11 May 2026
Construction and Insulation Industry Meets Future Technologies at the TurkeyBuild Fair
The TurkeyBuild Fair in Istanbul brought together leading construction and insulation companies and opened up new busine...
For your buildings Waterproofing
Produced with modern technology
Flawless quality production
A trusted brand across Turkey
International production standards
On-time and complete delivery
Wide supply network
25 years of experience
Years of experience
Product categories
A complete product family for waterproofing
Gün Polimax Membrane
Gün Polimax Membrane by İZOPOLY YALITIM is a professional bituminous membrane en...
Gün Zirve Bituminous Waterproofing Membrane Series
The Gün Zirve Membrane Series by İZOPOLY YALITIM is a range of high-performance...
Gün Dinamik Membrane Series
The Gün Dinamik Membrane Series is a professional bituminous membrane solution e...
Gün Favori Membrane
Gün Favori Membrane is a bituminous waterproofing membrane developed to give lon...
Günproof Membrane
The Günproof Membrane Series is a range of high-strength bituminous membranes de...
Poliproof Membrane
The Poliproof Membrane Series is a professional range of bituminous membranes de...
ISO 9001International quality standard
Production & Insulation Technologies
İzopoly Yalıtım – Gün Membran: Reliable Waterproofing Solutions Across Türkiye
The Name of Trust in Insulation: İzopoly Yalıtım
At İzopoly Yalıtım, we combine our deep experience in the construction sector with an advanced production infrastructure to deliver high-performance, long-lasting insulation solutions across Türkiye. Guided by the principles of quality, trust and sustainability, we develop innovative and economical solutions tailored to the needs of every project.
Our Brands
We lead the sector with our own brands
With our own brands Gün Membran, Poliproof, Polimax, Oscar and Polydrain (drainage sheet), we take an approach that sets the direction in waterproofing. Our products withstand changing climate conditions, harsh environmental effects and heavy structural loads; they extend the life of buildings while minimizing maintenance costs, giving investors long-term advantages.
- Gün Membran
- Poliproof
- Polimax
- Oscar
- Polydrain drainage sheet
7 Million m²
Annual drainage sheet capacity
6.5 Million m²
Annual bitumen membrane capacity
ISO 9001
International quality standard
Our annual production capacity is approximately 7 million square meters for drainage sheets and approximately 6.5 million square meters for bitumen membranes. Thanks to meticulous quality control processes carried out in line with international standards in our modern production facilities, our products are assured at every stage.
Performance
Lasting performance from foundation to roof
High elasticity
Superior waterproofing
Strong heat resistance
Our bitumen membrane solutions, with high elasticity, superior waterproofing and strong heat resistance, cover a wide range of applications from foundation to roof and are trusted by professionals.
Logistics & Support
On-time delivery across Türkiye
We are not just a company that manufactures products; we are a partner that adds value to our business partners with reliable and sustainable solutions. With our strong logistics infrastructure and wide distribution network, we serve projects all over Türkiye on time, in full and without interruption. With our pre-sales and after-sales technical support, we stand by our customers at every stage.
Pre- and after-sales technical support
Vision
Our Goal
As a brand that closely follows developments in the sector, values R&D investment and constantly renews itself, we aim to take our quality standards further every day. Our goal is to make all our brands, above all Gün Membran, leading brands known for trust and quality not only in Türkiye but also in the international market.
At İzopoly Yalıtım, we continue with determination to create value for safe buildings built on solid foundations and to lead the sector.
ISO 9001
Our Mission
Our mission at İzopoly Yalıtım is to add value to the sector by developing high-quality and reliable insulation solutions that increase the durability and lifespan of buildings. While producing products that deliver superior waterproofing performance with our modern production technologies and strong R&D infrastructure, we always put customer satisfaction first.
- We produce quality products – we are fully committed to the international production standard ISO 9001.
Certificate
Our company holds the DIN EN ISO 9001:2008 certificate, which confirms that membrane production and supply are carried out in accordance with the requirements of the international standard.
Why İzopoly?
What sets us apart
Trusted expertise
With our experience and technical know-how we bring projects the right product, the right solution and dependable support.
Innovative solutions
Our modern production approach yields long-lasting waterproofing systems for foundations, roofs, terraces and industrial buildings.
Quality assurance
Every product passes quality control so that it delivers high water tightness, durability and performance.
Fast and reliable delivery
Our strong logistics network supplies projects across Turkey on time and in full.
Get a quote for your project
Talk to our technical team about our products and applications.
Company news
News
11 May 2026
İZOPOLY YALITIM Delivers Insulation Solutions Across Turkey with High Production Capacity
With modern production facilities, a broad product range and a strong logistics network, İZOPOLY YALITIM meets waterproo...
11 May 2026
Professional Waterproofing from Foundation to Roof with Gün Membran Products
In construction, waterproofing is critical to a building's durability and service life. With the Gün Membran brand, İZOP...
