How well does this stuff insulate?

[JSU]

I just got some Dattex latex-based insulating foam (the spray on stuff) and I was wondering how well it insualted compared to poyurethanr foam..... Thanks!

[Redwolf]

Look for the R value per inch of thickness

[100]

Polyurethane is a supreme insulator. You'll find it hard to beat petroleum Polyurethane.

BTW sounds like your Dattex latex-based insulating foam is polyurethane, look on the ingredients for ethene, alcohol, propyl, ethane, butane. You may have yourself a winner there.