--- product_id: 20033231 title: "017-90892 Sikaflex-221, Aluminum Gray" brand: "ap products" price: "€ 28.73" currency: EUR in_stock: true reviews_count: 8 category: "Ap Products" url: https://www.desertcart.pt/products/20033231-017-90892-sikaflex-221-aluminum-gray store_origin: PT region: Portugal --- # Permanent elastic adhesion Fast curing in minutes Weather & moisture resistant 017-90892 Sikaflex-221, Aluminum Gray **Brand:** ap products **Price:** € 28.73 **Availability:** ✅ In Stock ## Summary > 🔧 Seal it once, seal it right — the pro’s choice for lasting strength! ## Quick Answers - **What is this?** 017-90892 Sikaflex-221, Aluminum Gray by ap products - **How much does it cost?** € 28.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/20033231-017-90892-sikaflex-221-aluminum-gray) ## Best For - ap products enthusiasts ## Why This Product - Trusted ap products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Finish Like a Pro:** Sandable and paintable for seamless, flawless repairs and upgrades. - • **Weatherproof Warrior:** Built to withstand rain, sun, and road abuse without losing grip. - • **Rapid Cure, Ready to Roll:** Get durable, long-lasting seals in record time with fast curing technology. - • **Certified Safe & Versatile:** NSF approved for potable water and incidental food contact—trusted for critical applications. - • **Unmatched Elastic Strength:** Maintains flexibility and adhesion even under constant vibration and shock. ## Overview Sikaflex-221 Aluminum Gray is a top-tier one-component polyurethane sealant and adhesive known worldwide for its fast curing, permanent elastic bonding, and exceptional resistance to weather, moisture, and mechanical stress. Ideal for aluminum surfaces in trucks, RVs, and buses, it offers professional-grade durability, is sandable and paintable, and meets NSF standards for potable water safety. ## Description Sikaflex is the most well known brand of one component polyurethane sealant/adhesive in the world. This fast curing product provides permanent elastic adhesion to a number of surfaces with excellent cut and tear resistance. Considered by many to be the ultimate choice in truck, trailer RV, and bus manufacturing. Designed to resist the shock and abuse encountered over countless road miles, Silaflex-221 will maintain its strength and adhesion over the long haul. Sikaflex-221 is weather resistant, sandable, paintable and NSF approved for potable water and incidental food contact. 10 oz. tube. Aluminum. Review: Best Sealant on the Market! - I believe this is the best sealant on the market. Sikaflex is used by Airstream in their factory for sealing them. I used it to better seal my windows on my airstream. The color matched perfectly and the flexibility really is good for sealing aluminum that is pieced together by rivets. The application was very easy and so was the cleanup. The finished product seems lasting and the sealant dries fasty for quick results. If you have an Airstream or any RV, I would recommend this product. It comes in various colors to meet your needs. Satisfied Customer! Review: Good stuff - As others have noted, these polyurethane adhesives are just awful to work with… sticky, gooey, and get on everything if you’re not careful. But that’s kinda the point. Tape everything off and go at it (and then after pulling the tape and admiring the clean lines, decide you want to do a few minor touch ups and make a huge embarrassing mess) I might come back and add pics if my off-label use case on a PVC dinghy works… and if I can clean it up a bit today.. ## Features - Sikaflex is the most well known brand of one component polyurethane sealant/adhesive in the world - This fast curing product provides permanent elastic adhesion to a number of surfaces with excellent cut and tear resistance - Designed to resist the shock and abuse encountered over countless road miles, Silaflex-221 will maintain its strength and adhesion over the long haul - Sikaflex-221 is weather resistant, sandable, paintable and NSF approved for potable water and incidental food contact ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004RCX8XS | | Best Sellers Rank | #21,720 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Polyurethane Adhesives | | Brand | AP Products | | Brand Name | AP Products | | Color | Aluminum Gray | | Compatible Material | Aluminum | | Container Type | Tube | | Customer Reviews | 4.5 out of 5 stars 305 Reviews | | EU Spare Part Availability Duration | 5 years | | Included Components | Auto part, Automotive Accessories, Replacement and Performance parts | | Item Form | Product | | Item Package Quantity | 1 | | Item Type Name | Sikaflex 221 Alum Gray 30 | | Item Weight | 15.2 ounces | | Manufacturer | AP Products | | Material | Polyurethane-based adhesive | | Material Type | Polyurethane-based adhesive | | Model | 1790892 | | Other Special Features of the Product | Extra-strong bonding capabilities, Heat Resistant, Moisture Resistant, Durable, Sandable, Paintable, NSF Approved for Food Contact | | Part Number | 017-90892 | | Special Feature | Extra-strong bonding capabilities, Heat Resistant, Moisture Resistant, Durable, Sandable, Paintable, NSF Approved for Food Contact Special Feature Extra-strong bonding capabilities, Heat Resistant, Moisture Resistant, Durable, Sandable, Paintable, NSF Approved for Food Contact See more | | UPC | 338860051048 | | Unit Count | 10.1 Fluid Ounces | | Viscosity Level | Medium | | Volume | 300 ml | | Warranty Description | Manufacturer Warranty | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** AP Products - **Item Form:** Product - **Material:** Polyurethane-based adhesive - **Specific Uses For Product:** Bus, RV, Trailer, Truck ## Images ![017-90892 Sikaflex-221, Aluminum Gray - Image 1](https://m.media-amazon.com/images/I/41VQZYvXzwL.jpg) ## Questions & Answers **Q: Will this adhere well to wood?** A: This stuff sticks to anything better than any product I've ever used. It will stick to wood really well. **Q: Would this work to attach flexible solar panels to the roof of a cargo van?** A: Contrary to the other answers, the Sikaflex manufacturer's website indicates that it is also a high strength adhesive: Sikaflex®-221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive. 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. **Q: would this be great stuff to seal an aluminum enclosed trailer roof?** A: I am on a horse trailer forum and this was recommended by several people with 60+ years in trailer repair. They swear by it. **Q: Can 221 be used for Aluminum Boat repair below water line?** A: Not positive but think it can not be used like that ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best Sealant on the Market! *by M***S on August 27, 2026* I believe this is the best sealant on the market. Sikaflex is used by Airstream in their factory for sealing them. I used it to better seal my windows on my airstream. The color matched perfectly and the flexibility really is good for sealing aluminum that is pieced together by rivets. The application was very easy and so was the cleanup. The finished product seems lasting and the sealant dries fasty for quick results. If you have an Airstream or any RV, I would recommend this product. It comes in various colors to meet your needs. Satisfied Customer! ### ⭐⭐⭐⭐⭐ Good stuff *by T***O on May 1, 2026* As others have noted, these polyurethane adhesives are just awful to work with… sticky, gooey, and get on everything if you’re not careful. But that’s kinda the point. Tape everything off and go at it (and then after pulling the tape and admiring the clean lines, decide you want to do a few minor touch ups and make a huge embarrassing mess) I might come back and add pics if my off-label use case on a PVC dinghy works… and if I can clean it up a bit today.. ### ⭐⭐⭐⭐⭐ Great for Camper Caulking *by H***I on January 9, 2025* I have a vintage Avion camper and bought this to caulk the seals and windows. My camper is anodized aluminum so I had to purchase the right sealant. Was not advised to use silicone caulk so I stumbled upon this Sikaflex sealant. I purchased smaller syringes to fill up and piped the sealant on the seams and around the windows with ease. Still have more sealing to do but very satisfied with this product. ## Frequently Bought Together - AP Products 017-90892 Sikaflex-221, Aluminum Gray - Sika Sikaflex-221 - Aluminum Gray - Multi-Purpose Polyurethane sealant/Adhesive - Creates Permanent Elastic Seal - Sandable/paintable - Non-Corrosive - 10.1 fl. Oz (Pack of 24) - 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.pt/products/20033231-017-90892-sikaflex-221-aluminum-gray](https://www.desertcart.pt/products/20033231-017-90892-sikaflex-221-aluminum-gray) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-18*