The Army Painter Green Stuff Kneadatite 20cm - 2-Part Epoxy Modelling Putty for Miniatures Review (2026)

What it is

This is The Army Painter's Green Stuff, sold as a 20cm strip of Kneadatite, the original two-part epoxy putty used across the miniature hobby for decades for sculpting, gap filling and converting models. It ships as one blue and one yellow strip side by side, and you cut off equal amounts of each color and knead them together until the mixture turns a uniform green, which is where the putty gets its common nickname. It requires no heat, oven curing or UV light to set, unlike some newer sculpting materials, which makes it simple to use directly at the workbench.

Key features

According to the manufacturer, the putty gives a flexible working time of 20 to 30 minutes before it starts to firm up, which is enough time to knead, apply and shape it onto a model before it becomes unworkable. It is fully dry after about 8 hours, at which point it can be sanded and shaved for a smooth, clean finish rather than staying tacky or soft. The manufacturer describes it as a polymide and epoxy sealant and adhesive, which means it also functions as a strong bonding agent when used with pinning, holding awkward or heavy conversion parts in place alongside super glue.

Build and materials

The putty is a two-part epoxy system, meaning it only begins curing once the blue and yellow components are mixed together, so the unused strip keeps indefinitely in its packaging until you need more. Once cured, the hardened putty can be carved, filed and sanded, which is how most sculptors achieve fine detail after the initial rough shaping is done by hand. Painters commonly report that fresh, unmixed putty is sticky to handle, so keeping a small dish of water or petroleum jelly nearby to lubricate fingers and tools makes shaping considerably easier and less frustrating.

How it compares

Against other Kneadatite-branded and green stuff putties on the market, the working properties are largely the same since they use the same underlying epoxy chemistry, so the differences between brands mostly come down to strip length, packaging and price per length. Some rival strips offer more total length for a similar price, which matters if you sculpt often and go through putty quickly, while shorter strips like this one suit painters who only need putty occasionally for gap filling and small conversions. Milliput and similar two-part epoxy putties behave differently in texture and are generally chosen for finer, smoother sculpting rather than the more elastic feel of Kneadatite-style green stuff, so the choice between them often comes down to whether a project needs stretch or a hard, sandable finish.

Who should buy it

This suits a miniature painter or model builder who regularly does conversions, fills visible gaps between assembled parts, or wants to sculpt small details like cloaks, fur or freehand additions onto an existing model. It is a solid pick for anyone new to green stuff sculpting since the working time and no-bake curing make it forgiving to learn on. Painters who sculpt large or complex pieces often, and go through putty quickly, may find better value in a longer strip or a bulk pack rather than this 20cm length, which is sized more for occasional touch-up and conversion work.

Frequently asked questions