Wet Sand is the first material that proves a factory needs both production and separation. Make it before the Filter: a basic Filter has one solid-material rule, while Water passes through it rather than becoming a reliable rejection layer.
Recipe
Sand + Water
Matter type
Slushy
Basic Filter
One solid rule
Shaker output
Gold + Residue
Gold chance
About 25%
Last Checked: 24 August 2026
User-authorized in-game test · vanilla Early Access build · user save
Quick answer
Mix first, filter solids second
Make Wet Sand upstream by touching Sand and Water, then use a basic Filter only for its solid allow/block rule. Water passes through a basic Filter, so it is not a reliable rejection layer; keep the feed shallow before sending Wet Sand to a Shaker.
Make Wet Sand where Sand and Water touch, then route the new material toward the Filter. A Basic Filter does not keep Water out while allowing Wet Sand through: Water passes it, so it is not the separating layer for this conversion.
In my v0.4.12 test, 1 Sand and 1 Water made 2 Wet Sand. That is recorded here as a personal result, while the official Wiki remains the source for the material mechanism.
User-authorized in-game test · vanilla Early Access build · user save
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Personal mixing result used to verify the upstream conversion.User-authorized in-game test · vanilla Early Access build · user save
02
Use the Basic Filter for its solid rule
Configure the Basic Filter around the solid material you need to direct. Keep the feed shallow and formed before it reaches the rule; do not expect the Filter to repair a tall mixed pile that is still converting as it crosses.
Prepare, then separate
A shallow prepared Wet Sand feed.The downstream loop after material preparation.User-authorized in-game test · vanilla Early Access build · user save
03
Keep the feed shallow enough to inspect
A shallow layer makes it easier to see whether the Filter is receiving the intended solid. When material stacks high, correct the feed and mixing point first, then make the downstream Shaker route clear.
User-authorized in-game test · vanilla Early Access build · user save
Do not ask a tall mixed pile to self-correct
Keep the prepared input visible before it reaches a rule.The later route only works once each upstream hand-off is clear.User-authorized in-game test · vanilla Early Access build · user save
04
What Advanced Filter changes
The official documentation confirms that Advanced Filters can process Water and other liquids. It does not publish a complete universal mixed-fluid layout rule, so treat advanced arrangements as something to test in the current save rather than a replacement for a clean first Gold loop.
Filter choices in the first Gold loop
System
Handles
Confirmed rule
Keep testing
Basic Filter
One configured solid rule
Water passes through; it cannot reject Water while passing Wet Sand.
Feed height and exact current-save geometry.
Advanced Filter
Water and other liquids
Officially able to process liquids.
Mixed-fluid layouts and all edge cases.
Official Wet Sand illustration. The full early loop is Sand plus Water, then Wet Sand on a Shaker, then Gold and Residue routing.
Questions answered
Solve the next blockage.
How do I make Wet Sand in Sandustry?+
Touch Sand and Water together. The official recipe is one Sand plus one Water becoming two Wet Sand pixels.
How do I let Wet Sand through but not Water in Sandustry?+
Do not use a basic Filter as a Water rejection layer. Make Wet Sand upstream, then use the basic Filter only for the solid-material route. Water passes through a basic Filter; Advanced Filter can process Water, but its complete mixed-fluid layout rules are not currently published.
How do I edit a Filter in Sandustry?+
Set a basic Filter to allow one selected solid through or block one selected solid and allow the rest. Use a shallow feed and keep Sand and Water from changing into Wet Sand while crossing the Filter.
What does Wet Sand do in a Shaker?+
Each Wet Sand becomes one Residue and has roughly a 25% chance to also produce one Gold. Gold exits through the Shaker bottom while Residue stays on top and moves slowly sideways.
Why is my Filter not pulling Wet Sand through?+
A tall pile can prevent lower-density pixels from reaching the Filter through denser material. Reduce the pile height, filter dense material first, and avoid making Wet Sand while the material is crossing the Filter.
How do Advanced Filter Walls behave when stacked?+
Vertical Advanced Filter Walls act as a single continuous unit allowing items to fall through instantly. Horizontal arrangements only permit a single output direction.
Evidence notes
Confirmed first. Tested second.
Source Wiki
Wet Sand has density 150 and is created from Sand plus Water; one Sand plus one Water becomes two Wet Sand.
A Shaker always converts Wet Sand into one Residue and has around a 25% chance to drop Gold through its bottom.
Basic Filters allow or block one solid pixel type; Water passes through them. Advanced Filters can process Water and other liquids, but the official Wiki does not publish a complete mixed-fluid layout rule.
The official Wiki recommends filtering the densest pixels first from a pile and warns that a pixel changing type while passing a Filter can become stuck.
Community-tested
In my v0.4.12 test, mixing upstream and keeping the Filter feed shallow was easier to recover than asking a basic Filter to reject Water inside a tall mixed pile.
These are useful player examples, not official specifications.
