IS 12118 (PART 1) : 1987
TWO PART POLYSULPHIDE BASED SEALANTS
summary
Two part polysulphide based sealants are elastomeric sealing compounds supplied in two components—base and curing agent—that chemically react when mixed. They provide excellent adhesion, flexibility, and resistance to chemicals, weathering, fuel, and water. These sealants are widely used in construction joints, glazing, water-retaining structures, and industrial applications.
Why BIS Certificate is Mandatory for TWO PART POLYSULPHIDE BASED SEALANTS
BIS certification is mandatory to ensure two part polysulphide based sealants meet prescribed quality, safety, and performance standards. Since they are used in critical sealing applications such as buildings, water tanks, and infrastructure joints, certification ensures durability, chemical resistance, adhesion strength, and long-term reliability under Indian environmental conditions.
What is BIS Certified for TWO PART POLYSULPHIDE BASED SEALANTS
The BIS certified specification defines requirements for composition, workability, curing time, adhesion, tensile strength, elasticity, and resistance to water, chemicals, and weathering. It also includes testing methods, packaging, and labeling requirements to ensure consistent product quality and performance in construction and industrial sealing applications.
Test required for TWO PART POLYSULPHIDE BASED SEALANTS
| Title | Mandatory/Optional |
|---|---|
| Rheological properties | Required |
| Plastic deformation | Required |
| Before ageing test | Required |
| After water immersion test | Required |
| After heat ageing test | Required |
| After cycles of extension at -15 °C and compression at 27 °C test | Optional |
| After sunlamp exposure through glass test | Optional |
| Application life | Required |
| Adhesion in peel | Required |
| Loss of mass after heat ageing | Required |
| Staining | Required |
Benefits of BIS Certification for TWO PART POLYSULPHIDE BASED SEALANTS
1. Assured Product Quality
BIS certification ensures the sealant meets defined standards for composition, curing, flexibility, and adhesion, reducing risks of premature joint failure and leakage.
2. Long-Term Durability
Certified sealants are tested for resistance to weathering, chemicals, moisture, and temperature variations, ensuring reliable performance in harsh environmental conditions.
3. Safety and Structural Protection
BIS-approved products help maintain watertight and airtight seals, protecting buildings and structures from water ingress, corrosion, and damage.
4. Regulatory and Market Compliance
Mandatory BIS certification allows manufacturers and importers to legally sell the product in India and participate in government and infrastructure projects.
5. Enhanced Brand Trust
The BIS mark increases credibility among builders, contractors, and project consultants, improving product acceptance and strengthening competitive advantage.