---
product_id: 58062586
title: "Sikaflex 521, White, UV Resistant Low Modulus Sealant, 300ml Cartridge"
brand: "sika"
price: "63931CFA"
currency: XOF
in_stock: true
reviews_count: 3
category: "Sika"
url: https://www.desertcart.sn/products/58062586-sikaflex-521-white-uv-resistant-low-modulus-sealant-300ml-cartridge
store_origin: SN
region: Senegal
---

# High Electrical Resistance Water Resistant Formula UV Resistant Sealant Sikaflex 521, White, UV Resistant Low Modulus Sealant, 300ml Cartridge

**Brand:** sika
**Price:** 63931CFA
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it like a pro — don’t let leaks cramp your style!

## Quick Answers

- **What is this?** Sikaflex 521, White, UV Resistant Low Modulus Sealant, 300ml Cartridge by sika
- **How much does it cost?** 63931CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/58062586-sikaflex-521-white-uv-resistant-low-modulus-sealant-300ml-cartridge)

## 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

- • **Compact & Ready:** 300ml cartridge designed for easy application with a caulk gun
- • **Powerful Adhesion:** Strong grip on aluminum, wood, plastic & more for lasting durability
- • **Weatherproof Seal:** Water-resistant barrier that stands up to heavy rain and moisture
- • **Ultimate UV Defense:** Keeps your seals flawless under relentless sun exposure
- • **Versatile Compatibility:** Perfect for solar panels, yachts, RVs, and diverse surfaces

## Overview

Sikaflex 521 is a premium white, low modulus polyurethane sealant offering superior UV resistance and high electrical insulation. Packaged in a 300ml cartridge, it delivers a durable, water-resistant seal compatible with multiple materials including metal, wood, plastic, and glass. Ideal for demanding outdoor applications like solar panel installations, marine use, and RV maintenance, it ensures long-lasting adhesion and protection against weathering.

## Description

NA

Review: Works great - Used this in a recent solar panel install on a van and so far seems to work great. Been through one very significant rainfall about a week after install and everything seems to be sealed tight. Along with sealing our install, it also seems to have a very strong adhesion as even when things are unscrewed, still holding on strong. Made the mistake of forgetting a caulk gun...don't do that, not too easy to apply without it.
Review: The best on the market - I use this product on the desk of my yacht with excellent performance. Also use it on the exterior of my older RV while the old sealant is dry, cracking and not holding the trim in place. The UV additive and consistency makes it the best buy. I have given up on 3M 5200/4200.

## Features

- Safety data sheet available on request.
- High electrical resistance
- Resistant to UV radiation
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005FCIB04 |
| Brand | Sika |
| Colour | White |
| Compatible Material | Aluminium, Ceramic, Plastic, Wood |
| Customer Reviews | 3.8 out of 5 stars 17 Reviews |
| Global Trade Identification Number | 07612894448689 |
| Item Dimensions | 5.1 x 5.1 x 35.6 centimetres |
| Item Form | Liquid |
| Item Type Name | Great Product |
| Item Weight | 454 g |
| Item dimensions L x W x H | 5.1 x 5.1 x 35.6 centimetres |
| Item weight | 454 g |
| Manufacturer | Sika |
| Manufacturer Part Number | 106096 |
| Material | Polyurethane |
| Model Number | SIKA-106096 |
| Number of Items | 1 |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Glass, Metal, Plastic, Wood |
| Unit Count | 10.1 millilitre |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |

## Product Details

- **Brand:** Sika
- **Item dimensions L x W x H:** 5.1 x 5.1 x 35.6 centimetres
- **Item weight:** 454 g
- **Material:** Polyurethane
- **Style:** Compact

## Images

![Sikaflex 521, White, UV Resistant Low Modulus Sealant, 300ml Cartridge - Image 1](https://m.media-amazon.com/images/I/41xFwdl2YFL.jpg)

## Questions & Answers

**Q: Is this product self leveling?**
A: no but it is the ultimate for sidewall applications.  They make a self leveling silkaflex

**Q: Can i use sikaflex 521 uv under water?**
A: Not sure but I believe it needs to cure in the open air then it would be fine

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by P***W on 1 May 2025*

Used this in a recent solar panel install on a van and so far seems to work great. Been through one very significant rainfall about a week after install and everything seems to be sealed tight. Along with sealing our install, it also seems to have a very strong adhesion as even when things are unscrewed, still holding on strong. Made the mistake of forgetting a caulk gun...don't do that, not too easy to apply without it.

### ⭐⭐⭐⭐⭐ The best on the market
*by K***A on 13 April 2019*

I use this product on the desk of my yacht with excellent performance. Also use it on the exterior of my older RV while the old sealant is dry, cracking and not holding the trim in place. The UV additive and consistency makes it the best buy. I have given up on 3M 5200/4200.

### ⭐⭐⭐ Ask about product date before purchase.
*by T***O on 28 February 2021*

Purchase or be advised this product has the best before date. I was unaware of this when I purchased it and found out the best before date is only good for 7 months after I received it.

## Frequently Bought Together

- Sikaflex 521, White, UV Resistant Low Modulus Sealant, 300ml Cartridge
- AP Products 017-187690 Sikaflex-715
- 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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**Shop now:** [https://www.desertcart.sn/products/58062586-sikaflex-521-white-uv-resistant-low-modulus-sealant-300ml-cartridge](https://www.desertcart.sn/products/58062586-sikaflex-521-white-uv-resistant-low-modulus-sealant-300ml-cartridge)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-10*