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 approvals ASTM C920 types and Federal Specifications TT-S- 00230C. Sikaflex®-221 is tested and classified in accordance with ANSI/UL 723 "Test for Surface Burning Characteristics of Building Materials". Sikaflex®-221 is manufactured in accordance with ISO 9001 / 14001 quality assurance ?system and the Responsible CareProgram.
Product Benefits
1-C formulation Elastic Low odor Resistant to aging and weathering exposure Non-corrosive Can be overpainted Can be sanded Bonds well to a wide variety of substrates
| Model | 221-241 |
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| Size | 300 ml Cartridge |
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| Qty Per Case | 24 per case |
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| Part Number | 90892 |
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| Application Temperature Approximate Product | 41°F - 104°F (5°C - 40° C) |
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| Chemical Base | 1-C polyurethane |
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| Color | Black |
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| Cure Mechanism | Humidity-curing |
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| Curing Speed | (see diagram 1) |
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| Density (uncured) | 10.6 lb/gal depending on color |
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| Elongation At Break (astm D 412) | 500% |
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| Glass Transition Temperature | -49°F (-45°C) |
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| Movement Accommodation Factor | 12.50% |
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| Non-sag Properties | Good |
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| Open Time | 45 min (73°F (23°C) / 50% r.h.) |
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| Unit of Measure | EA |
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| Service Temperature Permanent | -40° - 194°F (-40°-+90°C) |
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| Manufacturer | Sika |
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| Service Temperature 1 Hour | 284°F (140°C) |
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| Service Temperature 1 Day | 248°F (120°C) |
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| Shelf Life (storage Below 77°f (25°c)) | 12 months |
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| Shore A-hardness (astm D 2240) | 40 |
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| Shrinkage | 5% |
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| Tear Propagation Resistance (astm D 624) | 34 pli |
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| Tensile Strength (astm D 412) | 260 psi |
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| VOC (epa Method 24) | 0.4 lb/gal (48.3 g/l) |
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