UI Shader Mask

Hey there guys! I'm experiencing some issues that i don't know how to proceed and would appreciate some light for my project. Right now i have a shader that uses the dissolve from here: https://assetstore.unity.com/packages/vfx/shaders/dissolve-edge-92681/reviews The thing is that I want to apply it to some UI elements we have in our project but acting as a mask to reveal the contents inside of the dissolver. I thought on using it as an inverted mask, but can't seem to work. As what I want is the dissolve texture affect what contains the "Image" as a childs.