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ENGAGE™ TR for Thermoplastic Polyolefin Roofing

Thermoplastic Polyolefin Roofing Membrane Solutions: ENGAGE™ TR POE

When it comes to roofing, materials matter. Dow’s ENGAGE™ TR Polyolefin Elastomer (POE) offers an ethylene-based solution specially designed for low-sloped thermoplastic polyolefin (TPO) roofing membranes. With superior flexibility, weatherability, toughness, and weldability, ENGAGE™ TR POE enables roofing membrane systems with easy installation, longer lifetimes, and improved reliability.

Tough, resilient, flexible, and waterproof

These are just some of the many benefits ENGAGE™ TR POE brings to low-sloped roofing membranes across the globe. The unique olefin block-copolymer, which is used in the top and bottom layers of roofing membranes to provide exceptional performance, is an essential part of Dow’s diverse portfolio of roofing science innovations.

ENGAGE™ TR Polyolefin Elastomers: Roofing solutions for TPO membranes
Learn about the advantages of using ENGAGE™ TR POEs in TPO roofing membranes.

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Roofing innovations that outperform

Roofing membranes produced with this Dow solution overcome the limitations of conventional polypropylene-based TPO roofing membranes. They’re tougher, more flexible, and have superior UV resistance. That means easier installation, increased longevity due to superior weatherability, and excellent hail resistance.

Learn how unreinforced TPO roofing membranes produced with ENGAGE™ TR POE outperform the alternative:

ENGAGE™ TR Polyolefin Elastomer vs. Polypropylene TPO

Roofing Membrane Properties

ENGAGE™ TR POE

Polypropylene TPO

Tensile modulus

49 MPa

82 MPa

Tensile strength

17.5 MPa

17.0 MPa

Tensile strength retention after heat aging*

85%

30%

Tensile elongation retention after heat aging*

99%

3%

Loss of weight loss after 10,000 hours of UV aging**

0.7%

2.8%

Surface crack at UV radiation initiation time**

10,000 hours

6,000 hours

Membrane brittleness point (ASTM D2137)

-65°C

-45°C

Welding initiation temperature (welder setting at 4.5 m/min)

320°C

380°C

*Based on Dow testing that compared an unreinforced roofing membrane made with ENGAGE™ TR POE with an un-reinforced roofing membrane made a polypropylene TPO at the same additive and filler formulation. Additional information available upon request.
**After 8,000-hour heat aging at 116°C per ASTM D6878
***Xenon-Arc aging at 0.7 W/(m2· nm) at 340 nm per ASTM D6878