Insulate the wall /curtain wall towards your neighbors with our sound absorbers and benefit from:

  • an enhanced living quality in your home
  • a more relaxing atmosphere
  • protection against noise from inconsiderate neighbors
  • effective sound insulation of partition walls
  • diminished sound transmission through walls and ceiling
  • more peace and quiet in your home
Cartridge / Set of 6 or 12 cartridges: cartridge of 310 ml
Our soni SPECIAL ADHESIVE is an ideal adhesive for spot and full-surface fixation of sound-insulation materials and acoustic elements made of open-cell foam, especially melamine and PUR foams. The solvent-free, stable soni SPECIAL ADHESIVE provides excellent adherence to typical building materials, such as concrete, plaster, masonry, cement and wood. With the elastoplastic, single-component polymer adhesive, our open-cell foam panels can be glued directly to the wall or ceiling. Our soni SPECIAL ADHESIVE is available in 310-ml-cartridges, in sets of 6 or 12 cartridges. Please note: soni SPECIAL ADHESIVE is not suitable for PE foams such as soni RESIST. Keep out of reach of children!

Color: black | Thickness: 32 mm
soni COMPOSITE is a combination product made from our synthetic soni EVA heavy layer and an acoustic foam laminated with a decorative felt layer. This ideal combination ensures a twofold noise-control effect: sound absorption plus sound insulation – for especially high overall effectiveness in reducing the noise level. soni COMPOSITE is particularly suitable for sound-transmission insulation. Mounted on the wall towards the neighbor’s apartment or behind a so-called curtail wall, for instance, our two-layer acoustic product achieves a noticeable noise reduction. For individual design options, you have the choice of various felt colors. Using a carpet knife, you can cut soni COMPOSITE to the required size and shape. The self-adhesive equipment of the rear face serves primarily as an installation aid.

Content: 0.5 m² (€65.80* / 1 m²)

Set 1 / Set 2: Set 1 (for 25 to 30 mm material)
For the mechanical fixation of soundproofing material. Set 1 (for 25 to 32 mm thick material) consists of 20 nylon anchors 8x40, 20 screws 6x70/42 and 20 fixation disks. Set 2 (for 50 to 52 mm thick material) consists of 20 nylon anchors 8x40, 20 screws 6x90/56 and 20 fixation disks.

soni NBR sealing tape
soni NBR sealing tape is a closed-cell sealing material on the basis of NBR. A typical application of soni NBR is in the construction of a curtain wall, where it acoustically decouples the wooden lathing. Because of its suitability for contact with oils, e.g. engine oil, our sealing and decoupling tape has also proven to be an excellent solution for use in many technical areas as well as in vehicles, machines, enclosures, hoods and much more. Moreover, it is exceptionally hard-wearing and extremely resistant against deformation.  The self-adhesive rear face makes installation fast and easy. Roll length: 5 mThickness: 5 mmWidth: 40 mmHardness Shore 00: 31Tensile strength / ISO 1798: ≥ 205 kPa

Content: 5 m (€1.58* / 1 m)

soni PORTA
Effective and comfortable door insulation with soni PORTAEarsplittingly loud music from your teenager's room, bothersome noise from the hallway, loud phone conversations from the adjacent office, lack of discretion in treatment rooms - wherever closed doors are supposed to provide undisturbed quiet, our door insulation kit is the ideal solution for effective noise reduction.Our soni PORTA solution consists of six precision-fit elements that form an attractive pattern and are simply glued to the door with the help of the included installation aid and our easy-to-understand installation instructions. Thanks to our unique, protected self-adhesive solution, you can remove soni PORTA again from smooth surfaces without leaving any residue, if necessary, for instance when moving out.Elegantly shaped cutouts for the door handle, on the left or right as needed, complete the sophisticated design.Depending on the application, the material has to be mounted either on the inside or on the outside of the door. For this reason, soni PORTA has been designed in two standard heights. It is important to install the door insulation material always on the side of the noise source.soni PORTA is suitable for the sound insulation of any room door with rebate - in private homes as well as in day-care centers, kindergartens, schools, medical facilities, offices, hotels, banks, etc.The soni PORTA elements are made of a combination of two highly effective acoustic materials: a heavy layer and an acoustic foam layer. The heavy layer on the underside of soni PORTA is glued directly to the door leaf, increasing its mass and thus the overall sound insulation effect of the door. The visible side consists of an acoustic foam layer covered with an attractive felt material. The foam’s open cells absorb sound energy. The robust and dirt-repellent felt surface is available in 8 trendy colors. The edges of the elements can be masked with our soni VLD adhesive tape, if desired.For ordering the soundproofing set that fits your door, you will need the outer dimensions of the door leaf. Please measure the width and height of your door leaf on the outside, i.e. on the side in the direction in which your door opens.Please note: If the gap between the door leaf and the floor is too wide, we recommend mounting a door sweep or a door bottom seal. Only when all gaps and openings around the door are closed, perfect soundproofing is possible.

Our soni PROTECT R sound-insulation panel is a high-quality recycling product based on melamine resin. What makes soni PROTECT R so special is its excellent sound-absorption and sound-insulation capacity, which allows for effective sound-transmission prevention. When mounted in the empty space behind a curtain wall or false ceiling, soni PROTECT R minimizes the propagation of noise, vibration and resonances – for improved sound insulation of partitions, walls and ceilings. This puts an effective stop to the transmission of ambient noise or annoyingly loud sounds from neighboring apartments. Advice on building a curtain wall:For a curtain wall, dowel wooden laths of 30 or 50 mm thickness to the wall. Ideally, an elastic layer is placed between the wall and the laths to prevent sound bridges. Our soni NBR sealing tape is the ideal solution for such an elastic mounting. Then insert our sound-absorber product soni PROTECT R in the empty spaces between the laths and cover them with plaster boards or particle boards screwed to the laths. For even more effective sound absorption, soni PROTECT R can be mounted on the wooden laths (30 mm) instead of being applied directly on the wall. The resulting air gap acts as an extra sound insulation. To optimize the curtain wall you can "decouple" the plaster board / particle board from the floor and ceiling as well as the adjacent walls by filling the edge joints with acrylic.For an example of a curtain wall construction for noise insulation purposes, please see the testimonial "Neighbors / Curtain Walling”. 

Content: 0.5 m² (€39.80* / 1 m²)

soni VLC-01
Length of reel: 10 m | Width: 60 mm
Our soni ADHESIVE TAPES are ideal for masking edges, covering and protecting fragile surfaces as well as for concealing joints and cracks. They score with excellent adhesion on a variety of substrates. Thanks to their wide range of applications, our soni ADHESIVE TAPES have become a bestseller in professional and private contexts. Our soni VLC-01 ADHESIVE TAPE with black non-woven surface perfectly matches the visible face of our black soni DECOR and soni COMPOSITE acoustic panels. It is ideal for covering outer edges or masking joints. The integrated scrim reinforcement prevents stretching.

Content: 10 m (€1.79* / 1 m)



Effective sound insulations of walls between apartments

Noise from neighbors, echoing staircases or traffic noise may quickly ruin the comfort that you expect to find in your home. In the long run, such noise-related nuisances can become a psychological burden and even cause health disorders.

We at soniflex want you to feel comfortable in your home and will help you to put an end to noise pollution in your living environment. Our acoustic panels are ideal for the sound insulation of partition walls in old residential structures, terraced houses and apartment buildings. Placed behind a curtain wall or - if space is limited - mounted directly on the separating surface, our sound insulation panels reduce the sound transmission through walls and ceiling. This will provide you with the desired peace and quiet, and noticeably improve the acoustics in the rooms concerned.


Sound insulation of an apartment

A family reports:
We live in a multiple-family house built in 1920. The individual apartments are separated by ordinary, relatively thin walls that do not block off noises and voices, for instance people talking loudly or children shouting and crying. To remedy this situation, we decided to cover the partition walls with a sound insulation layer as part of a general refurbishment of our house.

The soniflex team recommended the construction of so-called curtain walling in front of the partition walls to block off the voices and other air-borne noises from the neighboring apartment. For such a curtain wall, a framework of 30 to 50 mm thick wooden slats is fixed to the wall, preferably on elastic spacers to ensure acoustic decoupling. Then soni PROTECT R sound insulation panels are mounted in the spaces between the slats. As a last step, plaster wallboards or particle boards are fixed on the slat framework with screws. An even better sound absorption effect is achieved when the sound protection material, here soni PROTECT R, is not fixed directly on the wall but to the wooden slats (30 mm) before mounting the wallboards.

For optimum overall effectiveness, the wallboards should be decoupled from the side walls, the ceiling and the floor by filling the gaps with acrylic putty.

Handling and cutting the soni PROTECT R sound proofing panels was totally easy and we had no trouble installing the curtain walling. For this we could rely on the detailed and sound advice provided by the very knowledgeable soniflex team. The result was just what we had hoped for: Now the sounds and noises from the neighboring apartment are virtually imperceptible on our side of the wall.

soni PROTECT R is a highly effective sound absorption material and offers higher sound insulation values than melamine foam alone. Used as sound absorber in the hollow space behind a curtain wall, soni PROTECT R achieves a considerable reduction of any resonances that might occur and thus improves the overall sound protection effect.

Sound insulation of a ceiling

Our customer reports: Our problem was the high noise level from the apartment on the next-higher floor. To fight this noise, we needed to replace the complete wood ceiling by a new, sound-proofing construction.

In old houses it is often very difficult to define the best solution because of the special construction and building materials used. Our traditionally built ceiling, for instance, was filled with straw and cinder.

We sent soniflex an email describing the problem. They answered promptly with an exact description of what the new ceiling construction should look like and a list of the materials needed.

We ordered soni PROTECT R acoustic panels and cartridges of soniflex special adhesive, which were delivered via DHL.

For the new ceiling construction we used wood laths (4.8 x 5.8 cm) fixed to the walls at both ends and to the ceiling beams at several intermediate points, wherever possible.

The question was how to ensure acoustic decoupling from the existing ceiling. And we had an idea: We simply cut some soni PROTECT R panels to fit the laths' width and inserted them between the new laths and the old ceiling. This was pretty easy to do and the best solution for preventing noise transmission.

Then the soni PROTECT R acoustic panels were glued between the laths on the old wood ceiling, using the special soniflex adhesive. The adhesive could be applied either in individual dots or in a zigzag pattern, as best fit the situation. Then plaster boards were fixed to the laths, the gaps filled with putty and the surface smoothed.

With the 5.8 cm thickness of the laths and the additional soniflex material between laths and old ceiling, there was a hollow space of 0.5 to 0.8 cm left between the soniflex material and the plaster board. According to soniflex, the air in this space acts as an additional insulation layer. We also followed the instructions of soniflex to leave a gap between the plaster boards and the wall and fill it with an acrylic sealing material for acoustic decoupling of the boards and the walls.

With the support of soniflex and of course their soni PROTECT R material, it was possible even for laypeople like us to achieve a very good sound protection result.

Sound-proofing a row house

A family from Hamburg (Germany) reports on their experiences with sound-proofing a semi-detached house:
The wall between our half of the house and our neighbors’ half is only about 20 to 25 cm (8 to 10 inches) thick and not sound-proofed. On one side of the wall is our living room, on the other side our neighbors’ bedroom. Already prior to moving into the house we realized that noise passed easily through the thin wall between the two house halves.

The customer consultants at soniflex suggested that we use curtain walling to sound-proof the partition wall.

Based on the in-depth advice provided by soniflex per e-mail, we ordered 10 m² (about 110 square feet) of soni COMPOSITE noise protection panels and glued these to wall, which we had smoothed out with smoothing compound beforehand. The self-adhesive on the panels’ rear face worked just perfectly! Then we used screws of a length of 6 cm (2.5 inch) to mount a framework of wooden slats over the sound insulation panels all along the wall. Then we fixed plaster wallboards on this framework, which made it possible to achieve an almost perfectly aligned curtain wall.

We smoothed out the installed wallboards with a suitable compound. The gaps at the outer edges were closed with white acrylic putty from the building supplies store. After a curing time of 24 hours, we applied another coat of smoothing compound to ensure a perfectly level substrate for the coat of paint. We are VERY pleased with the result.

1. This sound insulation measure proved just as effective as we had hoped. Thanks to the curtain walling and the sound absorber panels, noise transmission between the two parts of the house has been reduced to a minimum! Now we can sit and talk – or party – in our living room until late at night without interfering with our neighbors' sleep. With the sound-proofing panels installed, no noise gets through the wall anymore!

2. We are very pleased with the high quality of the sound insulation material, as well as with the soniflex team's in-depth advice, which was exactly tailored to our problem. As we could rely on skilled helpers, implementing the suggested sound-proofing measure was really easy.

Sound insulation of flat

Our customer reports:
The noise from the apartment next door was just too much, so we had to find a noise insulation solution. We live in a maisonette that shares a wall made from limestone bricks with the maisonette next door. The building dates from 1987. Even though limestone is supposed to dampen sound, noise from various sources (radio/TV, telephone and general conversations, walking) in our neighbor’s apartment could be heard loudly through the wall. This noise problem was also perceived by our visitors.

The design of the building, especially the position of the spiral stair leading to the second floor, restricted the overall thickness of the sound-insulation curtain wall to a mere 50 mm. This led to our choice of 32-mm thick soni COMPOSITE inserted between 28-mm wood laths, on which plaster boards (2600 x 600 x 12.5 mm) were fixed with drive screws. On both the wall and the plaster board sides, the faces of the wood slats were covered with sealing tape to minimize sound transmission.

The sound-insulation panels were very easy to cut to the right shape and glue into the compartments between the laths. As the total thickness of the wood laths plus the sealing tape on both sides was 30 mm, there was no gap between the plaster board and the acoustic foam and the overall thickness was even below the maximum thickness of 50 mm.

This measure now largely eliminates any normal noises such as walking or radio/TV and also dampens the peak noises, such as a very shrill voice, to a tolerable level. 52-mm panels would probably have led to even better results, but in any case our apartment is so much quieter now than before!

Sound insulation of a bedroom wall against noise from the neighboring apartment.

A client tells us:
In my bedroom, I was often bothered by the noise from my neighbors’ living room, for example the sound of voices, the television, music or laughter. As I live in a rental apartment and my bedroom is quite small, the construction of curtain wall for sound proofing the partition wall as recommended by soniflex seemed too expensive a measure. The curtain walling would also have taken up too much of the limited space. This is why I decided in favor of the simpler alternative of fixing soni COMPOSITE 52-mm sound protection panels directly to the wall surface. As a large wardrobe was to be put right in front of the wall in question, covering it almost in its entirety, fixing the sound protection panels with adhesive was perfectly sufficient and I didn’t even need to fix the panels mechanically or cover them with plaster wallboards, as recommended by soniflex for such applications in general. The wardrobe not only ensures that the sound protection panels will not come loose, but also provides additional sound insulation.

In combination with the wardrobe, the soni COMPOSITE sound protection panels fixed directly on the wall proved to be the right solution for the protection of my bedroom against the noises from the neighboring apartment, which are virtually imperceptible now. I am absolutely satisfied with the result. And, what is more, it was really easy to install the sound protection panels.

Sound proofing of an unused interior door

One client used soniflex material for sound-proofing an interior door. Here’s his report:
I used soni PROTECT R 50 mm sound protection panels to acoustically insulate an unused door in our rental apartment. The objective was to reduce the amount of noise transmitted from the kitchen on one side of the door to the bedroom on the other side. As we live in a historic building and it's a rental anyway, we needed a sound protection material that would be easy to install and remove without damaging the door or the door frame.

So I decided to cover the door with a double layer of soni PROTECT R noise reduction panels wedged in the door frame. To do this, I prepared two panels of slightly larger dimensions than the door frame and glued them together using soniflex special adhesive. Then I simply pushed the double layer into the door frame. The noise protection panels are easy to cut with a carpet knife. The entire sound-proofing project took hardly any time at all. And the result was so much better than expected: The door is now totally sound-proof. To hide the door and the sound insulation material, we simply placed a cupboard in front of it.

I am totally satisfied with the noise protection material and the result. And I really appreciated the help of the very knowledgeable and friendly soniflex consultants, who provided me with great advice on the phone. Such excellent customer service is rare these days. Thank you.

Sound proofing of a door

One client told us about his door sound-proofing project:
The problem: The door of the home cinema / music room in the basement of an apartment building needed to be sound-proofed to protect the neighbors.

The solution: A layer of 32-mm thick soni COMPOSITE sound-proofing panels glued on the door leaf in conjunction with additional sealing tape applied between door leaf and door frame, as recommended by soniflex, produced a very good sound-proofing result. Now I can enjoy watching movies in my home cinema without any danger of annoying my neighbors - they don’t hear a thing anymore.

The edges of the sound-proofing panels are cut with extreme precision so that there is no need to cover or hide the joints: The surface looks seamless as is. And I was even able to do without the additional mechanical fixation recommended by soniflex, the self-adhesive backing of the panels was sufficient. I just cleaned the door surface with a general household cleaner before applying the panels, that was all.