diff --git a/BauSystem_Main/src/BauSystem.properties b/BauSystem_Main/src/BauSystem.properties
index 19b53de7..903ebb5a 100644
--- a/BauSystem_Main/src/BauSystem.properties
+++ b/BauSystem_Main/src/BauSystem.properties
@@ -918,6 +918,7 @@ MATERIAL_SEARCH_INTERACTEABLE=§eInteractable
 MATERIAL_SEARCH_FLAMMABLE=§eFlammable
 MATERIAL_SEARCH_BURNABLE=§eBurnable
 MATERIAL_SEARCH_WATERLOGGABLE=§eWaterloggable
+MATERIAL_SEARCH_UNMOVEABLE=§eUnmoveable
 MATERIAL_SEARCH_BLASTRESISTANCE=§eBlast resistance
 MATERIAL_SEARCH_VALUE=§8: §e{0}
 MATERIAL_BLAST_RESISTANCE=§8- §eBlast resistance§8: §7{0}
@@ -932,6 +933,7 @@ MATERIAL_INTERACTABLE=§8- §eInteractable block
 MATERIAL_FLAMMABLE=§8- §eFlammable block
 MATERIAL_BURNABLE=§8- §eBurnable block
 MATERIAL_WATERLOGGABLE=§8- §eWaterloggable block
+MATERIAL_UNMOVABLE=§8- §eUnmovable block
 # Redstonetester
 RT_HELP=§8/§eredstonetester §8-§7 Gives you the redstone tester
 RT_GIVEN=§7Measure the time between activation of components
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialCommand.java b/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialCommand.java
index 3fe740fe..dd221bae 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialCommand.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialCommand.java
@@ -63,6 +63,7 @@ public class MaterialCommand extends SWCommand implements Listener {
         SearchType flammable = SearchType.IGNORE;
         SearchType burnable = SearchType.IGNORE;
         SearchType waterloggable = SearchType.IGNORE;
+        SearchType unmoveable = SearchType.IGNORE;
 
         String blastResistance = ">=0";
         String name = "";
@@ -110,6 +111,7 @@ public class MaterialCommand extends SWCommand implements Listener {
         elements.put("-flammable", (search, searchType) -> search.flammable = searchType);
         elements.put("-burnable", (search, searchType) -> search.burnable = searchType);
         elements.put("-waterloggable", (search, searchType) -> search.waterloggable = searchType);
+        elements.put("-unmoveable", (search, searchType) -> search.unmoveable = searchType);
     }
 
     @Register
@@ -235,7 +237,11 @@ public class MaterialCommand extends SWCommand implements Listener {
             search.waterloggable = search.waterloggable.next();
             searchGUI(p);
         }));
-        swInventory.setItem(30, new SWItem(Material.NETHER_BRICK, BauSystem.MESSAGE.parse("MATERIAL_SEARCH_BLASTRESISTANCE", p) + BauSystem.MESSAGE.parse("MATERIAL_SEARCH_VALUE", p, search.blastResistance), clickType -> {
+        swInventory.setItem(29, new SWItem(Material.PISTON, BauSystem.MESSAGE.parse("MATERIAL_SEARCH_UNMOVEABLE", p) + BauSystem.MESSAGE.parse("MATERIAL_SEARCH_VALUE", p, BauSystem.MESSAGE.parse(search.unmoveable.getChatValue(), p)), clickType -> {
+            search.unmoveable = search.unmoveable.next();
+            searchGUI(p);
+        }));
+        swInventory.setItem(34, new SWItem(Material.NETHER_BRICK, BauSystem.MESSAGE.parse("MATERIAL_SEARCH_BLASTRESISTANCE", p) + BauSystem.MESSAGE.parse("MATERIAL_SEARCH_VALUE", p, search.blastResistance), clickType -> {
             SWAnvilInv swAnvilInv = new SWAnvilInv(p, BauSystem.MESSAGE.parse("MATERIAL_SEARCH_BLASTRESISTANCE", p), search.blastResistance);
             swAnvilInv.setCallback(s -> {
                 if (s.isEmpty() || s.matches("((([><]=?)|!|=)\\d+(\\.|,\\d+)?)( ((([><]=?)|!|=)\\d+(\\.|,\\d+)?))*")) {
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialLazyInit.java b/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialLazyInit.java
index 05732896..8beb38b1 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialLazyInit.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/util/MaterialLazyInit.java
@@ -22,7 +22,11 @@ package de.steamwar.bausystem.features.util;
 import de.steamwar.bausystem.BauSystem;
 import de.steamwar.inventory.SWItem;
 import de.steamwar.inventory.SWListInv;
+import org.bukkit.Bukkit;
 import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.PistonMoveReaction;
+import org.bukkit.block.TileState;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.Waterlogged;
 import org.bukkit.entity.Player;
@@ -62,6 +66,7 @@ public class MaterialLazyInit {
         private boolean flammable;
         private boolean burnable;
         private boolean waterloggable;
+        private boolean unmoveable;
 
         public MaterialData(Material material) {
             this.originalMaterial = material;
@@ -78,6 +83,11 @@ public class MaterialLazyInit {
             burnable = material.isBurnable();
             BlockData blockData = material.createBlockData();
             waterloggable = blockData instanceof Waterlogged;
+            if (material.isBlock()) {
+                Block block = Bukkit.getWorlds().get(0).getBlockAt(0, 0, 0);
+                block.setType(material);
+                unmoveable = block.getPistonMoveReaction() == PistonMoveReaction.BLOCK || block.getPistonMoveReaction() == PistonMoveReaction.IGNORE || block.getState() instanceof TileState;
+            }
 
             if (material.isItem() && material != Material.AIR) {
                 this.material = material;
@@ -115,6 +125,9 @@ public class MaterialLazyInit {
             if (waterloggable) {
                 lore.add(BauSystem.MESSAGE.parse("MATERIAL_WATERLOGGABLE", p));
             }
+            if (unmoveable) {
+                lore.add(BauSystem.MESSAGE.parse("MATERIAL_UNMOVABLE", p));
+            }
             return new SWListInv.SWListEntry<>(new SWItem(material, "§e" + name, lore, false, clickType -> {
             }), originalMaterial);
         }
@@ -129,6 +142,7 @@ public class MaterialLazyInit {
             result &= search.flammable.test(flammable);
             result &= search.burnable.test(burnable);
             result &= search.waterloggable.test(waterloggable);
+            result &= search.unmoveable.test(unmoveable);
             if (!result) {
                 return false;
             }