Best Gap Filling Putty for Miniatures and Models
Updated How we research
The Army Painter Green Stuff Kneadatite 20cm - 2-Part Epoxy Modelling Putty for Miniatures
The Army Painter Green Stuff Kneadatite in a 20cm strip, a 2-part epoxy modelling putty for miniature sculpting.
Milliput Superfine Grain Epoxy Putty, 2-Part Self Hardening White, 4 oz.
Milliput Superfine Grain epoxy putty in white, a 2-part self hardening 4 oz putty for smooth gap filling and sculpting.
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 short version
We compared 7 picks. Our scores range from 7.2 to 8.1 out of 10.
- Best overall:The Army Painter Green Stuff Kneadatite 20cm - 2-Part Epoxy Modelling Putty for Miniatures. Highest overall score in this guide at 8.1/10.
- Also great value:Milliput Standard Grain Epoxy Putty, 2-Part Self Hardening Yellow-Grey, 4 oz.. Value score of 9/10, overall 8.0/10.
- Solid build:Milliput Superfine Grain Epoxy Putty, 2-Part Self Hardening White, 4 oz.. Build and materials score of 8/10, overall 8.1/10.
- Feature-rich:Milliput Superfine White Epoxy Putty 2 Pack - Porcelain Repair Kit. Features score of 8/10, overall 7.8/10.
Scores are our editorial assessment, not customer ratings. How we score
- 1.The Army Painter Green Stuff Kneadatite 20cm - 2-Part Epoxy Modelling Putty for Miniatures8.1/10See on AmazonCheck price
- 2.Milliput Superfine Grain Epoxy Putty, 2-Part Self Hardening White, 4 oz.8.1/10See on AmazonCheck price
- 3.Milliput Standard Grain Epoxy Putty, 2-Part Self Hardening Yellow-Grey, 4 oz.8.0/10See on AmazonCheck price
- 4.Milliput Superfine White Epoxy Putty 2 Pack - Porcelain Repair Kit7.8/10See on AmazonCheck price
- 5.Green Stuff World MAXX Putty (300gr)7.8/10See on AmazonCheck price
- 6.Tamiya Epoxy Sculpting Putty7.3/10See on AmazonCheck price
- 7.Green Stuff World - Green Putty 2241 for Models and Miniatures7.2/10See on AmazonCheck price
#1The Army Painter Green Stuff Kneadatite in a 20cm strip, a 2-part epoxy modelling putty for miniature sculpting.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10
- + Classic Kneadatite formula is the standard for mini conversions
- + Blue and yellow strip mixes to a tough green sculpting putty
- + 20cm length covers plenty of fur, cloaks and gap fills
- - Sticky when fresh, so tools need water or lubricant
- - Cut ends of the strip can start curing where colors touch
#2Milliput Superfine Grain epoxy putty in white, a 2-part self hardening 4 oz putty for smooth gap filling and sculpting.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10
- + Superfine grain gives a smooth finish for visible seams
- + White color makes it easy to see coverage under primer
- + Hardens to a sandable, carvable surface for fine repairs
- - Softer working time can make sharp details slump
- - Slightly pricier than the standard grain version
#3Milliput Standard Grain epoxy putty, a 2-part self hardening yellow-grey putty in 4 oz for filling gaps and repairs.
Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 9/10
- + 2-part epoxy hardens rock solid and can be sanded or drilled
- + Water-smoothable, so gap edges blend neatly before curing
- + 4 oz pack lasts through many models and repairs
- - Standard grain is coarser than superfine for tiny detail
- - Mixing equal parts takes care to get a proper cure
#4A 2 pack of Milliput Superfine White two-part epoxy putty, two 4 oz packs (8 oz in total) with gloves, for gap filling, repairs and smooth sculpted detail.
Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 7/10
- + Superfine White is the smoothest Milliput grade, suited to fine gap filling and detail
- + Two 4 oz packs give plenty of putty for a large army or several conversion projects
- + Two pairs of latex-free gloves are included for mixing the two parts
- - Sold as a household repair bundle, so the pack is larger than most painters need at once
- - Two-part epoxy has to be kneaded together and cures slowly compared with acrylic fillers
#5Green Stuff World MAXX Putty is a two-part epoxy putty in a 300 g pack. Mixed 1:1 it gives a clay-like beige putty with about 90 to 120 minutes of working time for sculpting and filling.
Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 7/10
- + Around 90 to 120 minutes of working time leaves room to shape details or press putty into gaps without rushing
- + Cures at room temperature to a rock-hard finish (Shore D 80) that can be sanded, drilled and painted
- + Smooths with water or alcohol on wet fingers or gloves, and 300 g goes a long way on conversions and bases
- - A larger and pricier pack than a strip of classic green stuff, more than you need for a few small gap fills
- - Full hardness takes about 24 hours, and it mixes to beige instead of the familiar green of Kneadatite
#6Tamiya Epoxy Sculpting Putty, a smooth two-part putty for sculpting details and filling gaps on scale models.
Fit for the job 8/10 · Features and specs 6/10 · Build and materials 8/10 · Value 7/10
- + Smooth texture blends well for seams and sculpted details
- + Tamiya consistency makes results predictable across batches
- + Sands and carves cleanly after curing, so seams blend in
- - Check the pack amount before ordering enough putty
- - Longer cure time than quick-set fillers, which slows painting
#7Green Stuff World Green Putty (ref 2241), a water-based acrylic filler with an extra fine grain that dries fast and hard for filling seams on miniatures.
Fit for the job 7/10 · Features and specs 7/10 · Build and materials 7/10 · Value 8/10
- + Extra fine-grained filler made specifically for models and miniatures
- + Listed as not shrinking when it dries, so seams usually need one application
- + Water-based, with good adhesion and easy sanding once hard
- - An acrylic filler, not two-part epoxy putty, so it is for filling gaps and not for sculpting
- - Fast drying leaves a short working time on larger gaps
Before you buy: trade-offs we flagged
No pick is perfect. These are the main compromises we noted for the top products in this guide, so you can check they will not matter for you.
- Sticky when fresh, so tools need water or lubricant (The Army Painter Green Stuff Kneadatite 20cm...)
- Softer working time can make sharp details slump (Milliput Superfine Grain Epoxy Putty, 2-Part...)
- Standard grain is coarser than superfine for tiny detail (Milliput Standard Grain Epoxy Putty, 2-Part...)
- Sold as a household repair bundle, so the pack is larger than most painters need at once (Milliput Superfine White Epoxy Putty 2 Pack -...)
- A larger and pricier pack than a strip of classic green stuff, more than you need for a few small gap fills (Green Stuff World MAXX Putty (300gr))
- Check the pack amount before ordering enough putty (Tamiya Epoxy Sculpting Putty)
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. The Army Painter Green Stuff Kneadatite in a 20cm strip, a 2-part epoxy modelling putty for miniature sculpting. It earns our score of 8.1/10, based on fit for the job, features, build and value.
›What is a good budget option?
Milliput Superfine Grain Epoxy Putty, 2-Part Self Hardening White, 4 oz. is the strongest low-cost pick in this guide. Milliput Superfine Grain epoxy putty in white, a 2-part self hardening 4 oz putty for smooth gap filling and sculpting.
›How much should I expect to spend?
Picks in this guide span See on Amazon price bands (roughly: $ = under $30, $$ = $30 to $100, $$$ = over $100). We never display exact prices because they change constantly, so the buttons above always show Amazon's current price.
›How were these products chosen?
We shortlist products that fit the job this guide solves and compare their published specifications, such as size, capacity, materials and what is included. Each pick gets an editorial score out of 10 for fit, features, build and value, and we write the pros and cons from those details. Our score is not an Amazon customer rating. We earn a commission if you buy through our links, which never affects the ranking.
Mini Paint Lab independently selects every product; we may earn a commission from links above.
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