Sikaflex® 221 300ml - white

Multifunctional adhesive and sealant with a broad adhesion spectrum

Sikaflex®-221 is a versatile one-component polyurethane adhesive and sealant for a variety of substrates such as metals, primers and paints (two-component systems), ceramic materials and plastics. Sikaflex®-221 is suitable for creating 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.

Technical data

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 formation 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

Safety Data Sheet Sikaflex-221 German