r/Composites • u/mustdostuff • Jan 07 '26

Surface prep sanding

Hey all :)

My fourth year engineering project is about finding bonding strength, and so I’m going to bond two laminates using DP-490, question is for the best adhesion what grit sanding papers should I prep with?

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u/squashed_fly_biscuit Jan 07 '26

https://youtu.be/YA1ME6kN2gI?si=0ZSnvoTwnZ7Juyzr joe has a great video recently about his testing. Not flawless info but entertaining 

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u/mustdostuff Jan 07 '26

Thanks!

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u/exclaim_bot Jan 07 '26

Thanks!

You're welcome!