---
product_id: 57255900
title: "Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml"
brand: "sika"
price: "₩84881"
currency: KRW
in_stock: true
reviews_count: 13
category: "Sika"
url: https://www.desertcart.kr/products/57255900-sikaflex-521-uv-weathering-resistant-stp-adhesive-sealant-multipurpose-low
store_origin: KR
region: South Korea
---

# Paintable & sandable finish Superior weather & age resistance 300ml professional-grade cartridge Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml

**Brand:** sika
**Price:** ₩84881
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the deal with pro-grade strength and weatherproof confidence!

## Quick Answers

- **What is this?** Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml by sika
- **How much does it cost?** ₩84881 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/57255900-sikaflex-521-uv-weathering-resistant-stp-adhesive-sealant-multipurpose-low)

## 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 & Adaptable:** Solvent-free, isocyanate-based sealant that’s paintable and sandable after curing
- • **All-Weather Ready:** Perfect for both interior and exterior projects, maintaining integrity in any environment
- • **Professional Grade:** Designed specifically for expert applicators with low odour and easy handling
- • **Unmatched Durability:** Flexible polymer formula resists aging and harsh weather for long-lasting bonds
- • **Versatile Application:** Bonds timber, metals, ceramics, plastics—no priming needed

## Overview

Sika Sikaflex 521 UV is a 300ml professional-grade STP adhesive sealant engineered for superior weather and age resistance. Its flexible, solvent-free formula bonds a wide range of materials without priming, cures to a paintable and sandable finish, and is suitable for both interior and exterior use. Trusted by professionals for durable, low-odour application in demanding environments.

## Description

Shop Sika Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml. Free delivery on eligible orders of £20 or more.

Review: Sika really works - Great product because is really works.
Review: Brilliant product - Wouldn’t use anything else this is a great project

## Features

- Contains Trimethoxyvinylsilane. May produce an allergic reaction.
- Safety data sheet available on request.
- PROFESSIONAL PRODUCT – Designed for use by professional applicators.
- DURABLE FORMULA – Once cured, this flexible polymer adhesive is resistant to ageing and weathering, ensuring long-lasting bonds.
- WIDE RANGE OF APPLICATIONS – Ideal for bonding a wide range of substrates without the need for priming, including timber, metals, metal primers and paint coatings, ceramic materials and plastics.
- ADAPTABLE AND SAFE – This Sikaflex sealant is crafted from isocyanate and is solvent-free, meaning it's flexible and can be safely sanded and painted once cured.
- SUITABLE FOR INTERIOR AND EXTERIOR USE – Use this hardwearing, long-lasting and protected grey sealant anywhere regular or flexible finishes are required.
- THREE COLOURS AVAILABLE – Apply this light grey sealant using a hand, pneumatic or electric-driven piston gun. Also available in white and black.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BEFGCE8 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 24,821 in DIY & Tools ( See Top 100 in DIY & Tools ) 3 in Adhesive Caulk |
| Colour | Light Grey |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,680) |
| Date First Available | 10 Nov. 2013 |
| Included components | 1 cartridge |
| Item Package Quantity | 1 |
| Item Weight | 420 g |
| Item model number | 512UV |
| Manufacturer | Sika |
| Material | Polyurethane Silicone silicone Polyvinyl chloride |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part number | 62139 |
| Product Dimensions | 5 x 5 x 21 cm; 420 g |
| Size | 300ml |
| Specific uses | Professional |
| Style | single |
| Volume | 300 Millilitres |

## Product Details

- **Brand:** Sika
- **Colour:** Light Grey
- **Full cure time:** 3E+1 Minutes
- **Item weight:** 0.42 Kilograms
- **Liquid volume:** 300 Millilitres

## Images

![Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml - Image 1](https://m.media-amazon.com/images/I/51JsoqssyBL.jpg)

## Questions & Answers

**Q: is there supposed to be a Caulk Nozzles with this item.**
A: Mine didn't have any, can buy packs of five nozzles from wickes or similar shops...

**Q: Whats the expiry date of this product**
A: This is dependant on the batch purchased, details will be present on the tube

**Q: Which product is best for bonding in windows on steel narrow boat?**
A: I send the black version for resealing fibreglass roof to windscreen area on motor home 9 months ago. Still holding well.
I used the white version for sealing in a new skylight on motorhome. Once again, no issues so far. That was about a year ago.

**Q: Is this suitable to glue a solar panel to camper van roof**
A: Unfortunately the Sikaflex 521UV would not be suitable

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sika really works
*by J***E on 7 September 2025*

Great product because is really works.

### ⭐⭐⭐⭐⭐ Brilliant product
*by A***K on 7 September 2025*

Wouldn’t use anything else this is a great project

### ⭐⭐⭐⭐⭐ Weather proof joints in car prodject
*by M***F on 14 November 2025*

Used on defender roof gutter rail prior to painting great product

## Frequently Bought Together

- Sika Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml
- Sika Mounting Adhesive - Sikaflex-554 Black - Ideal for Large Components and High Dynamic Load - Ageing and Weather Resistant - 300 ml
- Sika Sikaflex-522 Caravan And Motorhome Adhesive Sealant – Weather And Mould Resistant – White – 300ml

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**Shop now:** [https://www.desertcart.kr/products/57255900-sikaflex-521-uv-weathering-resistant-stp-adhesive-sealant-multipurpose-low](https://www.desertcart.kr/products/57255900-sikaflex-521-uv-weathering-resistant-stp-adhesive-sealant-multipurpose-low)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-28*