Latest on Low-GPW XPS Board Insulation?

Cheryl - do you know what type of blowing agent Owens Corning plans to use for that reduced GWP XPS product? Is it HFO?

I’m interested if DuPont (formerly Dow, there was a merger apparently) is also planning to release a low-GWP XPS product. I reached out to DuPont awhile ago but never got a good answer. I see the DuPont Styrofoam product a lot: https://www.dupont.com/brands/styrofoam.html