Alunar® Coating System
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.
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
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 Coating Technology
The Interlock® Roof featuring the Alunar® Coating System provides homeowners the ultimate in durability and protection.

- Alunar Coating System
- Primer Base Coat
- Conversion Coating
- Alkaline Cleansed
- Aluminum
- Back Coat
Alunar® Coating System Advantage
- 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.
Black, Deep Charcoal, Musket Grey, Colonial Brown, Tudor Brown, Hunter Green, Tile Red, Royal Blue.
Related Topics
Metal Roof Colors
Metal Roof Colors Home Protected by the Alunar® Coating System Interlock Roofing offers a highly durable aluminum roofing product available in a range of different colors, opening up an extensive palette for homeowners and designers. Interlock® roofs are exclusively protected for a lifetime by the Alunar® Coating System. Get a Free Quote Copper Penny Solid
CRRC Rated Roof Products
CRRC Rated Roof Products Home Energy Efficient Roofing Products — Cool Roofs and Emissivity This export of the CRRC Rated Products Directory is generated once per day, so may differ slightly from the online version. For the most current version of the Directory, please see coolroofs.org/directory/ *CRRC Rapid Ratings: These are interim laboratory-aged values that
Energy Efficiency Federal Tax Credits for Interlock Roofing
Roof Tax Credits Home Energy Efficiency Federal Tax Credits Homeowners can receive a tax credit of 10% of the cost, up to $500, for Interlock Metal Roofing Systems installed on their principal residence. For more information about available Federal Tax Credits, please visit Energy® Star Downloads 2021 — Energy Efficiency Federal Tax Credit 2020 — Energy
Evaluation Testing Reports
Evaluation Testing Reports Home All of our products showcase our total commitment to protect and beautify your home for life, and to safeguard the environment. Our roofing systems will provide you with a lifetime of value. Free Quote Evaluation Report ESR1790 Evaluation Report CCMC 10475 Florida FL7263 UL-2218 Downloads CCMC ER10475 ESR-1790 Florida FL7263-R5 UL-2218
Specification Manuals
Specification Manuals Home All of our products showcase our total commitment to protect and beautify your home for life and to safeguard the environment. Our roofing systems will provide you with a lifetime of value. Get a Free Quote Slate / Cedar Shingle Shake Tile Standing Seam Downloads Slate / Cedar Shingle Spec Manual Shake