---
product_id: 616929653
title: "Sikaflex-221, Black, Multi-Purpose Polyurethane Sealant & Adhesive, Permanent Elastic Seal, Sandable/Paintable, NSF Approved for Drinking Water, 10.1 (Pack of 24)"
brand: "sika"
price: "HK$3530"
currency: HKD
in_stock: true
reviews_count: 8
category: "Sika"
url: https://www.desertcart.hk/products/616929653-sikaflex-221-black-multi-purpose-polyurethane-sealant-and-adhesive-permanent
store_origin: HK
region: Hong Kong
---

# 2-hour initial hardening NSF approved for drinking water 1-component urethane paste Sikaflex-221, Black, Multi-Purpose Polyurethane Sealant & Adhesive, Permanent Elastic Seal, Sandable/Paintable, NSF Approved for Drinking Water, 10.1 (Pack of 24)

**Brand:** sika
**Price:** HK$3530
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Sikaflex-221, Black, Multi-Purpose Polyurethane Sealant & Adhesive, Permanent Elastic Seal, Sandable/Paintable, NSF Approved for Drinking Water, 10.1 (Pack of 24) by sika
- **How much does it cost?** HK$3530 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/616929653-sikaflex-221-black-multi-purpose-polyurethane-sealant-and-adhesive-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

- • **Safe for Critical Use:** NSF certified for drinking water & food production environments—no compromises
- • **Flexible & Permanent Seal:** Elastic cure handles vibration & movement, perfect for automotive & industrial needs
- • **Precision Application Ready:** Cartridge fits electric, pneumatic & manual guns for clean, accurate placement
- • **Weatherproof & Age-Resistant:** Engineered to resist seawater, acids, and harsh elements for lasting durability
- • **Ultimate Multi-Surface Bonding:** Bonds metals, plastics, ceramics & more with professional-grade strength

## Overview

SIKA Sikaflex-221 is a black, one-component polyurethane sealant and adhesive designed for permanent elastic seals and strong bonds across metals, plastics, ceramics, and more. It cures quickly with an initial set in 2 hours and full cure in 5-7 days, offering waterproof, age-resistant performance. NSF approved for drinking water use, it’s ideal for professional-grade applications requiring durability, flexibility, and safety.

## 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: Perfect for automotive use - 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: Great stuff - This stuff is fantastic, especially for bonding hard to glue plastics. Be sure to wear gloves - it is very durable on skin!

## 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 | B094G4WQVH |
| Best Sellers Rank | #2,161 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #205 in Adhesive Caulk #341 in Industrial Sealants #33,237 in Hardware |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 2,744 Reviews |
| Full Cure Time | 5-7 Days |
| Global Trade Identification Number | 10033886005118 |
| Included Components | Sealant |
| Initial Hardening Time | 2 Hours |
| Item Form | Paste |
| Item Height | 12 inches |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | SIKA |
| Material Type | Polyurethane |
| Maximum Gap Fill | 1 Inches |
| Surface Recommendation | Metal, Wood, Glass |
| Unit Count | 24.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** SIKA
- **Color:** Black
- **Full Cure Time:** 5-7 Days
- **Initial Hardening Time:** 2 Hours
- **Liquid Volume:** 10.1 Fluid Ounces

## Images

![Sikaflex-221, Black, Multi-Purpose Polyurethane Sealant & Adhesive, Permanent Elastic Seal, Sandable/Paintable, NSF Approved for Drinking Water, 10.1 (Pack of 24) - Image 1](https://m.media-amazon.com/images/I/8102+2Dx9jL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect for automotive use
*by O***A on October 6, 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.

### ⭐⭐⭐⭐⭐ Great stuff
*by H***D on January 1, 2026*

This stuff is fantastic, especially for bonding hard to glue plastics. Be sure to wear gloves - it is very durable on skin!

### ⭐⭐⭐⭐⭐ Excellent product.
*by B***P on November 30, 2025*

Recommended by Chat for the exterior trim on my van. It worked perfectly, and sealed the joints where silicone had repeatedly failed.

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-08*