Mr. Waterproof Sand Paper #400 MT304

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$1.01 ~~$1.5~~ In stock

Mr. Waterproof Sand Paper #400 MT304 is a reliable abrasive sheet designed for wet sanding applications. This #400 grit option from Mr. Hobby is suitable for smoothing surfaces and preparing models or other projects for finishing.

Waterproof construction allows for wet sanding, which helps reduce clogging and achieve a smoother finish.
#400 grit provides a medium-coarse abrasive level, useful for removing imperfections or shaping materials.
Part of the Mr. Hobby lineup, a trusted brand in the modeling community.
Ideal for use on Gundam model kits and other hobby projects.

Customer Reviews (5.0 / 5 · 1 review)

Ellie U. ★★★★★ Oct 18, 2026

I was a bit skeptical about wet sanding until I tried this #400 grit sheet—it holds up perfectly without tearing or clogging even after soaking. The consistent abrasion made smoothing out the primer on my model kit so much faster and cleaner.