- Product description
- Technical details
Multifunctional adhesive and sealant with a broad adhesion spectrum
Sikaflex®-221 is a versatile one-component polyurethane adhesive and sealant for a wide range of substrates such as metals, primers and paints (two-component systems), ceramic materials and plastics. Sikaflex®-221 is suitable for the production of permanently elastic joints.
- Good adhesion to a wide range of substrates
- Resistant to ageing
- Can be sanded and painted over
Product advantages
- Good adhesion to a wide range of substrates
- Resistant to ageing
- Can be sanded and painted over
- Tested according to EN45545-2 R1/R7 HL3
- Non-corrosive
- Low odour
Application
Sikaflex®-221 adheres well to a variety of substrates and is suitable for elastic, durable sealing. Suitable substrates are metals, primers and paints (two-component systems), ceramic materials and plastics. Follow the manufacturer's recommendations before using Sikaflex®-221 on materials at risk of stress cracking. Preliminary tests must be carried out with original materials to avoid stress cracking. This product is only suitable for experienced users. To ensure adhesion and material compatibility, preliminary tests must be carried out with original materials under the respective conditions.
Chemical Basis:Silane-terminated polymer (STP)
Colour (CQP001-1): off-white
Curing mechanism:Moisture curing
Density before curing: 1.3kg/l
Stability: good
Processing temperature: 5 to 40°C
Skin forming time (CQP019-1): 60 minutes (23°C)
Volume change (CQP014-1): -5%
Shore A hardness (CQP023-1 / ISO 7619-1): 40
Tensile strength (CQP036-1 / ISO 527): 1.8 MPa
Elongation at break (CQP036-1 / ISO 527):500%
Tear resistance (CQP045-1 / ISO 34): 7 N/mm
Shelf life (CQP016-1): 12 months when stored below 25°C