Description
Sikaflex®-221
Sikaflex®-221 is a high-performance, one-component polyurethane adhesive and sealant engineered for permanent elastic sealing and flexible bonding applications across automotive, transportation, marine, HVAC, OEM manufacturing, and industrial assembly sectors.
Developed with moisture-curing polyurethane technology, Sikaflex®-221 provides excellent adhesion to a wide variety of substrates including metals, metal primers, painted surfaces, ceramics, plastics, and composite materials. The cured elastomeric seal accommodates vibration, thermal expansion, and dynamic mechanical stress while maintaining long-term adhesion integrity and sealing performance.
Its non-sag rheology ensures controlled application on vertical and horizontal surfaces, making it suitable for internal sealing, industrial assembly, panel bonding, sheet metal fabrication, transportation body construction, and general-purpose flexible bonding applications. Sikaflex®-221 also offers excellent ageing resistance, low odor formulation, and paintable surfaces for professional finishing requirements.
Designed for demanding industrial operating conditions, Sikaflex®-221 demonstrates strong resistance against vibration, humidity, weather exposure, and temperature fluctuations commonly experienced across UAE and GCC environments. The product is widely used in commercial vehicle assembly, transportation manufacturing, marine sealing systems, HVAC fabrication, and industrial maintenance operations.
Key Features
- One-component polyurethane adhesive and sealant
- Permanent elastic sealing performance
- Excellent adhesion to multiple substrates
- Non-sag application properties
- Resistant to ageing and weather exposure
- Paintable and sandable after curing
- Low-odor and non-corrosive formulation
- Suitable for industrial sealing and bonding applications
- Good vibration and thermal cycling resistance
- Moisture-curing technology for durable bonding performance
Typical Applications
- Automotive body sealing and bonding
- Transportation and commercial vehicle assembly
- HVAC duct and panel sealing
- Marine and offshore sealing applications
- Industrial equipment assembly
- OEM manufacturing and fabrication
- Sheet metal bonding and sealing
- Internal and external flexible sealing applications
Typical Technical Data
- Chemical Base: 1-component polyurethane
- Cure Mechanism: Moisture-curing
- Skin Time: approx. 60 minutes
- Open Time: approx. 45 minutes
- Tensile Strength: approx. 1.8 MPa
- Elongation at Break: approx. 500%
- Shore A Hardness: approx. 40
- Service Temperature: -50°C to +90°C
- Application Temperature: 5°C to 40°C
- Available Colors: White, Grey, Black
Substrate Compatibility
Sikaflex®-221 bonds well to:
- Metals and coated metals
- Painted substrates
- Ceramic materials
- Plastics and composite materials
- Industrial panels and fabricated assemblies
Packaging Options
- 300 ml Cartridge
- 600 ml Unipack/Sausage
As an official distributor, White House General Trading LLC supplies Sikaflex® adhesive and sealing solutions across UAE, GCC, Middle East & Africa, supporting automotive, marine, transportation, HVAC, and industrial sectors with technical product selection, application guidance, and reliable supply solutions.
FAQ Section
What is Sikaflex®-221 used for?
Sikaflex®-221 is used for flexible bonding and permanent elastic sealing applications in automotive, marine, transportation, HVAC, and industrial manufacturing sectors.
Is Sikaflex®-221 paintable?
Yes, Sikaflex®-221 can be painted after curing depending on the paint system compatibility.
Can Sikaflex®-221 bond metal surfaces?
Yes, Sikaflex®-221 provides excellent adhesion to metals, painted substrates, ceramics, plastics, and composite materials.
Is Sikaflex®-221 suitable for automotive applications?
Yes, Sikaflex®-221 is widely used for automotive sealing and bonding applications due to its flexibility and environmental resistance.
Is Sikaflex®-221 suitable for UAE climate conditions?
Yes, Sikaflex®-221 offers excellent resistance against vibration, humidity, thermal cycling, and harsh environmental conditions commonly experienced across UAE and GCC regions.
