---
product_id: 19276946
title: "Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More"
price: "€ 27.35"
currency: EUR
in_stock: true
reviews_count: 13
url: https://www.desertcart.pt/products/19276946-sikaflex-221-multi-purpose-polyurethane-sealant-adhesive-10-1-fl
store_origin: PT
region: Portugal
---

# Full cure in 3 hours Waterproof & seawater resistant 10.1 fl oz precision cartridge Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More

**Price:** € 27.35
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it like a pro — permanent, flexible, and ready for anything!

## Quick Answers

- **What is this?** Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More
- **How much does it cost?** € 27.35 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/19276946-sikaflex-221-multi-purpose-polyurethane-sealant-adhesive-10-1-fl)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durability That Lasts:** Age-resistant formula stands strong against UV, seawater, acids, and harsh environments.
- • **Pro-Grade Application:** Ready-to-use cartridge fits all standard guns for clean, precise, and efficient sealing.
- • **Safe for Critical Use:** NSF-approved for drinking water and food production—performance without compromise.
- • **Versatile Bonding Power:** Bonds permanently to metal, plastics, ceramics & more for unmatched multi-surface reliability.
- • **Flexible & Sandable Finish:** Elastic sealant cures to a paintable, sandable surface that moves with your project.

## Overview

Sikaflex-221 is a professional-grade, black polyurethane sealant and adhesive offering a permanent elastic bond to metals, plastics, ceramics, and more. It cures fully in 3 hours, is waterproof and resistant to aging, seawater, and chemicals, and is NSF-approved for use in drinking water and food environments. Packaged in a convenient 10.1 fl oz cartridge, it’s designed for precise application and finishes that can be sanded and painted, making it the go-to solution for durable, flexible sealing and bonding.

## Description

When you need a professional-grade elastic seal or bond, there's one name you can trust: The Sika Sikaflex-221. This multi-purpose adhesive & sealant creates permanent bonds to a wide variety of substrates to give you maximum versatility and range. It's a low-odor, non-corrosive compound that's easy and convenient to work with. For optimal performance, surfaces should be clean and free of any debris, dirt, grease, oil or dust, then dried prior to application. Complete tooling and finishing before skin forms, typically within an hour of use.

Review: quality product - glad I found it - used this for a repair that needed waterproof and permanent - this applied on easy and so far 100% resolved issue! I used AI to recommend product off desertcart after uploading to AI a photo of the damage and this is what it recommended.
Review: Professional grade sealant. - Before I retired, my company was excellent at ceiling water leaks. Sika was the best product in areas exposed to ultraviolet light. I recently used it when installing a new skylight on my RV. Knowing that it’s difficult to clean up, I blue taped all edges and had rags with solvent nearby. The job went very smoothly, I was impressed how easily it adhered and spread evenly. Cleanup turned out to be no problem for me.

## 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 | #929 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Polyurethane Adhesives |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 2,902 Reviews |
| Full Cure Time | 3 Hours |
| Included Components | AP Products 017-90893 Sikaflex-221, Black |
| 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 | Metal, Wood, Glass |
| Unit Count | 10.1 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** SIKA
- **Color:** Black
- **Full Cure Time:** 3 Hours
- **Item Weight:** 10.1 Ounces
- **Liquid Volume:** 10.1 Fluid Ounces

## Images

![Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More - Image 1](https://m.media-amazon.com/images/I/6177TD7R3eL.jpg)
![Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More - Image 2](https://m.media-amazon.com/images/I/71G8vEt0vxL.jpg)
![Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More - Image 3](https://m.media-amazon.com/images/I/81QDAJXLKBL.jpg)
![Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More - Image 4](https://m.media-amazon.com/images/I/71l8Iq5SN-L.jpg)
![Sikaflex-221 Multi-Purpose Polyurethane Sealant/Adhesive, 10.1 fl oz, Black – Permanent Elastic Seal, Sandable & Paintable, Non-Corrosive, Bonds to Metal, Plastics & More - Image 5](https://m.media-amazon.com/images/I/71RRO7yzOdL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ quality product - glad I found it
*by D***C on May 19, 2026*

used this for a repair that needed waterproof and permanent - this applied on easy and so far 100% resolved issue! I used AI to recommend product off amazon after uploading to AI a photo of the damage and this is what it recommended.

### ⭐⭐⭐⭐⭐ Professional grade sealant.
*by R***E on April 1, 2026*

Before I retired, my company was excellent at ceiling water leaks. Sika was the best product in areas exposed to ultraviolet light. I recently used it when installing a new skylight on my RV. Knowing that it’s difficult to clean up, I blue taped all edges and had rags with solvent nearby. The job went very smoothly, I was impressed how easily it adhered and spread evenly. Cleanup turned out to be no problem for me.

### ⭐⭐⭐⭐⭐ Great caulk!
*by J***R on May 26, 2026*

This stuff is robust. It’s easy to apply and finish, looks great and holds up to standing water (so far). On the pricier side but you get what you pay for, it should hold up!

## 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

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**Shop now:** [https://www.desertcart.pt/products/19276946-sikaflex-221-multi-purpose-polyurethane-sealant-adhesive-10-1-fl](https://www.desertcart.pt/products/19276946-sikaflex-221-multi-purpose-polyurethane-sealant-adhesive-10-1-fl)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-06-06*