- How to get clay in Stop The Tsunami: gather it from material piles and clay deposits near the beach, then carry or haul it to your dam.
- Clay is a mid-tier material: stronger than free blocks, weaker than stone or concrete — use it as dam filler.
- Vehicles speed up farming: the Skid Steer and Excavator move far more clay per trip than walking.
- Farm during the build phase: use the countdown timer between waves to stockpile clay near weak wall sections.
- Upgrade when you can: replace front-face clay with stone or reinforced blocks before late waves hit.
What Is Clay and Why It Matters in Stop The Tsunami
Clay is one of the core building materials in Stop The Tsunami, the Roblox co-op survival game where up to 16 players build and repair a dam against escalating tsunami waves. Clay sits in the middle of the material ladder: it is cheap, easy to gather in large quantities early in a round, and significantly stronger than the basic free block — but it erodes quickly under direct wave pressure.
Think of clay as your bulk filler. The strongest dams use a layered structure: tough materials like stone, brick, or reinforced blocks on the water-facing front layer, and inexpensive clay packed behind them to absorb whatever force leaks through. Because clay is quick to collect and place, it is also the go-to emergency material for plugging breaches mid-wave when you have no time to be picky.
Use clay behind the front face and in the dam's base rows during early waves. Do not rely on it as the water-facing layer in Medium or Hard mode — later waves generate enough pressure to erode clay blocks within seconds of contact.
The table below shows how clay compares to the other building materials in the game:
| Material | Tier | Strength | Cost | Best Use |
|---|---|---|---|---|
| Basic Free Block | C | ★★ | Free | Emergency gap-plugging, first wave only |
| Clay Block | B | ★★★ | Cheap | Dam filler, base rows, quick repairs |
| Wood Block | B | ★★★ | Cheap | Filler, corner support |
| Stone Block | A | ★★★★ | Moderate | Front-face layer, corners |
| Brick Block | A | ★★★★ | Moderate | Front-face layer, mid-game waves |
| Reinforced / Metal Block | S | ★★★★★ | Expensive | Front face and known weak points, late waves |
How to Get Clay: Step-by-Step Farming
Getting clay follows the same core loop as all material gathering in Stop The Tsunami: find a material pile, pick up what you can carry, and deliver it to the construction zone at the valley mouth. Follow these steps to farm clay efficiently from the start of a round.
Locate the clay piles
At the start of the build phase, scan the area around the beach and valley for material spawns. Clay deposits typically sit alongside sand and gravel piles within a short run of the dam site. Mark the closest pile to your wall so you can run repeat trips without wasting time.
Pick up materials
Walk up to the clay pile and press the interact key to pick up a load. On foot you can only carry a small amount per trip, so plan a tight loop between the pile and the wall.
Deliver to the construction zone
Carry the clay to the dam and place it where it does the most good — the back rows of the wall and the base, where thickness matters more than surface hardness.
Upgrade to a vehicle
As soon as you have earned enough cash, buy a Skid Steer or Excavator. Mechanical equipment multiplies how much clay you can move per trip, turning a slow walking loop into a rapid supply line.
Keep a clay stockpile
During the countdown before each wave, park a small stockpile of clay a few tiles behind the dam. When a breach opens mid-wave, you can patch it immediately instead of sprinting back to the piles.
Stop hauling clay once the wave timer hits zero. Standing in front of the dam during a strike is the most common way players die. Get behind the wall and save the repair run for the moment the water recedes.
Best Tools and Vehicles for Clay Farming
Your clay-farming speed scales directly with your equipment. Early in a match you are stuck walking loads one at a time, but cash from survived waves lets you climb the equipment ladder — from a small shovel to full-size construction machines.
On Foot / Shovel
- Slowest option: one small load per trip
- Available from wave 1 at no cost
- Fine for the first dam, painful afterward
Skid Steer
- Early-game workhorse: multiple clay loads per run
- Cheap first vehicle purchase
- Great for continuous supply runs
Excavator / Dump Truck
- Best clay haulers: large capacity per trip
- Higher cash investment, pays off in later rounds
- Keeps pace with late-wave reinforcement demands
| Equipment | Clay per Trip | Speed | Cost | Recommended Wave |
|---|---|---|---|---|
| Shovel (on foot) | Low | Slow | Free | Wave 1–2 |
| Skid Steer | Medium | Moderate | Low | Wave 2–4 |
| Bulldozer | Medium–High | Moderate | Moderate | Wave 3+ |
| Excavator | High | Fast | High | Wave 4+ |
| Dump Truck | Very High | Fast on routes | High | Wave 5+ |
Resist the urge to save for the biggest machine first. A cheap Skid Steer early generates materials — and therefore cash — faster than waiting several waves for an Excavator. Upgrade incrementally as your income allows.
Using Clay Effectively in Your Dam
Collecting clay is only half the job. Where you place it determines whether your dam survives the next wave. Water pressure is highest at the base and on the water-facing surface, so material placement should follow a deliberate pattern rather than a uniform wall.
Recommended dam cross-section using clay:
| Dam Layer | Recommended Material | Why |
|---|---|---|
| Front face (water side) | Stone, brick, or reinforced blocks | Takes direct wave impact; needs high water resistance |
| Middle rows | Clay | Cheap bulk that absorbs leaked pressure |
| Base rows (bottom 2) | Clay + stone mix | Pressure peaks at the bottom; thicken first |
| Back rows | Clay or free blocks | Catches leaks; easy to repair from behind |
| Corners and valley edges | Strongest available | Edge gaps are the #1 cause of dam failure |
Two thinner walls spaced 3–4 tiles apart outperform one giant wall. The front wall takes the impact while clay-packed rows behind it catch leaks — and you can stand in the gap to patch holes mid-wave with spare clay blocks.
Also remember the double-wall and chokepoint principles from strong dam layouts: building at a narrow valley entrance means shorter walls, which means every clay block you haul contributes more total thickness than on a wide beach front.
Clay Farming Checklist:
- Mark the nearest clay pile at the start of each round
- Complete the first full-gap clay wall before wave 1 hits
- Buy a Skid Steer as your first equipment upgrade
- Keep a stockpile of clay 3-4 tiles behind the dam
- Replace front-face clay with stone or better by wave 4
- Reinforce the bottom two rows before adding height
Clay Farming FAQ
Q: How do you get clay in Stop The Tsunami?
Walk up to clay and material piles near the beach and valley during the build phase, press the interact key to pick up a load, and carry it to the dam construction zone. Buying a Skid Steer or Excavator with earned cash lets you haul far more clay per trip than walking.
Q: Is clay good enough for the front of the dam?
Clay is a B-tier material: strong enough for filler and base rows, but it erodes quickly under direct wave pressure. Use stone, brick, or reinforced blocks on the water-facing layer, and pack clay behind them for bulk.
Q: When is the best time to farm clay?
Farm during the calm build phase while the wave countdown is running. Prioritize getting a full-gap wall up first, then keep stockpiling clay behind the dam for emergency repairs. Stop farming the moment the wave strikes.
Q: Should I spend cash on clay or save for vehicles?
Do both in sequence. Spend a little early so your first wall stands, then save for a cheap vehicle like the Skid Steer. Vehicles increase your clay income rate so much that they pay for themselves within a few waves.