# WELTISO Composite Acoustic and Fire Barrier Panel > WELTISO Composite Acoustic and Fire Barrier Panel by Sagist Group (Istanbul, Türkiye). 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. ## Key facts - Official product name: WELTISO Composite Acoustic and Fire Barrier Panel - Construction: 2-layer sandwich panel: mineral-bonded wood wool layer + stone wool layer, joined with a special-formula non-flammable adhesive - Uses: fire barriers, acoustic treatment, thermal insulation in walls, ceilings and shafts - Fire resistance: 120 minutes, from either side (tested) - Thermal threshold: 1350 °C - Material density: 150 kg/m³ - Acoustic insulation: 90 dB transmission loss, from either side (tested) - Both layers are non-flammable and both insulate against sound - Certification class: EN 1364-2 A1 / s1 - Certifications: CE marking, EAC, SGS test report (documents available on request) - Status: tested and certified - Country of origin: Türkiye (Made in Türkiye); a European panel plant is planned in Botevgrad, Bulgaria - Manufacturer: Sagist Group İnşaat Mobilya Dekorasyon Ltd. Şti., Mareşal Fevzi Çakmak Cad. No: 116-118, Ferhatpaşa, Ataşehir, İstanbul, Türkiye - Sagist Group: founded 1996, 29+ years, 1,000+ international projects, exports to 73 countries, active operations in 23 countries; robotic laser cutting and CNC production; turnkey contracting - Contact: +90 553 720 66 17 · WhatsApp https://wa.me/sagistgroup · info@hotelmobilya.com ## FAQ ### 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. ## Pages - [English](https://www.weltiso.com/) - [Türkçe](https://www.weltiso.com/tr.html) - [Deutsch](https://www.weltiso.com/de.html) - [Français](https://www.weltiso.com/fr.html) - [Español](https://www.weltiso.com/es.html) - [Italiano](https://www.weltiso.com/it.html) - [Português](https://www.weltiso.com/pt.html) - [Nederlands](https://www.weltiso.com/nl.html) - [Русский](https://www.weltiso.com/ru.html) - [Українська](https://www.weltiso.com/uk.html) - [Български](https://www.weltiso.com/bg.html) - [Polski](https://www.weltiso.com/pl.html) - [Română](https://www.weltiso.com/ro.html) - [Ελληνικά](https://www.weltiso.com/el.html) - [Hrvatski](https://www.weltiso.com/hr.html) - [Shqip](https://www.weltiso.com/sq.html) - [Dansk](https://www.weltiso.com/da.html) - [Svenska](https://www.weltiso.com/sv.html) - [Norsk](https://www.weltiso.com/no.html) - [Suomi](https://www.weltiso.com/fi.html) - [Lëtzebuergesch](https://www.weltiso.com/lb.html) - [ქართული](https://www.weltiso.com/ka.html) - [Azərbaycanca](https://www.weltiso.com/az.html) - [Қазақша](https://www.weltiso.com/kk.html) - [Oʻzbekcha](https://www.weltiso.com/uz.html) - [Türkmençe](https://www.weltiso.com/tk.html) - [العربية](https://www.weltiso.com/ar.html) - [فارسی](https://www.weltiso.com/fa.html) - [עברית](https://www.weltiso.com/he.html) - [اردو](https://www.weltiso.com/ur.html) - [کوردی](https://www.weltiso.com/ku.html) - [हिन्दी](https://www.weltiso.com/hi.html) - [简体中文](https://www.weltiso.com/zh.html) - [日本語](https://www.weltiso.com/ja.html) - [한국어](https://www.weltiso.com/ko.html) - [Bahasa Indonesia](https://www.weltiso.com/id.html) - [Bahasa Melayu](https://www.weltiso.com/ms.html) - [Kiswahili](https://www.weltiso.com/sw.html) - [አማርኛ](https://www.weltiso.com/am.html) - [Hausa](https://www.weltiso.com/ha.html) - [Yorùbá](https://www.weltiso.com/yo.html) - [isiZulu](https://www.weltiso.com/zu.html) ## Sagist Group - [Sagist Group – hotelmobilya.com](https://www.hotelmobilya.com) - [Hotel furniture](https://www.hotelmobilya.com/hotelfurniture) - [Home & villa furniture](https://www.hotelmobilya.com/homefurniture) - [Restaurant furniture](https://www.hotelmobilya.com/restaurantfurniture) - [Office furniture](https://www.hotelmobilya.com/officefurniture)