--- product_id: 187187320 title: "Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml" brand: "sika" price: "$38.48" currency: USD in_stock: true reviews_count: 10 category: "Sika" url: https://www.desertcart.us/products/187187320-sika-sikaflex-221-strong-adhesive-sealant-grey-300ml store_origin: US region: United States of America --- # 45 min open time water resistant & flexible high adhesive strength Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml **Brand:** sika **Price:** $38.48 **Availability:** ✅ In Stock ## Summary > 🔧 Seal it like a pro, stick with the best! ## Quick Answers - **What is this?** Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml by sika - **How much does it cost?** $38.48 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/187187320-sika-sikaflex-221-strong-adhesive-sealant-grey-300ml) ## 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 - • **Finish-Ready:** Sandable and paintable for seamless integration with your project’s aesthetic. - • **Flexible Durability:** Cures into a permanently elastic seal that resists cracking and sagging under stress. - • **Pro-Level Work Time:** Stay in control with a 45-minute open window for precise application. - • **Food-Safe Confidence:** NSF-approved for incidental food contact—safe for kitchen and food-related fixes. - • **Unmatched Bonding Power:** Experience professional-grade adhesion that sticks to metal, plastic, ceramics, and more. ## Overview Sika Sikaflex 221 is a professional-grade, multi-purpose polyurethane adhesive sealant offering a 45-minute open time and strong, flexible bonding on diverse surfaces including metal and plastic. It cures into a durable, elastic, water-resistant seal that can be sanded and painted, making it ideal for automotive, marine, and general repair projects. NSF-approved for incidental food contact, this 300ml grey cartridge delivers reliable, long-lasting performance trusted by experts. ## Description Shop Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml | Multi-Purpose Application – Sandable/Paintable. Free delivery on eligible orders of £20 or more. Review: Extremely Strong Adhesion, Professional Quality - This is not comparable to standard DIY sealants you might find in typical hardware stores. I’ve used Sikaflex 221 several times over the past year for various automotive and general fixing jobs, and the performance is far superior to basic alternatives. The adhesive strength is excellent. Once applied, it bonds very firmly and creates a durable, flexible seal. It works well on multiple surfaces including metal and plastic, making it ideal for vehicle modifications and exterior applications. It’s especially useful where a strong, permanent bond is required. After curing, it remains slightly flexible, which helps prevent cracking due to vibration or movement. One important thing to be aware of is how sticky it is. If it gets on your hands, tools, or unintended surfaces, it can be difficult to remove. Careful application and preparation are essential. Pros: • Extremely strong adhesion • Professional-grade quality • Works on multiple surfaces • Flexible once cured • Ideal for automotive and outdoor use Cons: • Difficult to remove if applied accidentally • Requires careful handling during application Overall: A high-quality adhesive and sealant that provides excellent strength and durability. Ideal for automotive, DIY, and permanent bonding applications where reliability is important. Review: Professional grade product at reasonable prices - Sika products are seriously good products, expensive but worth every penny. I used this to bond 12mm marine ply to line the tops of the doors on my van , use disposable gloves because it will tack and stick to pretty much everything…. Its leak prevention is excellent, easy to use and very effective. Be warned though it sticks to everything so be careful you don’t get it on anything you don’t want it on because it’s almost impossible to remove easily. Sika make a lot of very specific products so do a little research first to find the exact product for your particular task …… you will be surprised at what they actually provide. This is professional grade products, very strong and can be used as a sealer as well as an adhesive. I found that if you wrap up the tube after use and seal it I can actually get a few days use out of the tube before it finally hardens.. ## Features - Contains isocyanates. May produce an allergic reaction. - May cause allergy or asthma symptoms or breathing difficulties if inhaled. - May cause damage to organs through prolonged or repeated exposure. - PROFESSIONAL USE PRODUCT – This product is suitable for experienced professional users only. - LONG-OPEN TIME – Sikaflex 221 remains workable for up to 45 minutes once open and will develop a skin in 60 minutes, providing temperatures are between 5˚C and 40˚C. - VERSATILE – A multi-purpose sealant and adhesive with high adhesive strength. Bonds well to a wide variety of substrates, including metals, ceramics, plastics and painted materials. - PERMANENTLY ELASTIC – Cures using ambient moisture into an elastic but permanent seal that does not sag and can be sanded and painted as needed. - FOOD SAFE – NSF-Approved for incidental food contact. - AVAILABLE IN MULTIPLE COLOURS – Available in Black, White, Brown and Light Grey. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07GBYFL5Y | | Best Sellers Rank | 1,841 in DIY & Tools ( See Top 100 in DIY & Tools ) 41 in Sealers | | Brand | Sika | | Colour | Grey | | Compatible Material | Metal, Porcelain | | Country Of Origin | Switzerland | | Customer Reviews | 4.6 out of 5 stars 694 Reviews | | Included Components | 1x Cartridge | | Item Dimensions | 50 x 50 x 230 millimetres | | Item Form | Paste | | Item Highlight | Multi-Purpose Application – Sandable/Paintable | | Item Type Name | Sealant and Adhesive | | Item Weight | 0.45 Grams | | Item dimensions L x W x H | 50 x 50 x 230 millimetres | | Item weight | 0.45 Grams | | Manufacturer | Sika Everbuild | | Manufacturer Part Number | SKFLEX221GY | | Material | Polyurethane | | Model Number | 221 | | Number of Items | 1 | | Number of Packs | 1 | | Style | Compact | | Style Name | Compact | | Surface Recommendation | Window | | Unit Count | 300.0 millilitre | | Water Resistance Level | Water Resistant | | Water resistance level | Water Resistant | ## Product Details - **Brand:** Sika - **Item dimensions L x W x H:** 50 x 50 x 230 millimetres - **Item weight:** 0.45 Grams - **Material:** Polyurethane - **Style:** Compact ## Images ![Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml - Image 1](https://m.media-amazon.com/images/I/61SFNQD1hfL.jpg) ![Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml - Image 2](https://m.media-amazon.com/images/I/81b2EKbaTxL.jpg) ![Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml - Image 3](https://m.media-amazon.com/images/I/81nhp0FUYDL.jpg) ![Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml - Image 4](https://m.media-amazon.com/images/I/81e2Vzx2JcL.jpg) ![Sika Sikaflex 221 Strong Adhesive Sealant, Grey, 300ml - Image 5](https://m.media-amazon.com/images/I/81cuXQQf8DL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Extremely Strong Adhesion, Professional Quality *by C***L on 16 February 2026* This is not comparable to standard DIY sealants you might find in typical hardware stores. I’ve used Sikaflex 221 several times over the past year for various automotive and general fixing jobs, and the performance is far superior to basic alternatives. The adhesive strength is excellent. Once applied, it bonds very firmly and creates a durable, flexible seal. It works well on multiple surfaces including metal and plastic, making it ideal for vehicle modifications and exterior applications. It’s especially useful where a strong, permanent bond is required. After curing, it remains slightly flexible, which helps prevent cracking due to vibration or movement. One important thing to be aware of is how sticky it is. If it gets on your hands, tools, or unintended surfaces, it can be difficult to remove. Careful application and preparation are essential. Pros: • Extremely strong adhesion • Professional-grade quality • Works on multiple surfaces • Flexible once cured • Ideal for automotive and outdoor use Cons: • Difficult to remove if applied accidentally • Requires careful handling during application Overall: A high-quality adhesive and sealant that provides excellent strength and durability. Ideal for automotive, DIY, and permanent bonding applications where reliability is important. ### ⭐⭐⭐⭐⭐ Professional grade product at reasonable prices *by B***R on 6 February 2026* Sika products are seriously good products, expensive but worth every penny. I used this to bond 12mm marine ply to line the tops of the doors on my van , use disposable gloves because it will tack and stick to pretty much everything…. Its leak prevention is excellent, easy to use and very effective. Be warned though it sticks to everything so be careful you don’t get it on anything you don’t want it on because it’s almost impossible to remove easily. Sika make a lot of very specific products so do a little research first to find the exact product for your particular task …… you will be surprised at what they actually provide. This is professional grade products, very strong and can be used as a sealer as well as an adhesive. I found that if you wrap up the tube after use and seal it I can actually get a few days use out of the tube before it finally hardens.. ### ⭐⭐⭐⭐⭐ Great product. *by T***S on 17 August 2026* Great product. ## Frequently Bought Together - Sika Sikaflex 221 Adhesive Sealant, Grey, 300 ml - Sika Flex 522 Caravan Steel Grey 300 ml STP Universal Adhesive, Sealant, UV --- ## 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.us/products/187187320-sika-sikaflex-221-strong-adhesive-sealant-grey-300ml](https://www.desertcart.us/products/187187320-sika-sikaflex-221-strong-adhesive-sealant-grey-300ml) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-27*