is there supposed to be a Caulk Nozzles with this item.

Mine didn't have any, can buy packs of five nozzles from wickes or similar shops...

Whats the expiry date of this product

This is dependant on the batch purchased, details will be present on the tube

Which product is best for bonding in windows on steel narrow boat?

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.

Is this suitable to glue a solar panel to camper van roof

Unfortunately the Sikaflex 521UV would not be suitable

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Sika Sikaflex 521 UV STP Adhesive Sealant, Black, 300ml

Product ID: 57255900

Details

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

⏳Cures in ~30 mins

🌦️Weather & age resistant

🖌️Paintable & sandable finish

172.56 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

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Description

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

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.

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.

Specifications

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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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172.56 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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