SBR Rubber Acoustic Insulation for Construction | Spray Walls and Decoupled Floor Screed | Building Insulation
Building Insulation is Prismi’s range of SBR rubber granules for acoustic soundproofing in building construction, manufactured in Italy since 1990. The system includes two distinct products for complementary applications — walls and floors — both formulated to be combined with cement or sand-cement on site, achieving high fire resistance in the finished structure.
Wallsafe 0515 (particle size 0.5–1.5 mm): SBR rubber granule applied by mechanical spray with cement mortar for acoustic isolation of partition walls. Mixed with water and cement, it is sprayed directly onto the wall surface like conventional render, sealing all cavities and surface irregularities on any substrate: brick, aerated concrete, concrete block, cast concrete, plasterboard, metal, plastic and glass.
Floorsafe 1035 (particle size 1.0–3.5 mm): SBR rubber granule for the construction of a decoupling floor screed to reduce impact noise from footfall. Mixed with sand and cement, it forms an elastically damping layer integrated into the screed in a single pass, without joints, conforming perfectly to any surface irregularity.
Both products are produced from pre-consumer non-recycled-tyre rubber, ensuring high material purity and consistent acoustic performance. The production technology derives from the design of tyre recycling systems by a related company.
Specifiers, contractors and installers: contact us to receive full technical data sheets and a quote for your project.
Reference project | rubber acoustic insulation in L'Aquila post-earthquake reconstruction, 2009
Prismi Building Insulation granules were supplied for the post-earthquake reconstruction works in L’Aquila in 2009, deployed as an integrated acoustic insulation system in the walls and floor slabs of residential buildings.
The images show the site storage, delivery and installation phases. This project represents one of the most technically demanding applications of this system carried out in Italy to date.
Building Insulation range | products for walls and floors
Floorsafe 1035 | decoupling floor screed for impact noise reduction
Floorsafe 1035 is Prismi’s vulcanized SBR rubber granule for the in-situ construction of a decoupling floor screed to reduce impact noise from footfall.
The 1.0–3.5 mm particle size is blended with sand and cement to form an elastically damping layer integrated into the floor screed in a single pass, without joints of any kind, in full adhesion to the laying surface.
It conforms to all surface irregularities including raised service channels, eliminating voids between the screed and the substrate that conventional systems require additional joints to address. Suitable for indoor and outdoor floors, balconies and terraces. High fire resistance after setting in sand-cement mix. Non post-consumer origin. Technical data sheet available.
Wallsafe 0515 | spray-applied acoustic insulation for partition walls
Wallsafe 0515 is Prismi’s vulcanized SBR rubber granule for the acoustic insulation of vertical partitions, applied by mechanical spray with cement mortar.
The fine 0.5–1.5 mm particle size enables the product to seal all cavities in partition walls and cover all surface irregularities, ensuring full adhesion to brick, aerated concrete, concrete block, cast concrete, plasterboard, metal, plastic and glass.
Wallsafe can be applied at ceiling level and to all lateral sound transmission points such as drainage stacks, plant rooms and service ducts, significantly reducing flanking transmission. It can also be injected into existing hollow double-wall cavities or applied to old walls by mechanical spray prior to new cladding. High fire resistance after setting in cement. Non post-consumer origin. Technical data sheet available.
Have a project requiring acoustic soundproofing on walls or floors?
Contact us to receive full Wallsafe 0515 and Floorsafe 1035 data sheets, a surface quantity calculation and a direct-from-manufacturer quote.
Rubber acoustic insulation rolls | soundproof-rubber-rolls.com
In addition to Building Insulation granules, Prismi also manufactures rubber rolls for acoustic insulation: sound-absorbing mat products for installation on floors, walls and ceilings, with excellent vibration damping and acoustic insulation properties. Discover the full range of rubber insulation rolls at soundproof-rubber-rolls.com — the dedicated Prismi website for rubber rolls and sheets for construction.
Frequently asked questions about Building Insulation rubber acoustic granules
What is the difference between Wallsafe 0515 and Floorsafe 1035?
The two Building Insulation products have complementary applications. Wallsafe 0515 (0.5–1.5 mm particle size) is formulated for acoustic insulation of vertical partitions: it is spray-applied with water and cement directly onto walls, exactly like conventional render. Floorsafe 1035 (1.0–3.5 mm particle size) is formulated for impact noise reduction from footfall: it is blended with sand and cement and laid as the floor screed or sub-screed. Both products, once set within their respective cement binders, develop high fire resistance in the finished construction.
What substrates is Wallsafe 0515 compatible with?
Wallsafe 0515 delivers full adhesion to any structural substrate: brick, aerated concrete (Ytong / gasbeton), concrete block, cast in-situ concrete, plasterboard, metal, plastic and glass. The fine 0.5–1.5 mm granulometry seals all cavities in vertical partitions and covers all surface irregularities, ensuring maximum adhesion even on uneven or textured wall faces. It is applicable at ceiling level and at all critical flanking transmission points: drainage stacks, plant rooms and service ducts. It can be injected into existing hollow double-wall cavities or applied to old walls by mechanical spray before new dry-lining or plasterboard cladding.
How does Floorsafe 1035 reduce impact noise from footfall?
Floorsafe 1035 creates a decoupling screed in a single pass: SBR granules (1.0–3.5 mm), once blended with sand and cement, form an elastically damping layer between the structural slab and the finished floor surface. This layer absorbs and dissipates the impact energy from footsteps before it can be transmitted into the structural slab, significantly reducing the impact noise perceived in the room below. The system conforms perfectly to any surface irregularity on the laying surface, including the presence of raised service channels, eliminating the void between screed and substrate that would otherwise require additional joints. Suitable for internal and external floors, balconies and terraces.
Do Building Insulation granules have high fire resistance?
Yes. One of the most important technical properties of Wallsafe and Floorsafe granules is the high fire resistance they develop after being encapsulated in their cement binder (Wallsafe) or sand-cement mix (Floorsafe). Once in place, the cement matrix surrounding the SBR granules acts as a thermal barrier, giving the composite material fire resistance properties that significantly exceed those of the rubber granule alone. This makes Building Insulation products suitable for use in residential and civil buildings where fire protection regulations impose fire resistance requirements for partition walls and floor slabs.
Do Building Insulation granules come from recycled post-consumer tyres?
No. Wallsafe 0515 and Floorsafe 1035 granules are produced from pre-consumer SBR rubber from industrial production waste — not from recycled post-consumer tyres (ELT). This guarantees high material purity, freedom from contaminants and consistent acoustic performance over time. The production technology derives from tyre recycling system design developed by a related company of Prismi. The products are manufactured at Prismi’s plant in Monteprandone (Ascoli Piceno, Italy), in operation since 1990, as documented by the supply for the L’Aquila earthquake reconstruction project in 2009.