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Home > Products > Sealants > Sikaflex 221

Sikaflex 221

Download TDS     | Application Tips     | Video

Multipurpose PU sealant for long term durability

Sika 221, a polyurathane sealant, for bonding and sealing applications in bus, railways, trucks, and weld joint sealing applications.
Applications
  • Sealing in bus body, railways, trucks, refrigeration equipments
  • As seam sealant in machine tools and construction equipment
  • Bonding and selaing in GRP fabricated structures and many more
Replaces
Available pack size300ml, 600ml, 23Litre
StandardsNSF approved,ASTM C920, TT-S-00230C/REACH/RoHS
Related Accessories
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Specifications

Chemical CompositionPolyurethane
Curing MechanismMoisture
ColorWhite/Grey/Black/Brown
Specific GravityN/A
Recommended substratesMetals, Plastics, Composites, Ceramic.
Max gap fill6mm
Tack Free Time60min
Elongation at Break500% approx.
Hardness40 Shore A
Tensile Strength1.8MPa
Service Temperature-40°C to 90°C

Features and Benefits

Very elastic and strong
NSF approved for incidental food contact
Bonds well to a variety of applications

Notes

  • Exhibits superior performance in transformer oil application
  • Curing speed can vary depending on moisture and humidity presence
  • Sealant inside an enclosed chamber can have delayed curing. Humidity chamber can be used to speedup.

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