How to Move Lava in Sandustry: The Cinder Method

You cannot move raw lava in Sandustry. It ignores conveyor belts and launchers, it is the one liquid that pumps and pipes refuse to touch, and it pours and spreads the instant you breach its chamber. The working method is a state change: freeze the lava with snow to make Scoria, break the Scoria into Cinder, transport the Cinder as an ordinary solid, then reignite it with the Flamethrower wherever you actually want lava. This guide covers the full Lava to Scoria to Cinder chain, containment, the Hydro Sponge shortcut, and how to keep automated burning lines fed with top-ups.

Why raw lava defeats every transport

Sandustry's official FAQ is blunt about pipes: they can move any liquid except lava. Pumps, Pipes, and Liquid Vents handle water and every other fluid in the game, but lava is excluded from that entire system. Conveyor Belts and Launchers only carry solids in the first place, so a glowing pool has no place in standard logistics either.

Lava is also a containment hazard rather than just an awkward cargo. When you dig into a new cave and see the orange glow, the pool often pours and spreads the moment the wall is open, flooding belts or water systems below. That is why experienced players stop and plan before breaking through, and why the freeze-first approach exists. Check the getting-started basics if the deeper caves are still new to you.

Step one: freeze the lava into Scoria

Lava freezes into Scoria when it touches snow; breaking Scoria produces haulable Cinder that can be reignited at the destination.

Dump a good amount of snow or ice onto the lava pool, and the lava freezes into Scoria. The Cryoblaster is the purpose-built tool for this and works on flowing or dripping lava too, so keep adding snow until the entire flow solidifies. Deeper cave layers generally hold larger lava deposits, though exact placement varies with map generation.

Breaking the wall of an unprepared lava chamber is the classic first-run disaster. Keep a Cryoblaster and a stock of snow ready whenever you open a new cavern so you can freeze a spreading flow on the spot. Freezing in place is always cheaper than digging melted lava out of your factory floor.

Step two: break Scoria into Cinder

Destroy the frozen Scoria with any weapon, rocket, shovel, or tool, and it breaks apart into Cinder. Cinder is a plain solid, which is the entire point of the conversion. It travels cleanly on belts, through launchers, into vacuums and grabbers, and on drones or any other solid transport you have unlocked.

Collect the Cinder with a vacuum or grabber right after breaking the Scoria, then store it in tanks or chambers near your haul route. A visible Cinder stockpile doubles as your fuel gauge, because every heat system in the game slowly consumes the lava it feeds on. When you want large reserves at base, hauling Cinder in bulk is far easier than dragging liquid lava across the map.

Step three: reignite Cinder at the destination

Only the direct flame of the Flamethrower converts Cinder back into lava. Passive heat sources such as thermal buffers and pyro dispensers will not do it, so plan on making the conversion trip yourself or positioning the Flamethrower carefully. Drop the Cinder into a small conversion chamber and torch it when heat is needed.

Build the chamber before you bring any Cinder in. It needs a solid liquid-tight bottom, carefully sealed sides, and filters on top so random sand or residue cannot fall in. One missing wall pixel is enough for lava to drip into places you do not want it, so double-check the containment before the first ignition. Overloading a small chamber with too much Cinder at once also makes conversion messy, so fill in stages.

The Hydro Sponge shortcut for surface lava

Once lava is above the surface, it can be moved freely as long as you have unlocked the Hydro Sponge upgrade. That is the official relocation route from the game's FAQ: cool the pool into Scoria, break it into Cinder, collect it, reignite with the Flamethrower wherever you want lava in your factory, and then use the Hydro Sponge to shove the exposed lava into its final position. The upgrade also covers awkward puddles of water, which makes it a solid early purchase.

What lava is actually used for

Lava is a consumable heat source with several jobs. The rising flames above its surface ignite residue, slag, seeds, and flowers, so you can place lava under planter boxes or burner lines and let the flames do the work as material passes over. Showcase factories from the Early Access release run lava directly underneath planter box rows, where the flames automatically ignite the grown plants without any manual torching.

The best-known burning setup traps lava inside filters. Fill a filter completely with Cinder, seal the surroundings so nothing escapes, and burn the Cinder until the filter holds lava; anything flammable passing over the top is then burned automatically. This is the standard way to turn Residue into Burnt Residue for the Kinetic Press without standing there with a Flamethrower.

Lava also feeds thermal buffers, which store and distribute heat. Buffers sitting in or on lava heat up while consuming it, and buffers suspended above a pool can be heated by the rising flames. Wide, shallow pools give far better flame coverage than deep, narrow ones, so shape your chambers for surface area.

Dropping water or snow onto lava produces steam instantly, and the amount of lava does not decrease from this reaction. That makes lava a free steam generator for as long as the pool lasts; see the steam guide for routing it into tanks and condensers. Copper and later materials also smelt when placed on a hot thermal buffer or near lava, and a pocket of lava doubles as an ice-melting tool during exploration.

Lava is consumable, so plan the top-ups

Every system that draws heat from lava gradually uses it up, and there is no vanilla endless-lava building in normal gameplay. Any genuinely infinite lava source comes from mods, not the base game. Treat lava like a fuel that needs scheduled deliveries rather than a permanent fixture, and your heat chains will not go cold mid-production.

A practical rhythm is a shared chamber that holds Cinder and converts it to lava on demand. Keep a belt feeding Cinder in through an advanced filter that allows only Cinder through and blocks everything else, especially snow. Larger factories eventually split into pure lava tanks and pure Cinder tanks, but a shared chamber carries most bases for a long time.

Common lava mistakes

• One missing wall pixel. Lava rains into the levels below your factory. Always re-check containment before igniting a fresh batch of Cinder.
• Snow mixed into water lines. Snow plus water turns to ice and clogs belts and tanks. Filter snow out early, away from your water infrastructure.
• Building deep instead of wide. Surface area drives useful flames for burning and buffer heating. A wide, shallow pool outperforms a deep, narrow one.
• No Cinder buffer. Heat systems slowly consume lava, and a run without reserves goes cold mid-production. Keep a visible stockpile.
• Trying to pipe or belt raw lava. It does not work in any version of the chain. Convert to Cinder first, every time.
• Letting steam rise freely. Uncontrolled steam condenses and floods random areas. Guide it with walls, filters, and vents.
• Relying on flame bubbles forever. Rising flames are convenient, but the pool still depletes and must be topped up with Cinder.

Sources and version notes

This page reflects Sandustry Early Access v0.5.x as of August 2026 (v0.5.5, Update #2, released August 19, 2026). The core transport chain (snow on lava makes Scoria, broken Scoria makes Cinder, Flamethrower reignites it, Hydro Sponge moves surfaced lava) comes from the official pinned Sandustry FAQ on Steam. Details on flame-only conversion, the steam reaction leaving lava volume unchanged, wide-versus-deep pool shaping, and the filter autoburner are from August 2026 community guides and showcase posts; the filter-autoburner trick also appears in an older pre-release thread where the developer endorsed it, but the exact chamber dimensions are player reports, not independently verified. The Hydro Sponge's fluxite price varies by coverage and is omitted here rather than quoted secondhand.