Catalogs >
SIKA INDUSTRY >
Sikaflex®-221

Sikaflex®-221
2Pages

Catalog excerpts

Product Data Sheet Version 3 (06 / 2010) Sikaflex®-221 One-component adhesive sealant Technical Product Data Chemical base 1 Colour (CQP 001-1) Cure mechanism Non-sag properties Application temperature Tack free time2 (CQP 019-1) Open time2 (CQP 526-1) Curing speed (CQP 049-1) Shrinkage (CQP 014-1) Shore A-hardness (CQP 023-1 / ISO 868) Tensile strength (CQP 036-1 / ISO 37) Elongation at break (CQP 036-1 / ISO 37) Tear propagation resistance (CQP 045-1/ ISO 34) Glass transition temperature (CQP 509 -1/ ISO 4663) Thermal resistance (CQP 513-1) Short term Service temperature Shelf life (storage below 25°C) (CQP 016-1 1) CQP = Corporate Quality Procedure Description Sikaflex®-221 is a high-quality multi-purpose non-sag 1-C polyurethane sealant that cures on exposure to atmospheric humidity to form a durable elastomer. For US: Meets ASTM C920 and Federal Specifications TT-S00230C. Sikaflex®-221 is manufactured in accordance with ISO 9001 / 14001, quality assurance system and with the responsible care program. Product Benefits - 1-C formulation - Elastic - Low odour - Resistant to ageing - Non-corrosive - Can be overpainted - Can be sanded - Bonds well to a wide variety of substrates - NSF-approved for incidental food contact. Areas of Application ® Sikaflex -221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics. Seek manufacturer’s advice before using on transparent and pigmented materials that are prone to stress cracking. This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility. 1-C polyurethane White, grey, black, brown Moisture-curing 1.3 kg/l approx. depending on colour Good 5 - 40°C (40 - 105°F) 60 min. approx. 45 min. approx. (see diagram) 5% approx. 40 approx. 1.8 MPa approx. 500% approx. 7 N/mm approx. -45°C (-50°F) approx. 90°C (195°F) 120°C (250°F) 140°C (285°F) -40 - 90°C (-40 - 195°F) 12 months

Open the catalog to page 1

Cure Mechanism Sikaflex®-221 cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram) 23°C / 50% r.h 8 10°C / 50% r.h 4 Diagram 1: Curing speed for Sikaflex®-221 Chemical Resistance ® Sikaflex -221 is resistant to fresh water, seawater, limewater, sewage effluent, diluted acids and caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, alcohol, concentrated mineral acids and caustic solutions or...

Open the catalog to page 2