Coating System

Alunar® Coating System

Embedded with Teflon™ Surface Protector

Interlock’s cool roof coating technology applied on a metal roof can greatly reduce heating and cooling costs for your residential property.

All Interlock Metal Roofing Systems are coated with the Alunar Coating System embedded with Teflon Surface Protector.

Interlock’s reflective surface actually reduces home’s temperature during summertime heat, saving you up to 25% on your cooling costs†.

All Interlock® Metal Roofing products utilize a unique low gloss matte finish technology.

Energy Absorbing Dark Roof

Energy-Absorbing Dark Roof

Energy Absorbing Dark Roof

Reflective and Emissive Cool Roof Surface

  • Visible light waves
  • UV waves

Cool Roofing

  • Reflects solar energy
  • Emits solar heat from buildings
  • Reduces building cooling expenses
  • Mitigates Urban Heat Island Effect

Energy Efficient Metal Roof Coating Technology

The Interlock® Roof featuring the Alunar® Coating System embedded with TEFLON™ Surface Protector provides homeowners the ultimate in durability and protection from stains, moisture, and organic debris.

Alunar Coating System Embedded Teflon Surface Protector Logo
Alunar Coating System Diagram
  • Alunar Coating System
  • Primer Base Coat
  • Conversion Coating
  • Alkaline Cleansed
  • Aluminum
  • Back Coat
Energy Star

Alunar® Coating System Advantage

  • Energy Star® Rated (US only)
  • CRRC (Cool Roof Rating Council) Rated
  • LEED 29 standards compliant
  • Harder and more flexible than other premium PVDF coatings on the market
  • Cool Roof pigments deflect UV rays to lessen the heat island effect
  • Environmentally friendly
  • Outstanding Protection from acid rain and corrosive environments
  • Excellent color retention and resistance to chalking and fading
  • Available in a wide variety of colors
  • Formulated with ceramic IR reflective pigmentation to meet high and low-slope Energy Star specifications

*Independent testimonial from an industry expert. Robert worked as Director of Product Innovation Services for LO, Business Development Manager for the Industrial Coatings Division for BASF Corporation and is a founding Board Member for the Cool Metal Roofing Coalition.

Energy Efficient Tax Credits

All residents of the United States are eligible for Energy Efficiency Federal Tax Credits of up to $500.


Cool Roof Rating Council

The following Alunar® coatings are CRRC rated and available for Title 24 of the California Code of Regulations: California’s Energy Efficiency Standards for Residential and Non-residential Buildings.