---
product_id: 112797753
title: "Sikaflex-221 Multi-Purpose Sealant/Adhesive, Gray, 10.1 fl. oz – Fast-Curing Polyurethane, Highly Elastic, Weather-Resistant, Sandable & Paintable, Bonds to Wood, Metal, and Plastics"
brand: "sika"
price: "16237 Ft"
currency: HUF
in_stock: true
reviews_count: 13
category: "Sika"
url: https://www.desertcart.hu/products/112797753-sikaflex-221-multi-purpose-sealant-adhesive-gray-10-1-fl
store_origin: HU
region: Hungary
---

# Fast initial cure in 2 hours Weather-resistant & water resistant Bonds metal, wood & plastics Sikaflex-221 Multi-Purpose Sealant/Adhesive, Gray, 10.1 fl. oz – Fast-Curing Polyurethane, Highly Elastic, Weather-Resistant, Sandable & Paintable, Bonds to Wood, Metal, and Plastics

**Brand:** sika
**Price:** 16237 Ft
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it, bond it, own it — the pro’s choice for unstoppable adhesion!

## Quick Answers

- **What is this?** Sikaflex-221 Multi-Purpose Sealant/Adhesive, Gray, 10.1 fl. oz – Fast-Curing Polyurethane, Highly Elastic, Weather-Resistant, Sandable & Paintable, Bonds to Wood, Metal, and Plastics by sika
- **How much does it cost?** 16237 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/112797753-sikaflex-221-multi-purpose-sealant-adhesive-gray-10-1-fl)

## 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

- • **Versatile Bonding Power:** Seamlessly adheres to metals, wood, plastics & ceramics for all your project needs.
- • **Professional-Grade & Safe:** NSF-approved for drinking water and food production environments—performance without compromise.
- • **User-Friendly Application:** Ready-to-use cartridge fits all standard guns for precise, mess-controlled sealing and bonding.
- • **Weatherproof & Age-Resistant:** Engineered to withstand seawater, acids, UV, and temperature fluctuations without losing elasticity.
- • **Rapid Tack & Long-Term Strength:** Initial hardening in 2 hours with full cure in 5-7 days ensures quick progress and lasting durability.

## Overview

Sikaflex-221 is a fast-curing, highly elastic polyurethane sealant and adhesive in aluminum gray, designed for professional-grade bonding and sealing. It offers versatile adhesion to metal, wood, plastics, and ceramics, resists harsh weather and chemicals, and cures quickly with a strong, flexible finish. NSF-approved and easy to apply, it’s ideal for automotive, marine, and industrial applications requiring durable, water-resistant seals.

## 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 for RV - Oh this is the stuff you want working on bare metal airstream! Works very well on vertical walls, you can probably use it on the roof too but this isnt self leveling. Used it to seal all the marker lights, windows, doors, etc.

## Features

- VERSATILITY AND QUALITY IN ONE - Sometimes simply called Sika 221 aluminum gray, 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 221 gray 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 | B01GDN4AAI |
| Best Sellers Rank | #1,838 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Polyurethane Adhesives |
| Brand | SIKA |
| Color | Aluminum Gray |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,780) |
| Date First Available | June 6, 2016 |
| Full Cure Time | 5-7 Days |
| Initial Hardening Time | 2 Hours |
| Item Form | Liquid |
| Item Weight | 12.3 ounces |
| Item model number | SIKA-90892 |
| Liquid Volume | 10.3 Fluid Ounces |
| Manufacturer | Sika |
| Manufacturer Part Number | 90892 |
| Material | Polyurethane |
| Maximum Gap Fill | 1 Inches |
| Model | Sikaflex 221 |
| Number of Items | 1 |
| Product Dimensions | 12 x 2 x 12 inches |
| Special Features | Stain resistant |
| Surface Recommendation | Metal, Wood, Glass |
| Temperature Range | 40-100 Degrees Fahrenheit |
| UPC | 033886005104 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** SIKA
- **Color:** Aluminum Gray
- **Full Cure Time:** 5-7 Days
- **Item Weight:** 350 Grams
- **Liquid Volume:** 10.3 Fluid Ounces

## Images

![Sikaflex-221 Multi-Purpose Sealant/Adhesive, Gray, 10.1 fl. oz – Fast-Curing Polyurethane, Highly Elastic, Weather-Resistant, Sandable & Paintable, Bonds to Wood, Metal, and Plastics - Image 1](https://m.media-amazon.com/images/I/51dlzDcXfvL.jpg)

## Available Options

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

## Questions & Answers

**Q: Would this work as a sealant on the abs fitting that inserts into the rv poly holding tank outlet and has a hose clamp?**
A: Re UV protection.  It is widely used on RV roofs so presumably is at least UV resistant.  That said, I've found that it lasts only about 3 years on the roof of an RV that sits out in the sun.  It is necessary to check it annually and rough up the existing material and add more where cracks have developed.  The cracks are in part from expansion and contraction of the underlying parts, but do work their way up through the Sikaflex 221 and result in a leak of the crack is not repaired.  I inspect my RV roof annually and usually need to do some repair to the older Sikaflex-221.

**Q: Is this suitable for bonding a window into an aluminium u-channel on an rv? also, can i remove it if need be? thank you**
A: Precisely the application to which I put the material to use in - sealing RV windshield to aluminum and fibreglass.  Has worked flawlessly for 4 years.  Easy to remove before cure; extremely difficult to fully remove after cure.

**Q: Can someone verify if inventory issue fixed, ordered two blacks and received both white (stamped inside bottom of tube)**
A: I have always received the correct color ordered (fulfilled by Amazon).  Contact the Seller directly (or whoever is fulfilling an order on their behalf), to confirm inventoried colors.  I would request a refund for any product that is not what you ordered.

**Q: Do you recommend this for filling in concrete floor cracks? Will it self-level?**
A: Not sure on concrete it may hold up but it will not self-level

## 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 for RV
*by I***S on February 6, 2026*

Oh this is the stuff you want working on bare metal airstream! Works very well on vertical walls, you can probably use it on the roof too but this isnt self leveling. Used it to seal all the marker lights, windows, doors, etc.

### ⭐⭐⭐⭐⭐ 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!

## Frequently Bought Together

- Sika Sikaflex-221, Gray, multi-purpose sealant/adhesive, polyurethane fast curing sealant, 10.1 fl. oz Cartridge
- 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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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-23*