diff --git a/code/datums/materials/basemats.dm b/code/datums/materials/basemats.dm
index 45e8b211a36..774fab28b28 100644
--- a/code/datums/materials/basemats.dm
+++ b/code/datums/materials/basemats.dm
@@ -180,7 +180,7 @@ Unless you know what you're doing, only use the first three numbers. They're in
 	desc = "Titanium"
 	color = "#b3c0c7"
 	strength_modifier = 1.3
-	categories = list(MAT_CATEGORY_ORE = TRUE, MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE)
+	categories = list(MAT_CATEGORY_ORE = TRUE, MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE, MAT_CATEGORY_ITEM_MATERIAL=TRUE)
 	sheet_type = /obj/item/stack/sheet/mineral/titanium
 	value_per_unit = 0.0625
 	beauty_modifier = 0.05
@@ -212,7 +212,7 @@ Unless you know what you're doing, only use the first three numbers. They're in
 	color = "#caccd9"
 	strength_modifier = 0.85
 	sheet_type = /obj/item/stack/sheet/plastic
-	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE)
+	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE, MAT_CATEGORY_ITEM_MATERIAL=TRUE)
 	value_per_unit = 0.0125
 	beauty_modifier = -0.01
 	armor_modifiers = list(MELEE = 1.5, BULLET = 1.1, LASER = 0.3, ENERGY = 0.5, BOMB = 1, BIO = 1, RAD = 1, FIRE = 1.1, ACID = 1)
@@ -236,7 +236,7 @@ Unless you know what you're doing, only use the first three numbers. They're in
 	color = "#bb8e53"
 	strength_modifier = 0.5
 	sheet_type = /obj/item/stack/sheet/mineral/wood
-	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE)
+	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE, MAT_CATEGORY_ITEM_MATERIAL=TRUE)
 	value_per_unit = 0.01
 	beauty_modifier = 0.1
 	armor_modifiers = list(MELEE = 1.1, BULLET = 1.1, LASER = 0.4, ENERGY = 0.4, BOMB = 1, BIO = 0.2, RAD = 0, FIRE = 0, ACID = 0.3)
@@ -267,7 +267,7 @@ Unless you know what you're doing, only use the first three numbers. They're in
 	desc = "A powerful material made out of magic, I mean science!"
 	color = "#6d7e8e"
 	strength_modifier = 1.5
-	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE)
+	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE, MAT_CATEGORY_ITEM_MATERIAL=TRUE)
 	sheet_type = /obj/item/stack/sheet/mineral/adamantine
 	value_per_unit = 0.25
 	beauty_modifier = 0.4
@@ -282,7 +282,7 @@ Unless you know what you're doing, only use the first three numbers. They're in
 	name = "mythril"
 	desc = "How this even exists is byond me"
 	color = "#f2d5d7"
-	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE)
+	categories = list(MAT_CATEGORY_RIGID = TRUE, MAT_CATEGORY_BASE_RECIPES = TRUE, MAT_CATEGORY_ITEM_MATERIAL=TRUE)
 	sheet_type = /obj/item/stack/sheet/mineral/mythril
 	value_per_unit = 0.75
 	strength_modifier = 1.2