Sika Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml

Sika Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml

Q: Whats the expiry date of this product

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?

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

Unfortunately the Sikaflex 521UV would not be suitable

Product ID: 57255900

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Details

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

🎨Paintable & sandable after curing

🌦️Superior weather & ageing resistance

🛠️300ml professional-grade cartridge

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Sika Sikaflex 521 UV – Weathering Resistant STP Adhesive Sealant – Multipurpose – Low Odour – Age And Weather Resistant – Light Grey – 300ml

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Sika Sikaflex-522 Caravan And Motorhome Adhesive Sealant – Weather And Mould Resistant – White – 300ml

Description

🛡️ Seal the deal with weatherproof confidence!

SAFE ADAPTABLE - Solvent-free, isocyanate-based sealant that’s paintable and sandable for seamless finishes.
UNMATCHED DURABILITY - Flexible polymer formula ensures bonds that last through any weather.
EFFORTLESS APPLICATION - Compatible with hand, pneumatic, or electric piston guns for professional precision.
INDOOR OUTDOOR READY - Perfect for both interior and exterior applications with long-lasting protection.
VERSATILE BONDING POWER - Bonds timber, metals, ceramics, plastics—no primer needed.

Sika Sikaflex 521 UV is a professional-grade, multipurpose STP adhesive sealant in a 300ml cartridge. Its flexible polyurethane formula offers exceptional resistance to ageing and weathering, making it ideal for durable bonds on timber, metals, ceramics, and plastics without priming. Solvent-free and paintable, it suits both interior and exterior use, applied easily with various piston guns. Available in light grey, it delivers long-lasting, low-odour performance trusted by professionals.

Specifications

Manufacturer	Sika
Part number	62139
Item Weight	300 g
Product Dimensions	5 x 5 x 21 cm; 300 g
Item model number	512UV
Size	300ml
Colour	Grau
Style	single
Material	Polyurethane Silicone silicone Polyvinyl chloride
Volume	300 Millilitres
Item Package Quantity	1
Number of Pieces	1
Measurement System	Metric
Specific uses	Professional
Included components	1 cartridge
Batteries included?	No
Batteries Required?	No

Have a Question? See What Others Asked

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

Whats the expiry date of this product

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

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

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