diff --git a/src/main/java/gregtech/api/enums/material/FluidMaterial.java b/src/main/java/gregtech/api/enums/material/FluidMaterial.java
index 8de9f20d..7cd8968f 100644
--- a/src/main/java/gregtech/api/enums/material/FluidMaterial.java
+++ b/src/main/java/gregtech/api/enums/material/FluidMaterial.java
@@ -4,6 +4,23 @@ import net.minecraftforge.fluids.FluidStack;
 
 public interface FluidMaterial {
 
+    final class MatFlags {
+
+        /**
+         * Add to fluid material to have it's cell generated
+         */
+        public static final int GENERATE_CELL = Material.MatFlags.createFlag(3);
+
+        /**
+         * Add to fluid material to have plasma fluid generated
+         */
+        public static final int GENERATE_PLASMA = Material.MatFlags.createFlag(4);
+
+
+
+    }
+
+
     default boolean hasFluid() {
         return getFluid(1) != null;
     }
diff --git a/src/main/java/gregtech/api/enums/material/builder/DustMaterialBuilder.java b/src/main/java/gregtech/api/enums/material/builder/DustMaterialBuilder.java
index f6fc9856..e0591881 100644
--- a/src/main/java/gregtech/api/enums/material/builder/DustMaterialBuilder.java
+++ b/src/main/java/gregtech/api/enums/material/builder/DustMaterialBuilder.java
@@ -156,24 +156,18 @@ public class DustMaterialBuilder<T extends DustMaterial, Self extends DustMateri
 
     @Override
     protected T build() {
-        //java, fuck off, please
-        ImmutableList<MaterialStack> materialStacks1 = ImmutableList.copyOf(materialCompounds);
-        ImmutableList<SubTag> subTags1 = ImmutableList.copyOf(subTags);
-        ImmutableList<Material> reRegistrations = ImmutableList.of();
-        ImmutableList<DustMaterial> byProducts = ImmutableList.copyOf(oreByProducts);
-
         return (T) new DustMaterial(
                 defaultLocalizedName,
                 rgbColor,
                 iconSet,
-                materialStacks1,
-                reRegistrations,
-                subTags1,
+                ImmutableList.copyOf(materialCompounds),
+                ImmutableList.copyOf(oreReRegistrations),
+                ImmutableList.copyOf(subTags),
                 materialGenerationBits,
                 densityMultiplier,
                 directElement,
                 oreValue,
-                byProducts,
+                ImmutableList.copyOf(oreByProducts),
                 oreMultiplier,
                 byProductMultiplier,
                 smeltingMultiplier,
diff --git a/src/main/java/gregtech/api/enums/material/builder/FluidMaterialBuilder.java b/src/main/java/gregtech/api/enums/material/builder/FluidMaterialBuilder.java
new file mode 100644
index 00000000..0b132b50
--- /dev/null
+++ b/src/main/java/gregtech/api/enums/material/builder/FluidMaterialBuilder.java
@@ -0,0 +1,27 @@
+package gregtech.api.enums.material.builder;
+
+import com.google.common.collect.ImmutableList;
+import gregtech.api.enums.material.types.FluidMaterialType;
+
+public class FluidMaterialBuilder<T extends FluidMaterialType, Self extends FluidMaterialBuilder<T, Self>> extends MaterialBuilder<T, Self> implements IFluidMaterialBuilder<T, Self> {
+
+    public FluidMaterialBuilder(String name, String defaultLocalizedName) {
+        super(name, defaultLocalizedName);
+    }
+
+    @Override
+    protected T build() {
+        return (T) new FluidMaterialType(
+                defaultLocalizedName,
+                rgbColor,
+                iconSet,
+                ImmutableList.copyOf(materialCompounds),
+                ImmutableList.copyOf(oreReRegistrations),
+                ImmutableList.copyOf(subTags),
+                materialGenerationBits,
+                densityMultiplier,
+                directElement
+        );
+    }
+
+}
diff --git a/src/main/java/gregtech/api/enums/material/builder/IFluidMaterialBuilder.java b/src/main/java/gregtech/api/enums/material/builder/IFluidMaterialBuilder.java
new file mode 100644
index 00000000..4a18113a
--- /dev/null
+++ b/src/main/java/gregtech/api/enums/material/builder/IFluidMaterialBuilder.java
@@ -0,0 +1,26 @@
+package gregtech.api.enums.material.builder;
+
+import gregtech.api.enums.material.FluidMaterial;
+import gregtech.api.enums.material.Material;
+
+//should be T extends FluidMaterial, but it is interface
+public interface IFluidMaterialBuilder<T extends Material, Self extends MaterialBuilder<T, Self>> {
+
+    /**
+     * Enables a cell meta-item generation for this material
+     */
+    default Self enableCell() {
+        ((Self) this).materialGenerationBits |= FluidMaterial.MatFlags.GENERATE_CELL;
+        return (Self) this;
+    }
+
+    /**
+     * Enables plasma fluid generation for this material
+     *
+     */
+    default Self enablePlasma() {
+        ((Self) this).materialGenerationBits |= FluidMaterial.MatFlags.GENERATE_PLASMA;
+        return (Self) this;
+    }
+
+}
diff --git a/src/main/java/gregtech/api/enums/material/builder/MaterialBuilder.java b/src/main/java/gregtech/api/enums/material/builder/MaterialBuilder.java
index 3d860e08..ba9d529a 100644
--- a/src/main/java/gregtech/api/enums/material/builder/MaterialBuilder.java
+++ b/src/main/java/gregtech/api/enums/material/builder/MaterialBuilder.java
@@ -6,6 +6,7 @@ import gregtech.api.enums.Element;
 import gregtech.api.enums.SubTag;
 import gregtech.api.enums.material.Material;
 import gregtech.api.enums.material.MaterialIconSet;
+import gregtech.api.enums.material.types.MarkerMaterial;
 import gregtech.api.objects.MaterialStack;
 
 import java.util.ArrayList;
@@ -21,6 +22,7 @@ public abstract class MaterialBuilder<T extends Material, Self extends MaterialB
     protected float densityMultiplier = 1.0f;
     protected Element directElement = null;
     protected ArrayList<MaterialStack> materialCompounds = new ArrayList<>();
+    protected ArrayList<Material> oreReRegistrations = new ArrayList<>();
     protected int metaItemSubId = -1;
 
     public MaterialBuilder(String name, String defaultLocalizedName) {
@@ -28,45 +30,96 @@ public abstract class MaterialBuilder<T extends Material, Self extends MaterialB
         this.defaultLocalizedName = defaultLocalizedName;
     }
 
+    /**
+     * Assigns a meta item sub id to material
+     * Makes meta-items generate for this material if desired
+     * @param metaItemSubId meta item sub id
+     * @return this
+     */
     public Self metaItemSubId(int metaItemSubId) {
         this.metaItemSubId = metaItemSubId;
         return (Self) this;
     }
 
+    /**
+     * Assigns material to a group of marker material
+     * @param markerMaterial marker
+     * @return this
+     */
+    public Self reRegisterInto(MarkerMaterial markerMaterial) {
+        this.oreReRegistrations.add(markerMaterial);
+        return (Self) this;
+    }
+
+    /**
+     * Enables generation of centrifuge recipes like:
+     * X This Material Dust + N Cells = material components dusts/in cells
+     * @return this
+     */
     public Self enableDecompositionByCentrifuging() {
         this.materialGenerationBits |= Material.MatFlags.GENERATE_DECOMPOSITION_RECIPES;
         this.materialGenerationBits |= Material.MatFlags.DECOMPOSITION_BY_CENTRIFUGING;
         return (Self) this;
     }
 
+    /**
+     * Enables generation of electrolyzer recipes like:
+     * X This Material Dust + N Cells = material components dusts/in cells
+     * @return this
+     */
     public Self enableDecompositionByElectrolyzing() {
         this.materialGenerationBits |= Material.MatFlags.GENERATE_DECOMPOSITION_RECIPES;
         this.materialGenerationBits |= Material.MatFlags.DECOMPOSITION_BY_ELECTROLYZING;
         return (Self) this;
     }
 
+    /**
+     * Marks this material as magical.
+     * Doesn't have any actual effect on material
+     * @return this
+     */
     public Self markMagical() {
         this.subTags.add(Material.MatFlags.MAGICAL);
         return (Self) this;
     }
 
+    /**
+     * Marks material as explosive.
+     * Used in some recipes generation
+     * @return this
+     */
     public Self markExplosive() {
         this.subTags.add(Material.MatFlags.EXPLOSIVE);
         return (Self) this;
     }
 
+    /**
+     * Marks material as totally unburnable (cannot catch fire at all)
+     * Used in some recipes generation
+     * @return this
+     */
     public Self markUnburnable() {
         Preconditions.checkState(!subTags.contains(Material.MatFlags.FLAMMABLE), "Cannot mark flammable material as unburnable!");
         this.subTags.add(Material.MatFlags.UNBURNABLE);
         return (Self) this;
     }
 
+    /**
+     * Marks material as flammable (can catch fire from source)
+     * Used in some recipes generation
+     * @return this
+     */
     public Self markFlammable() {
         Preconditions.checkState(!subTags.contains(Material.MatFlags.UNBURNABLE), "Cannot mark unburnable material as flammable!");
         this.subTags.add(Material.MatFlags.FLAMMABLE);
         return (Self) this;
     }
 
+    /**
+     * Marks material as burning itself (can ignite things itself)
+     * Used in some recipes generation
+     * @return this
+     */
     public Self markBurning() {
         Preconditions.checkState(!subTags.contains(Material.MatFlags.UNBURNABLE), "Cannot mark unburnable material as burning!");
         this.subTags.add(Material.MatFlags.FLAMMABLE);
@@ -74,26 +127,51 @@ public abstract class MaterialBuilder<T extends Material, Self extends MaterialB
         return (Self) this;
     }
 
+    /**
+     * Disables unification for this material
+     * @return this
+     */
     public Self disableUnification() {
         this.subTags.add(Material.MatFlags.NO_UNIFICATION);
         return (Self) this;
     }
 
+    /**
+     * Disables recycling for this material
+     * @return this
+     */
     public Self disableRecycling() {
         this.subTags.add(Material.MatFlags.NO_RECYCLING);
         return (Self) this;
     }
 
+    /**
+     * Sets a color of a material
+     * @param color RGB color (0xRRGGBB)
+     * @return this
+     */
     public Self color(int color) {
         this.rgbColor = color;
         return (Self) this;
     }
 
+    /**
+     * Sets a density multiplier for material
+     * Affects cost of replicating material trough Replicator (and total material's mass)
+     * @param densityMultiplier density multiplier
+     * @return this
+     */
     public Self densityMultiplier(float densityMultiplier) {
         this.densityMultiplier = densityMultiplier;
         return (Self) this;
     }
 
+    /**
+     * Specifies direct element from which this material consist
+     * Not compatible with compounds(...) under this method
+     * @param element direct element
+     * @return this
+     */
     public Self directElement(Element element) {
         Preconditions.checkNotNull(element);
         Preconditions.checkState(materialCompounds.isEmpty(), "Cannot specify direct element for compound material!");
@@ -101,6 +179,12 @@ public abstract class MaterialBuilder<T extends Material, Self extends MaterialB
         return (Self) this;
     }
 
+    /**
+     * Specifies sub-materials (components) of this material
+     * Not compatible with directElement(Element) above
+     * @param compounds material components
+     * @return this
+     */
     public Self compounds(MaterialStack... compounds) {
         Preconditions.checkNotNull(compounds);
         Preconditions.checkArgument(compounds.length > 0, "Cannot add empty compounds array!");
@@ -109,13 +193,23 @@ public abstract class MaterialBuilder<T extends Material, Self extends MaterialB
         return (Self) this;
     }
 
+    /**
+     * Builds actual material instance
+     * Registration is done by buildAndRegister(), only build, not register.
+     * @return built material
+     */
     protected abstract T build();
 
+    /**
+     * Builds and registers material
+     * @return material
+     */
     public final T buildAndRegister() {
         T material = build();
         if(metaItemSubId > 0) {
             Material.MATERIAL_REGISTRY.register(metaItemSubId, name, material);
         } else Material.MATERIAL_REGISTRY.putObject(name, material);
+        return material;
     }
 
 }
diff --git a/src/main/java/gregtech/api/enums/material/types/FluidMaterialType.java b/src/main/java/gregtech/api/enums/material/types/FluidMaterialType.java
index f8678edf..849857a0 100644
--- a/src/main/java/gregtech/api/enums/material/types/FluidMaterialType.java
+++ b/src/main/java/gregtech/api/enums/material/types/FluidMaterialType.java
@@ -1,6 +1,7 @@
 package gregtech.api.enums.material.types;
 
 import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
 import gregtech.api.enums.Element;
 import gregtech.api.enums.SubTag;
 import gregtech.api.enums.material.Material;
@@ -16,7 +17,7 @@ public class FluidMaterialType extends Material implements gregtech.api.enums.ma
     private Fluid materialFluid;
     private Fluid materialPlasma;
 
-    public FluidMaterialType(String defaultLocalName, int materialRGB, MaterialIconSet materialIconSet, List<MaterialStack> materialComponents, List<Material> oreReRegistrations, List<SubTag> subTags, int materialGenerationFlags, float densityMultiplier, Element element) {
+    public FluidMaterialType(String defaultLocalName, int materialRGB, MaterialIconSet materialIconSet, ImmutableList<MaterialStack> materialComponents, ImmutableList<Material> oreReRegistrations, ImmutableList<SubTag> subTags, int materialGenerationFlags, float densityMultiplier, Element element) {
         super(defaultLocalName, materialRGB, materialIconSet, materialComponents, oreReRegistrations, subTags, materialGenerationFlags, densityMultiplier, element);
     }
 
diff --git a/src/main/java/gregtech/api/enums/material/types/MarkerMaterial.java b/src/main/java/gregtech/api/enums/material/types/MarkerMaterial.java
new file mode 100644
index 00000000..24592fce
--- /dev/null
+++ b/src/main/java/gregtech/api/enums/material/types/MarkerMaterial.java
@@ -0,0 +1,28 @@
+package gregtech.api.enums.material.types;
+
+import com.google.common.collect.ImmutableList;
+import gregtech.api.enums.SubTag;
+import gregtech.api.enums.material.Material;
+import gregtech.api.enums.material.MaterialIconSet;
+import gregtech.api.objects.MaterialStack;
+
+/**
+ * MarkerMaterial is type of material used for generic things like material re-registration and use in recipes
+ * Marker material cannot be used to generate any meta items
+ * Marker material can be used only for marking other materials (re-registeoring) equal to it and then using it in recipes or in getting items v
+ */
+public final class MarkerMaterial extends Material {
+
+    public MarkerMaterial(String defaultLocalName, int materialRGB) {
+        super(defaultLocalName,
+                materialRGB,
+                MaterialIconSet.NONE,
+                ImmutableList.of(),
+                ImmutableList.of(),
+                ImmutableList.of(),
+                0,
+                1.0f,
+                null);
+    }
+
+}