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Q&A: Understanding the new ASTM Type-II standard for acrylic roof coatings

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Q&A | Understanding the new ASTM Type-II standard for acrylic roof coatings
January 23, 2019

Global

ASTM D6083 Type-II updates an older roof coating standard. How well do you know the details?

Last year, several members of the Roof Coating Manufacturer’s Association (RCMA) banded together to update the old ASTM standard for acrylic roof coatings. The new Type-II standard gives formulators the flexibility to create more competitive products.

How much do you know about the new standard? Read the Q&A below to test your knowledge and find out. Also don't forget to read the full story. [LINK TO https://insights.basf.com/home/article/read/raising-the-roof-coating-standards]

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Q&A

Q: What was the change in the low temperature flexibility specification?

A:  -26°C to -10°C - Coatings initially had to achieve low temperature flexibility at -26°C, but the new specification extends that number to -10°C, which is more applicable to some geographical regions.

Q: True or false: Type-II overrides Type-I, which means the previous specification is no longer valid.

A: FALSE - Type-II is an addition to the existing standard. Instead of replacing Type-I, it acts as an alternative.

Q: True or false: The ASTM change results in decreased performance factors.

A: FALSE - The new standard enhances several performance metrics, like improved tensile strength and weatherability — and in the case of Acronal® 4400, enhanced tear resistance and adhesion.

Q: What types of performance properties can be achieved thanks to the new standard?

A: Improved dirt pickup resistance, enhanced asphalt bleed resistance, and superior mechanical properties. The new standard gives formulators the freedom to make products with better mechanical properties, like Acronal® 4400, which also resists dirt pickup and asphalt bleed.

Q: What specific characteristic of Acronal 4400, now made possible by Type-II, translates to increased energy savings?

A: Increased solar reflectivity - White roof coatings made with Acronal® 4400 are better at reflecting the sun's rays, which reduces the building's energy consumption.
Last UpdateJanuary 23, 2019