possible to reform kydex once formed?

Yes, but it is best to only re-heat small areas on a completed sheath to make the knife fit better. Re-heaing the area on the sheath where it locks on the hilt of the knife is common and can give you tighter or looser retention(whichever is desired). It is best done with a heat gun appying heat for a short time until the Kydex is pliable and then, while wearing gloves, apply pressure until it cools to the shape that you want! !If the area you need to reform is very small and you do not want to distort the area around the part you are working on, cover the outer areas with a rag/foil or somehing to block the heat!
 
Mheller said:
Yes, but it is best to only re-heat small areas on a completed sheath to make the knife fit better. Re-heaing the area on the sheath where it locks on the hilt of the knife is common and can give you tighter or looser retention(whichever is desired). It is best done with a heat gun appying heat for a short time until the Kydex is pliable and then, while wearing gloves, apply pressure until it cools to the shape that you want! !If the area you need to reform is very small and you do not want to distort the area around the part you are working on, cover the outer areas with a rag/foil or somehing to block the heat!
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Good point about only heating small areas. Awesome. I hope I can fix this sheath rattle.
 
I need to try to do this as well! I traded a year or so ago for a knife which turned out to be a factory second with a mismatched sheath. Too bad I did not know the markings at the time. Probably will not get to trying the reform until next week.
 
Just be careful heating around any fasteners. When the kydex becomes pliable you can easily pull an eyelet or chicago screw right through it, possibly enlarging the hole and making a mess trying to fasten it back together again.
 
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