---
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: "$U1579"
currency: UYU
in_stock: true
reviews_count: 5
category: "Sika"
url: https://www.desertcart.uy/products/304313725-sikaflex-221-black-multi-purpose-polyurethane-sealant-adhesive-creates-permanent
store_origin: UY
region: Uruguay
---

# Seawater & acid resistant Sandable & paintable 1-component polyurethane Sikaflex-221 - Black - Multi-purpose polyurethane sealant/adhesive - Creates permanent elastic seal - Sandable/paintable - Non-corrosive - 10.1 fl oz

**Brand:** sika
**Price:** $U1579
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it once, seal it right — the pro’s choice for lasting strength!

## 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?** $U1579 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/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

- • **Flexible & Tough Seal:** Cures to a durable elastomer that handles vibration and movement without cracking
- • **Ready-to-Use Precision:** Cartridge fits all standard guns for clean, accurate application every time
- • **Weatherproof & Age-Defiant:** Formulated to resist seawater, acids, and harsh elements for lasting durability
- • **Ultimate Multi-Surface Bonding:** Bonds metals, plastics, ceramics & more with permanent elastic strength
- • **Safe for Sensitive Environments:** NSF-approved for drinking water and food production safety standards

## Overview

Sikaflex-221 is a premium black polyurethane sealant/adhesive that cures on moisture exposure to form a flexible, permanent bond across diverse materials including metals, plastics, and ceramics. Its age-resistant, non-corrosive formula withstands seawater, acids, and vibration, making it ideal for demanding automotive and industrial applications. Ready-to-use in a convenient cartridge, it’s NSF-approved for safe use in drinking water and food environments, and can be sanded or painted for a flawless finish.

## 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.

Review: I used Sikaflex to adhere a roof wing to the back windshield of my car, and I’m seriously impressed with how well it worked. The bond is incredibly strong and feels permanent once cured. I let it set for about 24 hours before driving, and even after months of highway speeds and temperature changes, the wing hasn’t budged at all. The application was pretty straightforward, it has a thick, tacky consistency that gives you enough working time to position everything correctly before it starts to set. I’d recommend taping or clamping the part in place while it cures, because it does take a while to fully harden. Once cured, it’s flexible enough to handle vibration and movement, which is great for automotive use. One thing to note: this stuff is messy. It’s sticky, and once it gets on your hands or paint, it’s not easy to remove. Wear gloves, mask off surrounding areas, and have some cleaner or mineral spirits ready. Overall, Sikaflex delivered exactly what I needed, a strong, weatherproof, and vibration resistant bond that’s holding my roof wing securely in place. It’s not the cheapest adhesive, but it’s worth it for the strength and reliability.
Review: Very good

## 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 |
| Batteries | 1 Nonstandard Battery batteries required. |
| Best Sellers Rank | #3,810 in Automotive ( See Top 100 in Automotive ) #18 in Automotive Fillers, Adhesives & Sealants |
| Brand | SIKA |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,423) |
| Date First Available | 16 January 2015 |
| Item Weight | 286 g |
| Item model number | 017-90893 |
| Manufacturer | SIKA |
| Manufacturer Part Number | 017-90893 |
| Model | 017-90893 |
| Product Dimensions | 30.48 x 5.08 x 30.48 cm; 286.33 g |
| Special Features | Stain resistant |

## 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** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by O***A on 6 October 2025*

I used Sikaflex to adhere a roof wing to the back windshield of my car, and I’m seriously impressed with how well it worked. The bond is incredibly strong and feels permanent once cured. I let it set for about 24 hours before driving, and even after months of highway speeds and temperature changes, the wing hasn’t budged at all. The application was pretty straightforward, it has a thick, tacky consistency that gives you enough working time to position everything correctly before it starts to set. I’d recommend taping or clamping the part in place while it cures, because it does take a while to fully harden. Once cured, it’s flexible enough to handle vibration and movement, which is great for automotive use. One thing to note: this stuff is messy. It’s sticky, and once it gets on your hands or paint, it’s not easy to remove. Wear gloves, mask off surrounding areas, and have some cleaner or mineral spirits ready. Overall, Sikaflex delivered exactly what I needed, a strong, weatherproof, and vibration resistant bond that’s holding my roof wing securely in place. It’s not the cheapest adhesive, but it’s worth it for the strength and reliability.

### ⭐⭐⭐⭐⭐ Review
*by H***M on 3 November 2023*

Very good

### ⭐⭐⭐⭐⭐ Review
*by K***Y on 27 November 2023*

Great brand always works

## Frequently Bought Together

- Sika Sikaflex-221 - Black - Multi-Purpose Polyurethane sealant/Adhesive - Creates Permanent Elastic Seal - Sandable/paintable - Non-Corrosive - 10.1 fl oz
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- Dicor BT-1834-1 Butyl Seal Tape - 1/8" x 3/4" x 30' Repair Tape for RV, Trailer, Motorhome, Window, and Vent Sealing

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-10*