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[steve mahoney]

One of my cutting mats – the green Raeco type, has developed a wave at each end. It's the large A1 size and not cheap to replace so I'd like to try and fix it.
I've tried leaving it under a heavy rug on the floor for 12 months, no improvement. Tried leaving it rolled for a few months, no joy. Now I'm leaving it in the sun all day but no luck so far.
Any ideas on how I can get it smooth and flat again?

[tigertiger]

It looks like the mat is drying out.

This is worth a go. Vinegar and water.
https://www.nationalquilterscircle.com/video/care-for-self-healing-cutting-mat/ "

In short




Your self healing mat loves moisture. To soak it, put your mat in a bathtub or large container (would have to be large so it can lay flat) and soak it for 15-20 minutes in a solution of 1/4 cup white vinegar to every gallon of cool water. Let me repeat, cool water. Do this every so often to help extend its useful life.

[steve mahoney]

Thanks, I'll give it a go.

[Meyer]

mine does this after being stored badly, I just pop it on top of the rayburn, let it warm up then lay it flat again and its fine

[Mark T]

I had this same problem a while ago. I found the best results came from putting a tea towel on it and then blasted stream through a steam iron over the top of the towel.  The mat never did go perfectly flat though and I did end up replacing it