describes the *required results* for the sealant to pass.
Meticulous preparation and conditioning of test specimens, including substrates like mortar blocks, are crucial for achieving reliable and comparable test outcomes.
The adhesion-in-peel test (Clause 7) is a key performance indicator, simulating joint movement and environmental exposure to check for sealant failure.