🛡️ Seal smart, seal strong — the pro’s choice for flawless finishes!
Sika Flex 521 UV is a 300 ml white polyurethane hybrid sealant designed for multi-purpose use. It offers superior weather and UV resistance, adheres to a wide range of materials including wood, metals, ceramics, and plastics, and features high elasticity and electrical resistance. Solvent, silicone, and PVC-free, it can be painted and sanded, making it ideal for professional-grade sealing and bonding applications.
| Manufacturer | Sika |
| Brand | Sika |
| Model | Sikaflex-521 UV (Alt) |
| Product Dimensions | 4.9 x 4.9 x 22.5 cm; 420 g |
| Item model number | 54864 |
| Manufacturer part number | 54864 |
| Special Features | BIANCO |
| Item Weight | 420 g |
M**L
Needed it fast.
Needed this specific product for a client task. As always the main criteria was getting the item quick as this was a urgent task.Delivery was quick and well packaged. The product worked well but as this product was a requirement by the customer I don't think it's fair to compare it to other products. It has remained flexible and provided a weatherproof seal on the component.
K**N
Brilliant stuff very strong joint.
Easy to use, full size solar panel fitted to the caravan glued in 6 positions very strong joints fitted Saturday morning could not move it Sunday morning, no holes required in the caravan roof.
M**T
Solar panals glue
Great stuff used to glue solar panals on my van
L**N
Best sealant on the market
Use this before on our caravan would highly recommend
G**N
Sikaflex
Perfect for the job putting solar on campervan roof
S**E
Good sealant for motorhome, and general outdoor settings
Great sealant for motorhome
P**P
keep out the damp
Not tried this batch but last lot very good
A**R
Yes
Excellent
Trustpilot
5 days ago
2 weeks ago
