Why Your Play Mat Curves at Edges and How to Fix It
By Mats by Mars - Print-On-Demand Wargaming and Role | Published: 2026-10-25
Category: Tips & Care
Learn why neoprene wargaming mats curl at the edges and how to flatten them with simple storage and care tips.
Quick answer
Play mat edges curl mainly from improper storage or humidity. To fix it, reverse-roll the mat and let it rest flat; for persistent curves, apply gentle weight or heat.
Why edges curl in the first place
Neoprene mats, like those from Mats by Mars, are flexible and durable, but they can develop curled edges if stored rolled tightly for long periods, especially in humid conditions. The memory of the roll sets into the material over time.
Another common cause is laying the mat on a surface that isn't perfectly flat or clean. Dust or debris underneath can create bumps that push edges upward. Temperature changes also make neoprene expand and contract slightly, which can exaggerate curling.
When curling means a different problem
If your mat curls immediately after unboxing, that's normal for a new print-on-demand mat. It usually flattens within a few hours. If curling persists after a week of flat storage, the mat may have been stored incorrectly before shipping, but this is rare.
Deep creases or permanent waves that don't respond to flattening methods may indicate a manufacturing defect. In that case, contact the seller rather than trying aggressive fixes that could damage the surface.
Diagnose and fix curling edges
- Symptom: Edges lift more than 1/4 inch above the table surface, or the mat rocks when you press a mini down near the edge.
- Likely cause: The mat was stored rolled for more than a few days, or it was placed on a damp or uneven surface. Humidity above 60% can soften the neoprene and lock in the curl. Check your storage area humidity and surface flatness before trying fixes.
- Corrective action: Reverse-roll the mat (opposite direction of the curl) and leave it unrolled flat for 24 hours. If still curled, place a heavy book or flat weight on the edge for another 12 hours. For stubborn cases, gently warm the edge with a hairdryer on low heat from 6 inches away, then flatten immediately. After flattening, store the mat flat or loosely rolled with the print side out to prevent recurrence.
- Stop or choose another option: If the mat has deep permanent creases or the neoprene surface is peeling at the edge, do not apply heat or weight. Contact the manufacturer for a replacement. Print-on-demand mats are made to order, so minor cosmetic variations are normal, but structural damage is not.
Product facts
- Mats by Mars: Dark Caribbean Tabletop Wargaming Play Mat: The Dark Caribbean mat is a print-on-demand neoprene play mat available in sizes from 22"x30" up to 48"x48". Larger mats are more prone to edge curling if stored rolled, so choosing the right storage method matters more for bigger sizes.
Mats by Mars: Dark Caribbean Tabletop Wargaming Play Mat
