Polycarbonate Heat Resistance – Part 2

Continuing the topic on Polycarbonate Heat Resistance, we are going to discuss polycarbonate sheets and its use as a heat resistance cover material.

As mentioned in Part 1., polycarbonate is known for its good heat resistance compared to other thermoplastics, and has a high glass transition temperature (Tg) and a melting point higher than many other common plastics.

Owing to polycarbonate heat resistance properties, VULCAN polycarbonate sheets are being used, but are not limited to the following applications :

    1. Greenhouses: As mentioned earlier, polycarbonate is commonly used in greenhouse construction due to its ability to withstand the varying temperatures experienced in these structures.
    2. Skylights: Polycarbonate skylights are roofing or glazing elements made from polycarbonate material and are used to allow natural light into buildings. They are installed on roofs, ceilings or windows and serve to brighten interior spaces, reduce the need for artificial lighting during the day, and enhance the overall aesthetics of the building.
    3. Pergolas: A polycarbonate pergola is a freestanding outdoor structure with a roof made from polycarbonate panels. Pergolas are often used to create shaded seating areas, walkways, or outdoor entertainment spaces.
    4. Windows: Polycarbonate windows are windowpanes made from polycarbonate material instead of traditional glass.  Known for its outstanding impact resistance, shatter proof, transparency, and durability, polycarbonate sheets are increasingly being used as an alternative to glass.
    5. Canopies: A polycarbonate canopy is a roof-like structure attached to a building or existing outdoor structure and covered with polycarbonate sheets to create sheltered areas, which like pergolas, are also often used to create shaded seating areas, walkways, or outdoor entertainment spaces.
    6. Security Glazing: Polycarbonate is utilized in safety goggles, face shields, and protective visors due to its ability to withstand impact and high-temperature environments.

    You may notice that heat resistance properties of polycarbonate sheets aforementioned represents only the integrity of the material, but not the affect it has on the covered area as a whole.  This is due to polycarbonate being one of the most transparent of all plastics, and any additional properties such as shading, IR reflection, temperature reduction, color change, fire resistance, and scratch resistance, to name a few, has to come from the polycarbonate material being altered, added, co-extruded, or coated in order possess the added qualities.

    To achieve the specific goal of heat resistance, or more specifically, solar heat reduction, VULCAN Plastics have dedicated years of research and development to come up with the following materials, each with a combination of unique properties to meet different heat resistance requirements.


    • Clear but Cool – Transparent IR Protection
    • Exceptional Heat Reduction – Reduce temperatures by max. 15°C or 59°F.
    • Weathering Resistant – Lasts 15 years or more due to excellent UV protection and lower surface temperatures.
    • High Clarity – High Transparency + High Gloss + Low Haze
    • Comes in two translucent colors – Solar Green and Solar Blue.


    • Shaded and Cool – Opaque Heat Reduction
    • Exceptional Heat Reduction – Reduce temperatures by max. 13°C or 55°F.
    • Weathering Resistant – Clariant UV and Light Stabilizers for extra durability and longevity.
    • Extra Shade + High Gloss + High Haze.
    • Comes in four beautiful low transparency metallic colors – Metallic Blue, Green, Silver and Bronze.


    • Made with genuine mother of pearls.
    • Diffused and Cool – Solar selective wavelength penetration.
    • Soft Diffused Lighting – Filters unwanted wavelengths, retaining cool, diffused GREEN light.
    • Controlled FIR and NIR – Reduce temperatures by max. 10°C or 50°F.
    • Weathering Resistant – Clariant UV and Light Stabilizers for extra durability and longevity.
    • Extra light diffusion + High Haze + Balanced light.
    • Aesthetically pleasing Pearlescent luster.

    It’s important to note that prolonged exposure to high temperatures, especially when also exposed to the elements, can still cause polycarbonate to degrade or lose some of its mechanical properties. If exposed to temperatures above its recommended range for extended periods, it may become brittle, warp, or discolor.

    Overall, polycarbonate is well-suited for applications that require good heat resistance, and with the inclusion of certain additives such as Solarshield, Ti-Lite, and Pearly, will provide even more properties in addition to its original heat resistance qualities.  If you have specific temperature requirements for your application, please consult let us know and we will be more than willing to explore and develop new options to suit your intended use.