Sandustry How To Move Lava

You can't pipe, belt, or launch lava in Sandustry. It's a molten fluid, so the normal tools that move other materials — Pumps, Pipes, Liquid Vents, Conveyors, Launchers — either won't accept it or can't carry it. The reliable way to move lava is to change its state of matter first: freeze lava into Scoria with the Cryoblaster (the cryo gun), break the Scoria into Cinder, move the Cinder with your normal logistics, then re-ignite it at the destination with a heat source like a Flamethrower. Freeze, blast, haul, remelt — that four-step loop is the entire trick, and it's confirmed by the official Beginner's Guide.

Lava logistics is a mid-game skill. Demo players could see lava caves but couldn't move the lava; Early Access (released 2026-08-13) added the "portable Cinder warehouse" style of play.

Why lava won't move like other fluids

Lava behaves differently from everything else you transport, and the game is explicit about it:

• Lava is a liquid with density 75 in the material table, and it is flagged as not launchable — Conveyors and Launchers carry solid pixels, not lava.
• The official Beginner's Guide states that Pumps, Pipes, and Liquid Vents move fluids "other than molten fluids." Molten lava is the exception by design.
• Lava also reacts with water: it turns to Steam on contact, and steam rain can erase a lava pool.
• The official design advice is to ask whether a stubborn resource can be converted into another state of matter to make transport easier. Lava is the clearest example.

The freeze-blast-haul-remelt loop

The core loop is confirmed by the official process spoiler and multiple wiki sources:

• Lava + Cryoblaster (freeze) → Scoria, the frozen intermediate state.
• Scoria + mining or blasting (Rocket Launcher) → Cinder, a solid powder.
• Cinder hauled by Grabber, Vacuum, conveyor, Launcher, or Hauler Drone.
• Cinder + a hot enough source (Flamethrower) → Lava again.

Scoria is the solid intermediate — the material notes put it bluntly: don't try to belt lava, blast it. Cinder is a solid powder with density 50 that floats on water, can be launched, and burns: the "portable form of heat." As one guide puts it, "Portable lava is just Cinder with extra steps. Freeze, blast, haul, remelt."

Research you need first

Plan for three research unlocks before you build anything with lava (verify exact tree placement in the current build):

• Cryoblaster — Tools 3. Freezes water and solidifies magma.
• Rocket Launcher — Guns research branch. Blasts Scoria into Cinder.
• Flamethrower — Tools 1. Re-ignites Cinder back into lava.

Then you need a way to handle the loose Cinder: a Vacuum, Grabber, or Hauler Drone for the first loads, and a conveyor line later. One player reports a late-game "lava gun" that makes the process easier, but that's a single community comment and unconfirmed — treat it as player-reported.

Community advice is also clear on timing: don't build lava logistics before you have the Kinetic Slag Press (Refining 2). Without a press, the heat you moved is just scenery.

Building a working lava pool

Once you can move Cinder, the standard factory application is a lava pool that burns for you:

• Place a Filter set to allow only Cinder, fill it with Cinder, then ignite it with a Flamethrower so it becomes lava inside the filter bed.
• Seal the side walls — lava leaks out of an open pit.
• Pour Slag over the pool. Lava auto-burns Slag into Burnt Slag without a handheld Flamethrower; feed the Burnt Slag into a Kinetic Slag Press for more Gold.
• The same heat auto-burns flowers and Amethelis, which is why some factories route plant material past a pool.

Safety matters more than throughput. Never put water above or below the pool: stray shots can turn water to steam, and the resulting steam rain can delete the pool. Keep the slag hall dry, roof it, and vent steam away. Embers will ignite Moss and Flowers, so keep flammables off the edges.

Hauling Cinder across the map

Getting lava to where you need it is a two-stage problem, and the safest approach is to control the space around it rather than pushing a whole pool through an open tunnel:

• Short range: build closed channels and containment chambers. Leave overflow space and add a low collection basin so a surprise wave can't spread.
• First load: freeze a lava tongue into Scoria, blast it into Cinder, then Vacuum or Grabber it to a surface chest. Cinder floats on water, so it's easy to lose — keep it contained.
• Long range: stage and store Cinder at the source first. Don't copy pure-conveyor designs for fluid jobs — the official Conveyor reference notes that liquid behavior differs from solid-pixel transport, and one guide recommends unlocking Fluids research before routing Cinder with fluid or thermal facilities (verify in current build).
• A common pattern is a "Cinder conveyor": belt Cinder to a destination and remelt it there, turning portable heat into a logistics problem instead of a fluid one.
• If steam stacks block a line, drones can carry Cinder over them. Only remelt what you need — extra Cinder is strategic reserve.

Troubleshooting a lava setup

Most lava failures come from a handful of causes, all reported by multiple sources:

• Lava spreads out of control: the chamber is too open, or the destination sits lower than expected. Add walls with overflow space and a low collection basin.
• Water keeps getting in: separate water basins, steam paths, and rain catchment from the lava chamber.
• Cinder isn't turning back into lava: check that the heat source is active, clear downstream pileup blocking the conversion zone, and use a Filter to pull out impurities.
• The pool shrinks: melting consumes lava, so a pool slowly spends itself. Keep Cinder flowing in as fuel.
• Old methods stop working: Early Access changed the research and material systems, so anything you learned from demo-era videos should be re-verified in the current build.

FAQ

Q: Can I move lava with pipes or pumps? A: No. Pumps, Pipes, and Liquid Vents handle non-molten fluids only; molten lava is explicitly excluded in the official guide, and lava is not launchable.

Q: What's the fastest way to get my first Cinder? A: Freeze a lava tongue with the Cryoblaster (Tools 3), blast the Scoria with a Rocket Launcher, then vacuum it to a chest. Only remelt what you need.

Q: What happens if water reaches my lava pool? A: Lava turns to Steam on contact, and steam rain can erase the pool. Keep water basins, steam paths, and rain catchment away from the chamber.

Q: Why won't my Cinder turn back into lava? A: The most common causes are an inactive heat source, downstream pileup blocking the conversion zone, or a Filter holding back the Cinder.

Q: Is there an easier tool than freeze-blast-haul-remelt? A: One player reports a late-game "lava gun," but it's a single community comment and not confirmed — treat it as unverified in the current build.