Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml

Sikaflex 521 Uv New White Sealant 300 Ml Cartridge Sikaflex 521B310

4.7 (296)

Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml

Overall Rating: 4.2 / 5 (average from multiple review sources, as of 18 Oct 2026)
Based on a total of 26,737 customer reviews from independent review platforms.

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

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Notice:
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Cheapest Total Price
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£17.39
£57.97 / l
Free Delivery

Sikaflex 521 Uv New White Sealant 300 Ml Cartridge Sikaflex 521B310

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 - 10 working days of receiving cleared payment.
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£18.59
Delivery from £16.68
Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml

Cheapest offer

Solvent-free, silicone-free and PVC-free sealant and adhesive SUSTAINABILITY: Weather and aging resistant SUPPORTS: Adheres to a variety of substrates such as wood, metals, primed and painted metals (bicomponent systems), ceramic materials and plastics Can be painted and can be sanded Elastic and high electrical resistance; It is used by experienced professionals
£17.39
In stock
Amazon-marketplace.co.uk

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Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml - Details

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We have found 2 prices for Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml. Our price list is completely transparent with the cheapest listed first. Additional delivery costs may apply.

Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml - Price Information

  • Cheapest price: £17.39
  • The cheapest price is offered by Amazon-marketplace.co.uk. You can order the product there.
  • The price range for Sika Flex 521 UV, White, Polyurethane Hybrid Multi-Purpose Sealant, Adhesive Sealant for Sealing and Elastic Joints, Weatherproof, 300 ml is £17.39 to £18.59, with a total of 2 offers.
  • Payment methods: The online shop Amazon-marketplace.co.uk supports: Direct debit, Mastercard, Visa
  • Delivery: The shortest delivery time is In stock working days offered by Amazon-marketplace.co.uk.

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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.

4.7 out of 5 stars

296 Ratings
5 stars
254
4 stars
25
3 stars
8
2 stars
2
1 star
7
Amazon.fr Customer

Very good product from a reputable brand, perfect for resealing a camper van window. The application is simple and, if closed correctly, the cartridge does not dry from the inside and can be reused several weeks later. I still recommend using a special rubber squeegee to create a clean, smooth seal;…

via trustami

Amazon.co.uk Customer

Does what it says on the tin

via trustami

Amazon.it Customer

I bought Sikaflex 521 UV for some maintenance work on my camper and I must say it is a product of excellent quality. The consistency is just right: sufficiently elastic to follow the movements of surfaces, yet still very durable once it dries. I used it to seal joints, profiles and small points wher…

via trustami

Amazon.co.uk Customer

Done the job easily

via trustami

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