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🔧 Seal Smart, Seal Strong — Stay Ahead of the Weather!
Sika Flex 521 UV is a 300 ml white polyurethane hybrid sealant designed for professional-grade waterproofing and adhesion. It offers exceptional weather and aging resistance, bonds to a wide range of substrates including wood, metals, ceramics, and plastics, and is free from solvents, silicone, and PVC. Its flexible, paintable, and sandable formula ensures durable, elastic joints with high electrical resistance, making it the go-to choice for managers and pros demanding reliable, clean, and sustainable sealing solutions.
| ASIN | B00A9UK1TQ |
| Best Sellers Rank | 46,830 in Automotive ( See Top 100 in Automotive ) 326 in Fillers, Adhesives & Sealants |
| Brand | Sika |
| Customer Reviews | 4.6 4.6 out of 5 stars (6,678) |
| Date First Available | 19 Nov. 2012 |
| Item Weight | 420 g |
| Item model number | 54864 |
| Manufacturer | Sika |
| Manufacturer part number | 54864 |
| Model | Sikaflex-521 UV (Alt) |
| Product Dimensions | 4.9 x 4.9 x 22.5 cm; 420 g |
| Special Features | BIANCO |
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
F**S
Buen sellador las uniones me han quedado perfectas y fuertes, he conseguido impermeabilizar en el exterior con este producto fácilmente.
D**M
Très bon produit, je ne regrette pas d'avoir acheté,
S**E
Il n'est plus la peine de faire la publicité de Sika ! Cette marque est presque indispensable sur bon nombre de chantiers, qu'ils soient professionnels ou amateurs, et ce produit ne fait pas exception à la règle. ✅ Points Forts : • Réputation Confirmée : On achète Sika, on achète la tranquillité. La qualité est toujours au rendez-vous. • Facilité d'Application : Le produit s'extrude et se lisse très facilement (avec les outils adéquats, bien sûr !). Il a une bonne consistance, sans couler. • Double Rôle Parfait : Il colle bien et fait parfaitement son rôle de joint d'étanchéité (intempéries, humidité, etc.). • Adhérence : J'ai obtenu une très bonne adhérence sur mes supports (vous pouvez ajouter les supports si vous voulez, ex: bois, métal, béton). C'est un produit fiable que je valide sans hésitation. Si vous cherchez un colle-mastic polyvalent et durable, vous l'avez trouvé. Je recommande ce produit à 100% !
R**T
Snabb leverans och bra packat
K**A
On time