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Everbuild Everflex AC50 is a 380ml white acrylic sealant and adhesive engineered for professional-grade acoustic sealing and bonding. It offers permanent flexibility, high grab adhesion to multiple surfaces, mould resistance, and fire safety through an intumescent barrier. Over-paintable and easy to clean, it’s ideal for sealing gaps in plasterboard walls, floors, and ceilings, enhancing both soundproofing and structural integrity.







| ASIN | B0012RLYJ6 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 5,423 in DIY & Tools ( See Top 100 in DIY & Tools ) 123 in Sealers |
| Colour | White |
| Customer Reviews | 4.2 4.2 out of 5 stars (504) |
| Date First Available | 1 Jan. 2007 |
| Included Components | 1 x cartridge |
| Item Package Quantity | 1 |
| Item Weight | 640 g |
| Item model number | AC50C4 |
| Manufacturer | Sika Everbuild |
| Material | Acrylic |
| Part Number | AC50C4 |
| Product Dimensions | 3.2 x 3.81 x 25.4 cm; 639.56 g |
| Size | 380ml |
| Style | Compact |
A**R
Good stuff 👏
I had some hesitation because other reviewers said it didn't fit in a culking gun - they do in fact fit in a normal size skeleton/caulking gun. Someone else mentioned not getting nozzles, i got 3 nozzles with 3 tubes as expected. The sealant itself was easy to use when sealing round insulated plasterboard. I also used it as frame sealant around the window/plasterboard joints and round sill. Tooled off and cured really nicely. Between this sealant and insulated plasterboard the room is warmer and a little quieter. Will use again
A**R
A good priced product and met with my expectations
A good item which did the job just what I expected.
S**Y
Good
Now my windows are quiet and less drafty
J**X
You'll probably need more!
I used it to assist in the construction of a 'soundproof' room. Easy to use and smooth down before it cures. Although waterbased? product can irritate sensitive skin. Worked great for sealing uneven joints between walls, ceilings and studwork. Coverage is fair though I found I needed more than was estimated for to complete the job. Can be used as an adhesive to attach plasterboard to fixings though I didn't use it for load bearing areas. Mainly used to seal joints between boards before taping and finishing. Can be easily painted over. Says you can 'sand it down' you can but very time consuming! More than happy to recommend this product and I would buy it again for a similar project/job.
P**E
Acoustic sealant
Nice and fluid to use not too thick like others I have used
S**S
Did the job
This doesn't fit the standard size gun so be aware of that. I had to cut mine down to fit in my caulking gun. It adhered well and was easy to spread and fill the edges of the area I'm trying to reduce excess sound. It doesn't last very long and the nozzles it comes with seem to "waste" a large amount of filler in the tube.
M**H
Curing is too delayed
Not as great as its states, settling time is too long in winter. I have applied day before and its still not set
D**L
Wow
So I bought this with little expectations, as the gap around my window was minor so didn't expect much of a change.. after using it, it has changed the room. Quieter, warmer and sticks just like caulk, easy to use and can be painted over- worth every penny. Really good stuff!
M**L
Lo compre sabiendo lo que era. Cumple con su función.Lo utilice para sellar marcos de ventanas que venían sin sellar de obra.
Trustpilot
1 month ago
3 days ago