Best Gap Filling Putty for Miniatures and Models
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Every multi-part kit has seams, and primer makes them more visible, not less. Gap filling is the unglamorous step between assembly and priming that separates clean models from obviously glued-together ones. The right filler depends on the gap. Liquid putties flow into hairline seams and sand smooth, epoxy putties bridge the large joins on resin and metal models, sprue goo melts into polystyrene joints and sands like the surrounding plastic, and thick CA glue with accelerator fills and cures in seconds. This guide compares the most effective gap fillers across all these categories, judged on shrinkage, sanding behavior, working time, and how well each one preserves nearby detail when you clean up the excess.
The Army Painter Green Stuff Kneadatite 20cm - 2-Part Epoxy Modelling Putty for Miniatures
A practical pick for this project.
Milliput Standard Grain Epoxy Putty, 2-Part Self Hardening Yellow-Grey, 4 oz.
A practical pick for this project.
#1A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
#2A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
#3A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
#4A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
#5A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
#6A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
#7A practical pick for this project.
- + A solid, well-reviewed pick
- + Good quality and everyday value
- + Practical for the job
- - Confirm the size or type you need
- - Check the material and details
Frequently asked questions
›What is the best choice among gap filling putty for miniatures and models?
The Army Painter Green Stuff Kneadatite 20cm - 2-Part Epoxy Modelling Putty for Miniatures is our top overall pick. A practical pick for this project.
›What is a good budget option?
Milliput Standard Grain Epoxy Putty, 2-Part Self Hardening Yellow-Grey, 4 oz. is the strongest low-cost pick in this guide. A practical pick for this project.
›How much should I expect to spend?
Picks in this guide span $ price bands (roughly: $ = under $30, $$ = $30–100, $$$ = over $100). We never display exact prices because they change constantly — the buttons above always show Amazon's current price.
›How were these products chosen?
Every product in this guide was individually researched on Amazon: we verify the exact listing, compare owner ratings and review volume, and write the pros and cons ourselves with small apartments and renters in mind. We earn a commission if you buy through our links, which never affects the ranking.
Last updated for 2026. Mini Paint Lab independently selects every product; we may earn a commission from links above.