diff --git a/src/data/kotlin/ru/dbotthepony/mc/otm/datagen/tags/Tags.kt b/src/data/kotlin/ru/dbotthepony/mc/otm/datagen/tags/Tags.kt
index 2d46e61b2..d9e98c8db 100644
--- a/src/data/kotlin/ru/dbotthepony/mc/otm/datagen/tags/Tags.kt
+++ b/src/data/kotlin/ru/dbotthepony/mc/otm/datagen/tags/Tags.kt
@@ -180,6 +180,23 @@ fun addTags(tagsProvider: TagsProvider) {
 		.add(MRegistry.TRITANIUM_STRIPED_WALL.flatItems)
 		.add(MItems.TRITANIUM_STRIPED_WALL.values)
 
+	tagsProvider.items.Appender(MItemTags.NO_REPLICATION)
+		.add(Items.WRITTEN_BOOK)
+		.add(Tags.Items.ORES)
+		.add(Tags.Items.RAW_MATERIALS)
+		.add(MItems.PILL_ANDROID)
+		.add(MItems.PILL_HUMANE)
+		.add(MItems.PILL_OBLIVION)
+		.add(MItems.QUANTUM_BATTERY)
+		.add(MItems.QUANTUM_CAPACITOR)
+		.add(MItems.QUANTUM_BATTERY_CREATIVE)
+		.add(MItems.ZPM_BATTERY)
+		.add(MItems.PROCEDURAL_BATTERY)
+		.add(MItems.EXOPACK_PROBE)
+		.add(MItems.ExopackUpgrades.INVENTORY_UPGRADE_PROCEDURAL)
+		.add(MItems.ExopackUpgrades.INVENTORY_UPGRADE_WITHER)
+		.add(MItems.ExopackUpgrades.INVENTORY_UPGRADE_ENDER_DRAGON)
+
 	tagsProvider.requiresPickaxe(MBlocks.TRITANIUM_DOOR.values, Tiers.IRON)
 	tagsProvider.requiresPickaxe(MBlocks.TRITANIUM_TRAPDOOR.values, Tiers.IRON)
 	tagsProvider.requiresPickaxe(MBlocks.PAINTER, Tiers.STONE)
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReplicatorBlockEntity.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReplicatorBlockEntity.kt
index 6e50499f5..69fd5f3e0 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReplicatorBlockEntity.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReplicatorBlockEntity.kt
@@ -35,6 +35,7 @@ import ru.dbotthepony.mc.otm.graph.matter.MatterNode
 import ru.dbotthepony.mc.otm.matter.MatterManager
 import ru.dbotthepony.mc.otm.menu.matter.MatterReplicatorMenu
 import ru.dbotthepony.mc.otm.registry.MBlockEntities
+import ru.dbotthepony.mc.otm.registry.MItemTags
 import ru.dbotthepony.mc.otm.registry.MItems
 import java.util.*
 
@@ -168,10 +169,11 @@ class MatterReplicatorBlockEntity(p_155229_: BlockPos, p_155230_: BlockState) :
 		}
 
 		val allocation = matterNode.graph.allocateTask(simulate = false) ?: return JobContainer.observe()
-		val stack = allocation.task.stack(1)
-		val matter = MatterManager.get(stack)
 
-		// ????????
+		val stack = allocation.task.stack(1)
+		if (stack.`is`(MItemTags.NO_REPLICATION)) return JobContainer.failure()
+
+		val matter = MatterManager.get(stack)
 		if (!matter.hasMatterValue) return JobContainer.failure()
 
 		val ticks = matter.complexity
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterScannerBlockEntity.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterScannerBlockEntity.kt
index e87161070..7e55749fa 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterScannerBlockEntity.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterScannerBlockEntity.kt
@@ -27,6 +27,7 @@ import ru.dbotthepony.mc.otm.menu.matter.MatterScannerMenu
 import ru.dbotthepony.mc.otm.registry.MBlockEntities
 import ru.dbotthepony.mc.otm.graph.matter.MatterNode
 import ru.dbotthepony.mc.otm.matter.MatterManager
+import ru.dbotthepony.mc.otm.registry.MItemTags
 import java.util.*
 import kotlin.math.pow
 
@@ -114,7 +115,7 @@ class MatterScannerBlockEntity(p_155229_: BlockPos, p_155230_: BlockState) :
 		}
 
 		val stack = container.getItem(0)
-		if (stack.isEmpty || !MatterManager.canDecompose(stack)) return JobContainer.noItem()
+		if (stack.isEmpty || !MatterManager.canDecompose(stack) || stack.`is`(MItemTags.NO_DECOMPOSING) || stack.`is`(MItemTags.NO_REPLICATION)) return JobContainer.noItem()
 
 		var findState: PatternState? = null
 
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MItemTags.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MItemTags.kt
index d3f941454..08afc394b 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MItemTags.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MItemTags.kt
@@ -80,6 +80,12 @@ object MItemTags {
 	val HARDENED_GLASS_WHITE: TagKey<Item> = ItemTags.create(ResourceLocation("c", "hardened_glass/white"))
 	val HARDENED_GLASS_YELLOW: TagKey<Item> = ItemTags.create(ResourceLocation("c", "hardened_glass/yellow"))
 
-	val MACHINES: TagKey<Item> = ItemTags.create(ResourceLocation(OverdriveThatMatters.MOD_ID, "machines"))
+	val MACHINES: TagKey<Item> = ItemTags.create(modLoc("machines"))
+
+	val NO_DECOMPOSING: TagKey<Item> = ItemTags.create(modLoc("matter/no_decomposing"))
+	val NO_REPLICATION: TagKey<Item> = ItemTags.create(modLoc("matter/no_replication"))
+	val NO_REPAIR: TagKey<Item> = ItemTags.create(modLoc("matter/no_repair"))
+
+	fun modLoc(path: String) : ResourceLocation = ResourceLocation(OverdriveThatMatters.MOD_ID, path)
 }