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In stock
- Sikaflex® 221 - Grey, 10.3 oz tube
- Sikaflex® -221 bonds well to a wide variety of substrates
- Suitable for making permanent elastic seals of high adhesive strength
- Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics
A grey, high performance, polyurethane-based sealant, 10.3 oz that remains permanently elastic and is ideal for sealing materials and dissimilar coefficients of expansion. For use on aluminum, steel, wood, fiberglass and zinc-coated steel. General purpose, fast curing. This versatile polyurethane product is the most popular adhesive/sealant in the transportation industry. It is an excellent sealer and can handle many light bonding applications. Sikaflex® -221 is a high-quality multipurpose non-sag 1-c polyurethane sealant that cures on exposure to atmospheric humidity to form a durable elastomer. 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 Care Program.
Product Benefits
- 1-C formulation
- Elastic
- Low odor
- Resistant to weathering exposure
- Non-corrosive - Can be overpainted
- Can be sanded
- Lower VOC’s
- Bonds well to a wide variety of substrates
- NSF registered, Proprietary Substances and Nonfood Compounds
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 wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics. Before using on transparent and pigmented materials that are prone to stress cracking, contact the Technical Service Department of Sika Industry at tsmh@us.sika.com. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
Catalog Link | Click Here |
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PDS Sheet | Click Here |
Weight (lbs) | 0.950000 |
Pack Size | Each |
UOM | EA |
Brand | Sika |
Product Line | SikaFlex® |
Grease Fitting | No |
Chemical Base | 1-C polyurethane |
Density | 10.6 lbs/gallon approx. |
Application Temperature | 40 - 105°F (5 - 40°C ) |
Storage | 12 months, Cartridges & Unipacs. (storage below 77°F (25°C)) (CQP 016-1) |
Tensile Strength | 260 psi approx |
Cure mechanism | Moisture-curing |
Tack Free Time | 60 min. approx. |
Open Time | 45 min. approx. |