diff --git a/hot-metals/changelog.txt b/hot-metals/changelog.txt
index 58b2471..68d55d0 100644
--- a/hot-metals/changelog.txt
+++ b/hot-metals/changelog.txt
@@ -1,3 +1,10 @@
+---------------------------------------------------------------------------------------------------
+Version: 1.2.1
+Date: 09.01.2025
+  Changes:
+    - Add hot stone bricks and hot concrete (https://mods.factorio.com/mod/hot-metals/discussion/677fdef8d37eef8332fa6c2f)
+    - Biochambers don't generate hot plastic (https://mods.factorio.com/mod/hot-metals/discussion/675af47f1fba71716b2b7f7f)
+---------------------------------------------------------------------------------------------------
 Version: 1.2.0
 Date: 01.01.2025
   Changes:
diff --git a/hot-metals/compatibility/space-age.lua b/hot-metals/compatibility/space-age.lua
index 43cdeee..2cdad45 100644
--- a/hot-metals/compatibility/space-age.lua
+++ b/hot-metals/compatibility/space-age.lua
@@ -20,5 +20,8 @@ table.insert(HotMetals.skipTechUnlocksFor, "pipe-to-ground")
 
 if settings.startup["hot-metals-plastic"].value then
     table.insert(HotMetals.craftingCategories, "chemistry-or-cryogenics")
-    table.insert(HotMetals.craftingCategories, "organic")
+end
+
+if settings.startup["hot-metals-bricks"].value then
+    table.insert(HotMetals.items, "concrete")
 end
\ No newline at end of file
diff --git a/hot-metals/data.lua b/hot-metals/data.lua
index 0010956..1eb128b 100644
--- a/hot-metals/data.lua
+++ b/hot-metals/data.lua
@@ -17,4 +17,8 @@ if settings.startup["hot-metals-plastic"].value then
     end
 end
 
+if settings.startup["hot-metals-bricks"].value then
+    table.insert(HotMetals.items, "stone-brick")
+end
+
 require("compatibility.data")
\ No newline at end of file
diff --git a/hot-metals/graphics/icons/hot-concrete.png b/hot-metals/graphics/icons/hot-concrete.png
new file mode 100644
index 0000000..e848989
Binary files /dev/null and b/hot-metals/graphics/icons/hot-concrete.png differ
diff --git a/hot-metals/graphics/icons/hot-stone-brick.png b/hot-metals/graphics/icons/hot-stone-brick.png
new file mode 100644
index 0000000..cb8eba9
Binary files /dev/null and b/hot-metals/graphics/icons/hot-stone-brick.png differ
diff --git a/hot-metals/locale/en/strings.cfg b/hot-metals/locale/en/strings.cfg
index b258bb1..748d518 100644
--- a/hot-metals/locale/en/strings.cfg
+++ b/hot-metals/locale/en/strings.cfg
@@ -4,7 +4,9 @@ hot=Hot
 [mod-setting-name]
 hot-metals-time=Cooldown time
 hot-metals-plastic=Add hot plastic
+hot-metals-bricks=Add hot stone bricks and concrete
 
 [mod-setting-description]
 hot-metals-time=The time in seconds for a hot item to cool down.
-hot-metals-plastic=Although the temperature of hot plastic is way lower compared to metals, you might want to have a hot variant anyway.
\ No newline at end of file
+hot-metals-plastic=Although the temperature of hot plastic is way lower compared to metals, you might want to have a hot variant anyway.
+hot-metals-bricks=Stone bricks and concrete are not included by default. If you like to play with hot variants, you can enable this option.
\ No newline at end of file
diff --git a/hot-metals/settings.lua b/hot-metals/settings.lua
index ea3e467..298a3fa 100644
--- a/hot-metals/settings.lua
+++ b/hot-metals/settings.lua
@@ -12,5 +12,12 @@ data:extend({
         setting_type = "startup",
         default_value = false,
         order = "b"
-    }
+    },
+    {
+            type = "bool-setting",
+            name = "hot-metals-bricks",
+            setting_type = "startup",
+            default_value = false,
+            order = "c"
+        }
 })
diff --git a/sources/hot-concrete.afphoto b/sources/hot-concrete.afphoto
new file mode 100644
index 0000000..cf7d675
Binary files /dev/null and b/sources/hot-concrete.afphoto differ
diff --git a/sources/hot-stone-brick.afphoto b/sources/hot-stone-brick.afphoto
new file mode 100644
index 0000000..e799053
Binary files /dev/null and b/sources/hot-stone-brick.afphoto differ