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Expansion

I feel this article needs expanding. I will make a start. GRALISTAIR ( talk) 15:17, 17 June 2023 (UTC) reply

I have added a whole new section on rigid polyurethane foam. It is referenced with cites to peer reviewed journals GRALISTAIR ( talk) 18:24, 19 June 2023 (UTC) reply

From Wikipedia, the free encyclopedia

Expansion

I feel this article needs expanding. I will make a start. GRALISTAIR ( talk) 15:17, 17 June 2023 (UTC) reply

I have added a whole new section on rigid polyurethane foam. It is referenced with cites to peer reviewed journals GRALISTAIR ( talk) 18:24, 19 June 2023 (UTC) reply


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