---
product_id: 57255900
title: "Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml"
brand: "sika"
price: "31511CFA"
currency: XOF
in_stock: true
category: "Sika"
url: https://www.desertcart.sn/products/57255900-sika-sikaflex-521-uv-stp-adhesive-sealant-black-300ml
store_origin: SN
region: Senegal
---

# Cures in ~30 mins Weather & age resistant Paintable & sandable finish Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml

**Brand:** sika
**Price:** 31511CFA
**Availability:** ✅ In Stock

## Summary

> 🔗 Seal the deal with pro-grade strength and style!

## Quick Answers

- **What is this?** Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml by sika
- **How much does it cost?** 31511CFA 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/57255900-sika-sikaflex-521-uv-stp-adhesive-sealant-black-300ml)

## 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 and isocyanate-based for flexible, paintable, and sandable finishes.
- • **All-Weather Ready:** Perfect for interior and exterior use, resisting weathering and aging with ease.
- • **Fast Curing Formula:** Achieves full cure in just 30 minutes, accelerating your project timeline.
- • **Pro-Grade Durability:** Engineered for professionals, ensuring reliable, long-lasting bonds every time.
- • **Versatile Bonding Power:** Bonds timber, metals, ceramics, plastics—no primer needed, saving you prep time.

## Overview

Sika Sikaflex 521 UV STP is a professional-grade, fast-curing adhesive sealant designed for durable, weather-resistant bonds across multiple surfaces. Its solvent-free, paintable formula ensures flexible, long-lasting finishes suitable for both interior and exterior applications.

## Description

Shop Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml | Weathering Resistant – Age Resistant – Low Odour – Overpaintable – STP Silane Terminated Polymer. Free delivery on eligible orders of £20 or more.

## Features

- Contains Trimethoxyvinylsilane. May produce an allergic reaction.
- Warning! Hazardous respirable droplets may be formed when sprayed. Do not breathe spray or mist.
- 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 |
| Best Sellers Rank | 9,383 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Adhesive Caulk |
| Brand | Sika |
| Colour | Light Grey |
| Country Of Origin | Switzerland |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,828) |
| Full Cure Time | 3E+1 Minutes |
| Global Trade Identification Number | 07612894184518 |
| Included Components | 1 cartridge |
| Item Form | Paste |
| Item Highlight | Weathering Resistant – Age Resistant – Low Odour – Overpaintable – STP Silane Terminated Polymer |
| Item Type Name | Sealant and Adhesive |
| Item Weight | 0.42 Kilograms |
| Liquid Volume | 300 Millilitres |
| Manufacturer | Sika |
| Manufacturer Part Number | 62139 |
| Material | Polyurethane Silicone silicone Polyvinyl chloride |
| Model Number | 512UV |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Warranty | Product guarantees 0 months. |
| Surface Recommendation | Door, Metal, Pipe, Wood |
| Unit Count | 300.0 millilitre |
| Water Resistance Level | Water Resistant |

## Product Details

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

## Images

![Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml - Image 1](https://m.media-amazon.com/images/I/51JsoqssyBL.jpg)

## Available Options

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

## 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

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sn/products/57255900-sika-sikaflex-521-uv-stp-adhesive-sealant-black-300ml](https://www.desertcart.sn/products/57255900-sika-sikaflex-521-uv-stp-adhesive-sealant-black-300ml)

---

*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-11-15*