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 and sanded
- Lower VOC’s
- Bonds well to a wide variety of substrates
- NSF registered, Proprietary Substances and Nonfood Compounds (black, gray, and white)
- UL listed for potable water (black, gray, and white)
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.
- Weight:
- 1.7000 LBS
- PDS:
- Click Here
- Color:
- White
- Show Options Price Differential:
- Female
- Pack Size:
- Each
- UOM:
- EA
- Product Line:
- SikaFlex®
- Lock-In / Lock-Out:
- No
- Grease Fitting:
- No
- Chemical Base:
- 1-C polyurethane
- Density:
- 10.6 lbs/gallon approx.
- Application Temperature:
- 40 - 105°F (5 - 40°C )
- Shelf Life:
- 12 months, Cartridges & Unipacs. (storage below 77°F (25°C))
- Tensile Strength:
- 260 psi approx
- Cure mechanism:
- Moisture Curing
