






๐ก๏ธ Seal smart, live quiet โ the proโs choice for flawless finishes!
Everbuild Everflex AC50 is a 380 ml white acrylic sealant and adhesive designed for professional acoustic and fire barrier applications. It offers permanent flexibility, high adhesion to multiple surfaces, mould resistance, and is non-flammable. Overpaintable and easy to clean, it forms a durable seal that reduces noise and enhances fire safety in walls, floors, and ceilings. Compatible with standard caulking guns, itโs a trusted solution for contractors seeking reliable, high-performance sealing.







| ASIN | B0012RLYJ6 |
| Best Sellers Rank | 7,923 in DIY & Tools ( See Top 100 in DIY & Tools ) 186 in Sealers |
| Brand | Sika |
| Colour | White |
| Compatible Material | Plasterboard, Kraft Lined Insulation Boards, Common Substrates, Most Surfaces |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.3 out of 5 stars 516 Reviews |
| Global Trade Identification Number | 05029347600358, 05029347903268 |
| Item Dimensions | 32 x 38 x 254 millimetres |
| Item Form | Paste |
| Item Weight | 0.64 Kilograms |
| Item dimensions L x W x H | 32 x 38 x 254 millimetres |
| Item weight | 0.64 Kilograms |
| Manufacturer | Sika Everbuild |
| Manufacturer Contact Information | Sika Everbuild 41 Knowsthorpe Way, Leeds LS9 0SW |
| Manufacturer Part Number | AC50C4 |
| Material | Acrylic |
| Model Number | AC50C4 |
| Number of Items | 12 |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Wall |
| Unit Count | 380.0 millilitre |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |
A**R
Good stuff ๐
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.
M**4
Best sealant on the market
Great sealant
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.
S**Y
Good
Now my windows are quiet and less drafty
S**F
False advertisement
As they say Buy nice or Buy twice! In my case I literally ordered twice thinking this was the best sealant for the window glass caulking and wall corners let alone the bathroom. It worked ok on the wall joints and corners and because it descripted its moist proof and fungus proof I used the last bottle on windows. I was happy with the quantity each bottle had and the way it adhered on glass and wood. When the winters starts and this time of the year is disaster for my windows as they are not glazed, the vapours sits on the glass and drips down the ledges which makes the paint go manky and later turns into fungus, this time I thought I was sorted as I have used this product inside and out of the windows and even ordered the second time to make sure the sealant is generously used. I even made sure to paint over for extra protection just in case. But it failed me, the sealant is coming off, it is so bad that I am scared of cleaning the window as it stains the glass it let water to b collected more and stains my cleaning cloth. The pink yucky fungus is still there and along with that the black fungus is sitting literally on the sealant and nowhere else. Never Ever!
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.
P**E
Acoustic sealant
Nice and fluid to use not too thick like others I have used
Trustpilot
1 month ago
1 month ago