# Purge only unused materials?

**URL:** <https://forum.dynamobim.com/t/purge-only-unused-materials/89049>\
**Category:** Revit\
**Created:** [April 28, 2023, 9:26am UTC](https://forum.dynamobim.com/t/purge-only-unused-materials/89049 "2023-04-28T09:26:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Draxl\_Andreas](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/draxl_andreas/32/145744_2.png) [@Draxl\_Andreas](https://forum.dynamobim.com/u/Draxl_Andreas)\
**Post date:** [April 28, 2023, 9:26am UTC](https://forum.dynamobim.com/t/purge-only-unused-materials/89049/1 "2023-04-28T09:26:53Z")

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Hello,

i want to purge only Materials  
https://www.youtube.com/embed/C1OZQYPOS5M?feature=oembed&wmode=opaque&list=PLv3VFPsJFOZprSp3G0ViBPSUJVu51G0RK

 ![2023-04-28_10h51_15](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/5/d59020442dbac5aea896aa73c5e8046a1926bdab.png)  
I tested MaterialAsset but it did not work…

is there a way to chop my purge in groups, materials and familytypes,…

KR

Andreas

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**Author:** ![christian.stan](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/christian.stan/32/166296_2.png) [@christian.stan](https://forum.dynamobim.com/u/christian.stan)\
**Post date:** [April 28, 2023, 9:59am UTC](https://forum.dynamobim.com/t/purge-only-unused-materials/89049/2 "2023-04-28T09:59:00Z")

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Hello, maybe this direction

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/0/d02b6dcb65224148b264f71dddeeee36eef1c06e.png)

Cordially  
christian.stan