--- product_id: 304313725 title: "Sikaflex-221 - Black - Multi-purpose polyurethane sealant/adhesive - Creates permanent elastic seal - Sandable/paintable - Non-corrosive - 10.1 fl oz" brand: "sika" price: "£17.03" currency: GBP in_stock: true category: "Sika" url: https://www.desertcart.co.uk/products/304313725-sikaflex-221-black-multi-purpose-polyurethane-sealant-adhesive-creates-permanent store_origin: GB region: United Kingdom --- # waterproof & weather resistant bonds metals, plastics & ceramics 3 hr full cure time Sikaflex-221 - Black - Multi-purpose polyurethane sealant/adhesive - Creates permanent elastic seal - Sandable/paintable - Non-corrosive - 10.1 fl oz **Brand:** sika **Price:** £17.03 **Availability:** ✅ In Stock ## Summary > 🔗 Seal it, stick it, trust it — the ultimate bond for pros who settle for nothing less! ## Quick Answers - **What is this?** Sikaflex-221 - Black - Multi-purpose polyurethane sealant/adhesive - Creates permanent elastic seal - Sandable/paintable - Non-corrosive - 10.1 fl oz by sika - **How much does it cost?** £17.03 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/304313725-sikaflex-221-black-multi-purpose-polyurethane-sealant-adhesive-creates-permanent) ## Best For - sika enthusiasts ## Why This Product - Trusted sika brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Elastic Seal:** Creates a permanent, flexible seal that withstands vibration, seawater, acids, and harsh weather. - • **Fast & Reliable Cure:** Achieves initial hardening in 1 hour and full cure in just 3 hours—get back to work faster. - • **Versatile Bonding Power:** Adheres seamlessly to metals, plastics, ceramics, and coated surfaces for all your project needs. - • **User-Friendly Application:** Ready-to-use cartridge fits all standard guns for precise, mess-controlled application every time. - • **Safe for Sensitive Environments:** NSF-approved for drinking water and food production—performance without compromise. ## Overview Sikaflex-221 is a premium black polyurethane sealant and adhesive designed for multi-surface bonding and permanent elastic sealing. It cures quickly upon exposure to moisture, forming a durable, waterproof, and vibration-resistant elastomer. NSF-approved and resistant to aging, seawater, and chemicals, it’s ideal for professional-grade automotive, construction, and industrial applications. ## Description Sikaflex-221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive that cures on exposure to atmospheric humidity to form a durable elastomer. 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. ## Features - VERSATILITY AND QUALITY IN ONE - Sometimes simply called Sika 221 black, this one-component urethane caulk bonds to a range of substrates, including metals, plastics, and metal primers and coatings - AGE RESISTANT - Formulated to resist the effects of aging to better perform at peak capacity no matter the conditions. Also resists elements such as seawater, diluted acids, and caustic solutions - READY TO USE - The Sikaflex black sealant comes in a handy cartridge that fits easily on an electric, pneumatic or manual application gun, making accurate placement of adhesive paste quick and easy - SAFE AND EFFECTIVE - Approved by the NSF for use in both drinking water systems and food production operations, so you can rest easy knowing there's no harmful level of chemicals - PERFECT FOR INTERNAL SEALS AND BONDING - Use it for permanent seals that you can rely on. The paste also bonds to ceramic materials and cures quickly upon exposure to atmospheric moisture ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00NW5LWHA | | Best Sellers Rank | #4,226 in Automotive ( See Top 100 in Automotive ) #26 in Automotive Fillers, Adhesives & Sealants | | Brand Name | SIKA | | Color | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (2,827) | | EU Spare Part Availability Duration | 5 Years | | Full Cure Time | 3 Hours | | Included Components | AP Products 017-90893 Sikaflex-221, Black | | Initial Hardening Time | 1 Hours | | Item Form | Paste | | Item Type Name | AP Products 017-90893 Sikaflex-221, Black | | Item Weight | 10.1 Ounces | | Liquid Volume | 10.1 Fluid Ounces | | Manufacturer | SIKA | | Material Type | Polyurethane | | Model | 017-90893 | | Number of Items | 1 | | Part Number | 017-90893 | | Surface Recommendation | Versatile, suitable for various surfaces | | Unit Count | 10.1 Fluid Ounces | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** SIKA - **Colour:** Black - **Full cure time:** 3 Hours - **Item weight:** 10.1 Ounces - **Liquid volume:** 10.1 Fluid Ounces ## Images ![Sikaflex-221 - Black - Multi-purpose polyurethane sealant/adhesive - Creates permanent elastic seal - Sandable/paintable - Non-corrosive - 10.1 fl oz - Image 1](https://m.media-amazon.com/images/I/6177TD7R3eL.jpg) ## Available Options This product comes in different **Color, Style** options. ## Frequently Bought Together - Sika Sikaflex-221 - Black - Multi-Purpose Polyurethane sealant/Adhesive - Creates Permanent Elastic Seal - Sandable/paintable - Non-Corrosive - 10.1 fl oz - Dicor 551LSB-1 HAPS-Free NON-Leveling Lap Sealant - 10.3 Oz, Black, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application - Dicor BT-1834-1 Butyl Seal Tape - 1/8" x 3/4" x 30' Repair Tape for RV, Trailer, Motorhome, Window, and Vent Sealing --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/304313725-sikaflex-221-black-multi-purpose-polyurethane-sealant-adhesive-creates-permanent](https://www.desertcart.co.uk/products/304313725-sikaflex-221-black-multi-purpose-polyurethane-sealant-adhesive-creates-permanent) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-29*