SURE-WELD® TPO
CARLISLE® SURE-WELD® TPO: The sustainable, high-performance flat roofing system perfect for large projects.
SURE-WELD® TPO is a single-ply, heat-weldable thermoplastic polyolefin (TPO) membrane ideal for large commercial and industrial roofing projects. It is a sustainable choice, made with recycled materials and low VOC emissions.
SURE-WELD® TPO is durable, has already been proven on over 500 million m² buildings worldwide and is now available for architects, specifiers and contractors in the UK.

Be Sustainable. Be Sure. SURE-WELD® TPO Waterproofing System
SURE-WELD® TPO roof waterproofing membranes are high-quality, single-layer membranes that consist of thermoplastic, flexible polyolefins on either side of an internal reinforcement layer. Building owners can choose from different colours depending on the desired use and aesthetic preferences.
The SURE-WELD® TPO waterproofing system features the unique OCTAGUARD XT™ weather protection, making it the industry-leading waterproofing solution in this product segment and ideal for industrial roofs or other large areas.
The waterproofing membranes are exceptionally resistant to weathering and ageing; therefore, they have a particularly long service life. In addition, they withstand a variety of mechanical and chemical influences for decades and are manufactured according to an environmentally friendly formula.
Benefits of SURE-WELD® TPO
Proven worldwide
CARLISLE® has over 20 years of experience with SURE-WELD® TPO.
More than 500 million m² installed worldwide and waterproofing roofs of factories, warehouses, hospitals, schools, large retail outlets etc.
Durable with high strength
Unique formulation in CARLISLE® SURE-WELD® TPO: The OCTAGUARD XT™ weather protection is industry-leading and makes the material durable and flexible.
The combination of TPO and polyester fabric provides for high breaking and tearing strength and excellent puncture resistance.
High hail resistance: Class 4 according to UL 2218.
Outstanding chemical resistance against acids, bases and restaurant fumes.
Fire protection approvals: Fire class E and BRoof (t4)*.
Long service life = long-term investment security.
* As part of a system build-up.
Versatile
For new construction and renovation.
Suitable for all lightweight roof substructures.
Bitumen-compatible – direct installation on old roofs made of bitumen/polymer bitumen and numerous plastic variants possible.
Root resistant – tested according to DIN EN 13948:2007 (FLL in testing) and therefore also suitable for all types of green roofs.
PV-ready – Due to its long service life, SURE-WELD® TPO is very well suited for permanent use under PV or solar installations and other technical structures.
Sustainable & Recyclable
Environmentally friendly and stable formula – No plasticisers, no halogens, no heavy metals.
Emission-free welding without smoke or odour.
Light grey reflective surface reduces the heating up of buildings and lowers the the energy consumption of air conditioning systems.
100% recyclable.
Our SURE-WELD® TPO product portfolio
With our SURE-WELD® TPO products, you are equipped for all the challenges your projects present. Discover your possibilities for sustainable waterproofing with CARLISLE®!
Our roofing membrane is durable, flexible, and safe for flat roof installation, boasting outstanding properties:
• Long service life
• Extremely resistant to external influences
• Compatible with bitumen
• Root resistant according to DIN EN 13948:2007 (FLL in testing)
• PV-ready
These are offered in rolls of 20 m in length
• Colours: White and Grey
• Widths: 1.52 m or 1.1 m
• Thicknesses: 1.5 mm, 1.8 mm or 2.0 mm
Our connecting membranes are cut to size from the surface membranes, so they also have a highly tear-resistant, internal reinforcement made of polyester fabric. The cut-to-size pieces are used in the execution of connections and terminations as well as cover strips for fastening rails.
Available in rolls of 20 m in length
• Colours: White and Grey
• Widths: 0.25, 0.50 or 0.75 m
• Thicknesses: 1.5, 1.8 or 2.0 mm
We have developed our detail sheet, especially for the execution of tricky details. The homogeneous TPO membrane without a carrier layer is highly flexible and therefore suitable for sealing penetrations of any kind.
Available in rolls of 15.2 m in length
• Colours: White and Grey
• Width: 0.6 m
• Thickness: 1.5 mm
SURE-WELD® – The right accessories for every application
SURE-WELD® TPO is a complete waterproofing system with an extensive range of accessories. Our wide range of system accessories includes everything you need to waterproof corners and edges, roof penetrations or for any specific installation requirements. All system components are compatible with our membranes and are aesthetically pleasing too.
Technical Data
Material properties | Value | |
---|---|---|
Total thickness | 1.5 mm -5% / +10% | |
Surface weight | 2.19 kg/m2 -5% / +10% | |
Standard delivery length per roll | 20 m -0/+5% | |
Width supplied | 1100 mm / 1520 mm (tolerances according to standard EN 13956) | |
Storage life | 10 m -0/+5 % | |
Stress from external fire | B ROOF (t4)* | |
Fire behaviour | Class E |