ACRYLITE® Heatstop Product Information

ACRYLITE® Heatstop sheet reduces heat build-up indoors

This sheet is an IR-reflecting material that reflects a large portion of incident solar radiation to limit the amount of heat entering a building while allowing an abundance of natural sunlight. This characteristic helps reduce energy consumption and makes the sheet a product that is well suited for “green” buildings.

By using ACRYLITE® Heatstop in place of traditional acrylic glazing materials, average annual air conditioning costs can be lowered by as much as 33%. At the same time, this sheet allows natural sunlight to illuminate interiors, reducing dependence on electrical lighting. This makes it ideal for rooftop glazing applications in warehouses, grocery stores, and other large commercial spaces, particularly in the warmer southern climates.

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Features & Benefits

  • Proprietary performance formulation provides strong and uniform natural lighting
  • IR-reflecting properties help reduce energy costs and lower internal ambient room temperatures
  • Forming and cold-curving attributes of traditional acrylic sheet products


  • Skylights
  • Light domes
  • Solariums
  • Bus shelters

Standard Product Offering

Size: 54” x 108”; 76” x 108”

Thickness: .118” (3.0 mm)

Color: White WZ005

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The graph below shows how this sheet reflects nearly twice the amount of solar energy in the IR range while continuing to transmit the same amount of visible light (about 54%). When replacing standard skylight white diffusing materials with this sheet, the heat build-up indoors is cut nearly in half, while light transmission stays the same. SHGC in this example is reduced to 33%.

ACRYLITE® Heatstop sheet WZ005 spectral measurement

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For every square foot of skylight replaced with ACRYLITE® Heatstop sheet, the savings are as high as $0.77/sq. ft. This figure can be used for calculating payback periods. As you can see the payback period is very favorable for this sheet. In applications where air conditioning is not used and there are no savings on air-conditioning energy costs, the number of high-temperature days indoors is reduced by 30%.

Cooling saving per sq-ft of skylight

LocationWarehouseGrocery Store
Florida $0.77 $0.75
Los Angles $0.43 $0.48
Detroit $0.30 $0.33
Oakland $0.29 $0.33
Seattle $0.19 $0.21
  • *72 skylights, 4’ x 8’ size
  • Electricity @ $0.12/kwh; fuel @ $1.151/therm
  • 3 levels of lighting control
  • Building size: 29,768 sq. ft.
  • Grocery store @ 50’ candles; warehouse @ 10’ candles

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ACRYLITE® Heatstop sheet FAQ’s

Are the IR reflecting properties a result of a coating?

No, the performance is not produced with a coating or laminate.

What are its forming properties?

This sheet is a continuously manufactured acrylic sheet thereby forming at conditions very similar to traditional acrylic glazing materials. In fact, some users have noted reduced cycle times at the same conditions.

What is the light transmission of ACRYLITE® Heatstop sheet?

The material itself has a 54% light transmission at 3.0 mm thickness, which is the same as the current WT031 white for skylights. However, the SHGC is cut in half, providing the light while reducing the heat.