Key components:

•       Base Component: Liquid polysulphide polymer with fillers and plasticizers
•       Curing Agent: Usually includes a catalyst (often manganese dioxide or lead dioxide) for vulcanization

 Key Properties

•       Excellent Flexibility: Remains elastic over a wide temperature range (-40°C to +80°C), making it ideal for dynamic joints that experience frequent expansion and contraction.
•       Outstanding Chemical Resistance: Resistant to fuels, oils, solvents, water, and many aggressive chemicals—making it suitable for chemical processing plants and fuel-handling areas.
•       Waterproofing Capability: Provides an impermeable barrier against water ingress, even under submerged conditions.
•       UV and Weather Resistance: Withstands prolonged exposure to sunlight, rain, and temperature extremes without cracking or degradation.
•       Adhesion: Strong adhesion to a variety of substrates such as concrete, metal, glass, and masonry—often enhanced with a primer.

 Applications

Polysulphide sealants are extensively used for expansion joints in:

• Infrastructure & Civil Construction

• • Bridges, flyovers, and tunnels
  • Dams, water treatment plants
  • Podiums, terraces, and facades
  • Basements and retaining walls

Industrial & Commercial

• Fuel stations and chemical storage facilities
• Airports and runways
• Precast concrete panel joints
• Floor joints in warehouses and parking decks

Marine and Water Containment

• Dockyards and harbors
• Swimming pools and water tanks

Advantages Over Other Sealants

• Long Service Life: Proven durability of over 20 years in many installations

• No Shrinkage or Cracking: Maintains integrity over time under continuous movement

• Custom Formulations: Available in gun-grade (non-sag) and pour-grade (self-leveling) types
•  Low Maintenance: Requires minimal upkeep once applied

Application Guidelines

• Joint Preparation: Clean and dry the joint. Remove dust, oil, grease, and any loosely bonded material.

• Primer Application: A suitable primer is recommended for improved adhesion.

•  Backer Rod Installation: Insert a closed-cell polyethylene backer rod to control sealant depth.

• Mixing (for two-part systems): Mix base and curing agent thoroughly as per manufacturer’s ratio.

•  Sealant Application: Apply with a suitable caulking gun (gun-grade) or pour directly into the joint (pour-grade).

• Tooling: Tool the surface to ensure good contact with joint walls and a smooth finish.

• Curing Time: Initial cure within 6–12 hours; full cure in 7 days, depending on humidity and temperature