How to Use Green Stuff on Warhammer 40,000 Miniatures: Sculpting Basics

October 15, 2026

How to use green stuff on Warhammer 40,000 miniatures: mixing, stopping it sticking, the tools you need, and sculpting simple fur, cloth, cables and sandbags.

Green stuff is the hobby nickname for the yellow-and-blue two-part epoxy putty that turns green once mixed. It is the go-to material for filling gaps on organic shapes, smoothing conversions and adding simple details such as fur, cloth, cables and sandbags. You do not need to be a sculptor to get good results; most useful jobs come down to a few basic shapes and some patience.

The short answer: mix equal parts of the yellow and blue putty until it is an even green, keep your tools and fingertips damp with water so it does not stick, and work in small amounts, pressing rather than dragging. Block in the shape while the putty is soft, add fine texture once it has firmed up a little, and leave it around 24 hours to cure before priming.

How is green stuff different from other putties?

Green stuff is a sculpting putty: it holds very fine detail and cures firm but slightly rubbery, which makes it hard to sand. Grey or white modelling putties cure stone-hard and file cleanly, so they suit hard edges and big gaps better. Many hobbyists blend the two to get a firmer putty that still takes detail.

Putty	Cured feel	Detail	Sanding	Typical use
Green stuff (yellow + blue)	Firm, slightly rubbery	Very fine	Poor	Fur, cloth, organic gaps
Grey or white modelling putty	Hard	Moderate	Excellent	Armour plates, hard edges, big gaps
50/50 blend of both	Firm, less stretchy	Good	Fair	General conversions
Harder sculpting putty (brown or grey)	Hard	Crisp	Good	Weapons, trim, mechanical detail

How do you mix green stuff?

Cut equal lengths from each ribbon, trimming off the strip in the middle where the two colours touch, because that part has already started to cure. Knead and fold until there are no yellow or blue streaks left; unmixed putty never fully hardens. Mix only what you can use within the next hour.

How do you stop green stuff sticking to everything?

Water is the simplest release agent, so dip your tools and fingertips regularly. Some sculptors prefer a very thin film of petroleum jelly, or a silicone-tipped colour shaper that putty barely grips. Too much water makes the putty slimy and stops it bonding to the model, so keep things damp rather than wet.

What tools do you need to sculpt with putty?

A double-ended metal sculpting tool, a silicone colour shaper, a sharp hobby knife and a cocktail stick cover almost every job. Large tool sets look tempting, but most hobbyists end up using two or three tools. Add a smooth ceramic tile or plastic lid to work on and a small pot of water.

How do you sculpt simple fur and hair?

Spread a thin layer, wait until it has firmed slightly, then press strands in with the edge of a tool using short, overlapping strokes in the direction the fur would fall. Work from the bottom upwards so each band overlaps the one below, like real fur. Stop before it looks perfect, because a drybrush will bring the texture out.

How do you sculpt cloth, cables and sandbags?

For cloth, roll a thin sheet, let it firm, cut it to shape, drape it in place and press folds in with a rounded tool. For cables, roll a sausage on a tile under a flat piece of plastic to keep the thickness even, or wrap putty round fine wire for strength. Sandbags are small flattened ovals with a seam pressed along one edge, and they look great on urban rubble bases.

When should you add fine detail?

Soft putty smears, while slightly firmer putty takes crisp lines. Block in the overall shape straight after mixing, wait somewhere between 20 minutes and an hour depending on the room temperature, then add the detail. If the putty starts to resist and spring back, it has gone too far for detailing and is best left to cure.

How long before you can prime and paint green stuff?

Leave it around 24 hours so it is fully cured, then prime as normal. If the primer beads or crawls, gently wash the area with warm soapy water to remove any leftover petroleum jelly, let it dry and try again. Our guide to priming miniatures covers the rest.

Is epoxy putty safe to handle?

Uncured epoxy putty can irritate skin and some people become sensitised to it with repeated contact. Wear thin nitrile gloves if you sculpt often or have sensitive skin, wash your hands afterwards, and keep uncured putty away from children and pets. Once fully cured it is inert and safe to handle.

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