IS 11433:2000 (Part 1) is the Indian Standard (BIS) for one part gun-grade polysulphide-based joints sealants, part 1: general requirements. 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
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Movement Capability | ± 25% (MAF) | ± 25% (For Class 25) | ASTM C920 |
| Slump (Non-Sag Type) | Max 3 mm | Max 4 mm (for Grade NS) | ASTM C920 |
| Hardness (Shore A, 28-day cure) | 15 to 30 | Manufacturer reported; typically 15-30 for a Class 25 sealant. | ASTM C920 |
| Tack-Free Time | Max 72 hours | Manufacturer reported per ASTM C679; no value mandated by the spec itself. | ASTM C920 |
| Adhesion-in-Peel Strength (after water immersion) | Min 5.0 N | Min 22 N/25mm or 5 lbf/in (as per ASTM C794, often specified alongside C920) | ASTM C920 / C794 |
| Cyclic Adhesion & Cohesion Test (at ±25%) | No cracking or loss of adhesion after 10 cycles | No adhesive or cohesive failure after 10 cycles (per ASTM C719 for Class 25) | ASTM C920 |
| Weight Loss after Heat Ageing | Max 10% | Max 10% (for Type S and M) | ASTM C920 |