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Sikaflex® 221 - White, 13 oz. uni-pack
Part Number:
  • 221-400ML WHITE

In stock

- Sikaflex® 221 - White polyurethane sealant
- 13 oz. sausage uni-pack
- Highly elastic and durable
- Resistant to aging and weathering exsposure
- Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics.


Sikaflex® -221 White 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 [email protected] 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
PDS Sheet Click Here
Weight (lbs) 1.1420
Brand Sika®
Color White
Product Line SikaFlex®
Application Temperature 40 - 105°F (5 - 40°C )
Chemical Base 1-C polyurethane
Cure mechanism Moisture-curing
Density 10.6 lbs/gallon approx.
Open Time 45 min. approx
Storage 12 months, Cartridges & Unipacs. (storage below 77°F (25°C))
Tack Free Time 60 min. approx
Tensile Strength 260 psi approx


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