Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml

4.6 (922)

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml

Overall Rating: 2.3 / 5 (average from multiple review sources, as of 18 Oct 2026)
Based on a total of 48,210 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Cheapest Total Price
In stock
Direct debit Direct debit Mastercard Mastercard Visa Visa
£15.58
£51.93 / l
Free Delivery

Sika Sikaflex 521 UV Black Adhesive Sealant WeatherResistant, 300ml Paintable

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 3 - 4 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£20.31
Free Delivery

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive S

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 6 - 13 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£20.50
Free Delivery

Sikaflex 521 UV – Weathering Resistant Silane Terminated Polymer Adhesive S...

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 3 - 4 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£20.74
Free Delivery

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesiv

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 1 working day of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£20.84
Free Delivery

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesiv

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 3 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£20.98
Free Delivery

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesiv

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 1 - 3 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£21.05
Free Delivery

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive S

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 3 - 7 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£21.16
Free Delivery

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated 300ml, Black

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 3 working days of receiving cleared payment.
Other Other PayPal PayPal Wallet Wallet Mastercard Mastercard Visa Visa Apple Pay Apple Pay Diners Club Diners Club
£21.71
Free Delivery
  • 1
  • 2
Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml

Cheapest offer

PROFESSIONAL PRODUCT - Designed for use by professional applicators. SUITABLE FOR USE ON MULTIPLE SUBSTRATES - Use it to bond or seal various materials, including timber, metals, metal primers and paint coatings (2-component systems), ceramic materials and plastics. IDEAL FOR INTERNAL AND EXTERNAL USE - Isocyanate and solvent-free black adhesive and sealant ideal for multiple applications. NO SPECIAL PRE-TREATMENTS REQUIRED - Bonds and seals a wide variety of materials with no need for special pre-treatments. LONG LASTING - Sikaflex 521 UV black is age and weathering-resistant, delivering a bond that lasts. HIGH QUALITY FINISH - Both sandable and overpaintable to enable you to create a seamless look whatever the job.
£15.58
In stock
amazon.co.uk

🤖 Ask ChatGPT

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml - Details

▶ Finding you the best price!

We have found 9 prices for Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml. Our price list is completely transparent with the cheapest listed first. Additional delivery costs may apply.

Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml - Price Information

  • Cheapest price: £15.58
  • The cheapest price is offered by amazon.co.uk. You can order the product there.
  • The price range for Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml is £15.58 to £26.36, with a total of 9 offers.
  • Payment methods: The online shop amazon.co.uk supports: Direct debit, Mastercard, Visa
  • Delivery: The shortest delivery time is In stock working days offered by amazon.co.uk.

Similar products

Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml | Weathering Resistant - Age Resistant - Low Odour - Overpaintable - STP Silane Terminated Polymer
Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml | Weathering Resistant - Age Resistant - Low Odour - Overpaintable - STP Silane Terminated Polymer
£15.58
Go to shop
amazon.co.uk
Free Delivery
SIKA - Adhesive and Sealant - Sikaflex-521 FC - Transparent - 290 ml | For indoor and outdoor use, UV-stable and weather-resistant, elastic adhesive and sealant, good adhesion
SIKA - Adhesive and Sealant - Sikaflex-521 FC - Transparent - 290 ml | For indoor and outdoor use, UV-stable and weather-resistant, elastic adhesive and sealant, good adhesion
£15.29
Go to shop
Amazon-marketplace.co.uk
Delivery from £23.00
Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml (Pack of 2)
Sika Sikaflex 521 UV - Weathering Resistant Silane Terminated Polymer Adhesive Sealant - Age Resistant - Low Odour - Overpaintable - Black - 300ml (Pack of 2)
£31.16
Go to shop
amazon.co.uk
Free Delivery
3 x Sikaflex 521 UV Black 300 ml Polyurethane Hybrid Sealant
3 x Sikaflex 521 UV Black 300 ml Polyurethane Hybrid Sealant
£30.22
Go to shop
Amazon-marketplace.co.uk
Delivery from £23.00
Polyurethane Hybrid Sealant Flex 521 UV White 300 ml for Indoor and Outdoor Use
Polyurethane Hybrid Sealant Flex 521 UV White 300 ml for Indoor and Outdoor Use
£22.75
Go to shop
ebay.co.uk
Free Delivery

User reviews

Our reviews come from Trustami, a service that automatically collects, links, and verifies reviews from various sources such as Google, eBay, Amazon, and Trusted Shops. This gives users a transparent overview of a manufacturer's customer satisfaction.

4.6 out of 5 stars

922 Ratings
5 stars
741
4 stars
96
3 stars
29
2 stars
20
1 star
36
Amazon.de Customer

The product description "Sikaflex 521 UV ..... (old version - new: Sikaflex 522) unfortunately does not give the buyer a clear product identification. In the description, photos and videos the old version (Sikaflex 521 UV with metal cartridge) is shown, but the successor product Sikaflex 522 has a d…

via trustami

Amazon.nl Customer

This stuff is the best for doing custom headlight work on cars,had to replace the glass of my evo and had used the grey one before and now black so it doesn't show up around the edges. Had it clamped down for 3 days and its tight.

via trustami

Ebay.de Customer

Fantastic!

via trustami

Amazon.de Customer

What can I say, simply PERFECT, I've been using it for years.

via trustami

Don't forget your voucher code: