01
Wood wool layer
Long wood fibres bound with mineral cement. Non-flammable and sound-absorbing, with a tough, open-textured face that takes paint, plaster or an exposed finish and gives a firm base for fixings.
WELTISO Composite Acoustic and Fire Barrier Panel
Built against fire.Tuned for silence.
WELTISO is a two-layer sandwich panel: a mineral-bonded wood wool layer and a dense stone wool layer, joined in the factory with a special-formula non-flammable adhesive. One board does three jobs: it holds back fire, absorbs sound and stops heat loss. Designed and manufactured in Türkiye by Sagist Group.
01Wood wool layer
03Non-flammable adhesive
02Stone wool layer
Tested
120min
Fire resistance
Tested
1350°C
Thermal threshold
Tested
150kg/m³
Material density
Tested
90dB
Sound transmission loss
✓ Tested and certified values. Test reports and certificates (CE, EAC, SGS) are available on request.
01 · Panel anatomy
Two layers. One barrier.
WELTISO is a sandwich of two materials bonded into one panel. Both layers are non-flammable and both insulate against sound, so the panel protects against fire and noise from either side.
02
Stone wool layer
Dense volcanic-rock fibre at 150 kg/m³. Non-combustible up to 1350 °C and it does not drip, while its dense fibres absorb and block sound. Fire and acoustic protection in one layer.
03
Non-flammable adhesive
A special-formula, non-flammable adhesive joins the two layers under pressure in the factory. The bond line does not catch fire, and the panel arrives as one rigid board, ready to cut and install.
02 · Performance
Measured where it matters.
The chart shows the standard fire curve used in furnace tests (ISO 834 / EN 1363-1). WELTISO holds its barrier function for the full 120 minutes, while furnace temperature passes 1000 °C.
Standard fire curve vs. WELTISO fire rating
Fire
Both layers are non-flammable, so the panel resists fire from either side: 120-minute fire resistance and a 1350 °C thermal threshold. Built for fire walls, shafts and escape routes.
Sound
Both layers insulate against sound, whichever side the noise comes from: the wood wool absorbs echo and the dense stone wool blocks noise passing between rooms. Sound transmission loss: 90 dB.
Heat
Stone wool traps still air in millions of fibres, cutting heat loss in winter and heat gain in summer. Lower energy bills, steadier rooms.
Life
Mineral-bonded and moisture-tolerant. It does not rot, resists pests and keeps its shape for decades, inside or on protected facades.
03 · Applications
Where WELTISO goes to work.
A.01
Hotels & resorts
Quiet guest rooms, fire-separated corridors and plant rooms.
A.02
Hospitals & clinics
Compartment walls, operating theatres and patient floors.
A.03
Data centres
Fire compartments and noise control around cooling plant.
A.04
Factories & warehouses
Machine-hall acoustics and fire breaks between process zones.
A.05
Residential towers
Party walls, lift shafts and stair cores between apartments.
A.06
Offices & HQs
Meeting rooms, executive floors and open-plan sound control.
A.07
Schools & stadiums
Sports halls, auditoriums and safe evacuation routes.
A.08
Studios & cinemas
Recording rooms, screening halls and home cinemas.
04 · Technical data
Specification sheet.
| Parameter | Value |
|---|---|
| Product | WELTISO Composite Acoustic and Fire Barrier Panel |
| Composition | 2-layer sandwich: wood wool + stone wool, joined with special-formula non-flammable adhesive |
| Fire resistance (FR) | 120 minutes |
| Thermal threshold | 1350 °C |
| Material density | 150 kg/m³ |
| Acoustic insulation | 90 dB (transmission loss) |
| Certification class | EN 1364-2 · A1 / s1 |
| Country of origin | Türkiye — Made in Türkiye |
| Manufacturer | Sagist Group İnşaat Mobilya Dekorasyon Ltd. Şti. |
| Specification status | Tested and certified |
05 · The force behind the panel
Made by Sagist Group.
WELTISO is the building-materials brand of Sagist Group, the Istanbul turnkey contractor and manufacturer behind more than 1,000 international projects since 1996. The same engineering, factories and logistics that fit out hotels, hospitals and towers worldwide now make the panel inside their walls.
29+
years of manufacturing
1,000+
international projects
73
export countries
23
countries with active operations
M.01
Robotic precision
Robotic laser cutting and CNC systems cut every panel to drawing, so it arrives on site ready to fix.
M.02
Everything in-house
Engineering, production, quality control and site installation run under one roof and one responsibility.
M.03
Global logistics
Containerised, protected loads shipped door to door, with installation teams that travel with the order.
M.04
European production hub
A dedicated WELTISO panel plant is planned in Botevgrad, Bulgaria, to serve European projects faster.
06 · From drawing to wall
How a WELTISO project runs.
- 01
Brief
Send drawings and target fire, sound and heat values.
- 02
Engineer
We size thickness, layers and fixing details for your build.
- 03
Sample
Receive sample panels and the current test status.
- 04
Produce
Panels are cut to size on robotic and CNC lines.
- 05
Ship
Packed, labelled and shipped to your site worldwide.
- 06
Install
Our site teams install or supervise your contractor.
07 · Questions
Straight answers.
What is WELTISO?
WELTISO is a two-layer composite sandwich panel: a mineral-bonded wood wool layer joined to a stone wool layer with a special-formula non-flammable adhesive. It is used for fire barriers, acoustic treatment and thermal insulation in walls, ceilings and shafts. It is made in Türkiye by Sagist Group.
How long does WELTISO resist fire?
WELTISO resists fire for 120 minutes, with a thermal threshold of 1350 °C. Both layers are non-flammable, so this applies from either side. Test reports and certificates are available on request.
Is WELTISO good for soundproofing?
Yes. Both layers insulate against sound, from either side: the wood wool absorbs echo and the dense 150 kg/m³ stone wool blocks airborne noise. The tested sound transmission loss is 90 dB.
Where can WELTISO be used?
In hotels, hospitals, data centres, factories, residential towers, offices, schools, stadiums, studios and cinemas: anywhere that needs fire separation, quiet rooms or better insulation.
Who manufactures WELTISO?
Sagist Group İnşaat Mobilya Dekorasyon Ltd. Şti., Istanbul, Türkiye. Sagist Group has worked in manufacturing and turnkey contracting since 1996, with more than 1,000 international projects.
Do you ship WELTISO internationally?
Yes. Sagist Group exports to 73 countries and has active operations in 23. Panels are cut to size, packed in containers and shipped to your site, with installation support on request.
How do I get a price or a sample?
Send your drawings, quantities and target values by WhatsApp, phone or email. We reply with a technical proposal, a project price and sample panels.
What thickness should I choose?
Thickness depends on the fire rating, sound level and U-value you need. Our engineers size it for each project and confirm it in the technical proposal.
08 · Contact
Specify WELTISO for your next project.
Tell us the building, the fire rating and the sound level you need. Our engineers answer with a technical proposal and a project price.
Phone+90 553 720 66 17
WhatsAppwa.me/sagistgroup
Emailinfo@hotelmobilya.com
Head office & factory salesMareşal Fevzi Çakmak Cad. No: 116-118, Ferhatpaşa, Ataşehir, İstanbul, Türkiye