Homogeneous TPO Waterproof Membrane | Type H Fully Homogeneous, Heat-weldable Single-ply Roofing Waterproof Material
1. Product Overview
Type H Homogeneous TPO Waterproof Membrane is produced in accordance with GB 27789-2011 national standard and ASTM D6878 international standard, suitable for both domestic projects and overseas export orders. Adopting integrated extrusion and calendering production technology, it is formulated with high-grade PP resin and EPDM rubber, paired with imported UV stabilizers and anti-oxidants to sustain stable structural performance during long-term outdoor service.
This membrane adopts a pure homogeneous integral structure, with no fiber reinforcement layer or non-woven fabric backing. Free of halogens and migratory plasticizers, the recyclable material combines the flexible, weather-resistant properties of rubber with the hot-air weldable advantages of thermoplastic materials. Tailored for exposed single-ply roofing systems, it excels in the waterproofing of complex structural details and is widely used for new steel structure buildings, public building roof projects and old roof renovation works.
2. Structural Composition & Technical Specifications
Product Structural Features
Different from traditional multi-layer composite waterproof membranes, this product features an all-in-one homogeneous polymer structure that completely avoids common quality risks such as delamination, peeling and interlayer separation. The surface, core and bottom of the membrane share identical composition and consistent physical properties. Made from high-purity PP and EPDM blended matrix and eco-friendly additives, it contains no PVC, harmful phthalates or corrosive components, ensuring safe and stable long-term operation in various engineering scenarios.
Standard Technical Parameters
Execution & Certification Standards: GB 27789-2011, ASTM D6878; complete official test reports available
Available Thickness: 1.2mm, 1.5mm, 1.8mm, 2.0mm (1.2mm/1.5mm for conventional projects; customized thickened sizes available)
Standard Width: 1.5m, 2.0m (custom widths available)
Standard Length: 20m, 30m (custom fixed lengths available; special transport required for extra-long rolls)
Color & Energy-saving Performance: Off-white (standard); Solar reflectance ≥0.80, Thermal emittance ≥0.85, meeting cool roof energy-saving standards; customized dark colors optional
Low-temperature Resistance: No cracking at -40℃ (tested per GB 27789)
High-temperature Stability: No sagging or deformation at 80℃, delivering reliable high-temperature dimensional stability
Welding Performance: Fully hot-air weldable; weld strength exceeds or equals base membrane strength for seamless integral fusion
Core Mechanical Properties: Tensile strength ≥10MPa (GB/T 528); Elongation at break ≥500% (GB/T 528); Puncture resistance ≥200N (GB/T 328.23)
Thermal Aging Resistance: After 28-day aging test at 80℃, tensile strength and elongation retention both reach ≥90%, minimizing performance attenuation in long-term outdoor use
Weather Resistance: Built-in UV and ozone resistant formula effectively prevents chalking, cracking and fading, adapting to long-term fully exposed roofing conditions
3. Core Product Advantages
Fully Homogeneous Structure & Flexible On-site Fabrication
The integrated homogeneous structure eliminates hidden delamination risks fundamentally. With excellent low-temperature toughness, the membrane supports free cutting and arbitrary shaping on site. It can be bent and hot-air molded to closely fit around pipe roots, protruding components and curved structures, solving tricky waterproofing problems for complex roof flashing and detailed nodes.
Integral Heat Welding & Seamless Watertight System
Thanks to its unified homogeneous material property, all lap joints and edge details can be fully heat welded to form an integral waterproof layer. Welded joints leave no capillary leakage paths, effectively preventing joint peeling, cracking and water seepage. It delivers stable and long-lasting waterproof performance for exposed single-ply roofing systems.
Eco-friendly Formula & Multi-corrosion Resistance
Free of halogens, toxic ingredients and migratory plasticizers, this recyclable material will not corrode roof insulation layers or building substrates. It resists acid, alkali, oil stains and rain erosion effectively, suitable for long-term service in corrosive scenarios such as chemical plants, breeding bases and waste treatment stations.
High Solar Reflectivity & Ultra-long Weather Durability
Featuring a solar reflectance above 0.80 and compliant with cool roof standards, the membrane reduces roof heat accumulation and cuts building energy consumption significantly. Its premium anti-aging formula supports long-term exposed installation without extra protective layers, delivering stable performance and a service life of over 20 years under conventional working conditions.
Strong System Compatibility & Diverse Construction Adaptability
Fully compatible with complete sets of TPO roofing accessories, the membrane supports three mainstream construction methods: mechanical fastening, full adhesion and loose-laid ballast installation. It can be flexively matched with different wind load grades and roof structures, offering high construction adaptability and wide engineering applicability.
4. Application Scenarios
Complex Roof Detail Waterproofing: Provides professional flashing and sealing for internal and external corners, gutters, expansion joints, equipment bases, pipe roots and drain outlets on steel factories, warehouses and commercial buildings, thoroughly solving common node leakage issues.
Special-shaped Building Waterproofing: Achieves integrated waterproof sealing for curved roofs, dome structures and special-shaped skylights, with excellent fitting flexibility for irregular building surfaces.
Old Roof Renovation & Upgrading: Suitable for local repair of damaged waterproof layers, parapet renewal, existing waterproof system reinforcement and aging detail restoration for various old building roofs.
Corrosive Environment Waterproofing: Applied to anti-corrosion waterproof sealing for industrial buildings in chemical parks, waste treatment plants and livestock breeding facilities with harsh corrosive conditions.
5. Standard Construction Guidelines
Base Surface Treatment: Keep the base layer solid, flat, dry and clean. Remove sharp protrusions, oil stains, ponding and dust completely to avoid membrane piercing and poor welding adhesion.
Construction Environment Requirements: The optimal construction temperature is above 5℃. Preheating is mandatory when the ambient temperature is below 5℃. All construction work is prohibited in rainy, snowy, windy and foggy weather to guarantee welding quality.
Standard Lap Width Specification: Longitudinal lap width ≥80mm, transverse lap width ≥120mm. Specific dimensions can be adjusted according to project design requirements.
Professional Heat Welding Process: Construct with dedicated TPO hot-air welders. Recommended parameters: welding temperature 500–600℃, travelling speed 1.5–2.5m/min (for reference only). Trial welding and peel strength tests are required before large-area construction to ensure flawless welding joints.
Key Node Reinforcement Treatment: Lay 150–300mm wide reinforcement membrane at corners, pipe roots and equipment bases. In low-temperature environments, pre-soften the membrane with hot air or adopt cold bending treatment for tight fitting before welding and fixing.
Flexible Fixing Systems: Compatible with three mature construction solutions: mechanical fastening, full adhesion and loose-laid ballast system, which can be selected based on actual wind load and structural design.
Edge Sealing & Termination Treatment: Install matched metal termination trims at all membrane edges and seal with professional TPO sealant to prevent edge warping and water infiltration, achieving reliable roof edge sealing.
Finished Product Protection: Avoid sharp object impact and mechanical piercing after construction. Do not walk, stack materials or carry out other construction activities on the finished surface within 24 hours to ensure complete curing of the waterproof layer.
6. FAQ
Q1: What are the biggest advantages of fully homogeneous TPO membrane?
A1: It has no delamination risk. All seams can be hot-air welded into a seamless whole, delivering superior waterproof performance and a service life over 20 years for exposed roofing.
Q2: Can it be used in low temperature and corrosive environments?
A2: Yes. It stays crack-proof at -40℃, and resists acid, alkali and oil erosion. It works well for chemical plants, farms and other harsh sites.
Q3: What installation methods does it support?
A3: It supports mechanical fastening, full adhesion and loose-laid ballast. Standard sizes and customized specifications are both available for various roof projects.
7. Product Summary
Complying with GB 27789 and ASTM D6878 standards, Type H Homogeneous TPO Membrane adopts an integral homogeneous structure with seamless heat welding and halogen-free eco-friendly formula. It features excellent low-temperature flexibility and strong corrosion resistance, effectively solving delamination, joint leakage and poor weather resistance issues of traditional waterproof membranes. Suitable for complex roof nodes, curved structures and corrosive working conditions, it serves as a cost-effective and durable waterproof solution for new high-standard buildings and roof renovation projects.
