diff --git a/code/__DEFINES/materials/dynamics.dm b/code/__DEFINES/materials/dynamics.dm
index ddaaa0563bd1..97da7fbe2391 100644
--- a/code/__DEFINES/materials/dynamics.dm
+++ b/code/__DEFINES/materials/dynamics.dm
@@ -4,7 +4,7 @@
 //* Significance; This is how much material is in something
 
 /// used for shards
-#define MATERIAL_SIGNIFICANCE_SHARD 2.5
+#define MATERIAL_SIGNIFICANCE_SHARD 3.5
 /// baseline significance of material calculations done on material-side / default computations
 #define MATERIAL_SIGNIFICANCE_BASELINE 10
 
@@ -12,8 +12,12 @@
 #define MATERIAL_SIGNIFICANCE_WEAPON_MEDIUM 10
 #define MATERIAL_SIGNIFICANCE_WEAPON_HEAVY 12.5
 
+#define MATERIAL_SIGNIFICANCE_ARMOR_LIGHT 8.5
+#define MATERIAL_SIGNIFICANCE_ARMOR_MEDIUM 10
+#define MATERIAL_SIGNIFICANCE_ARMOR_HEAVY 12.5
+
 /// used for most doors
-#define MATERIAL_SIGNIFICANCE_DOOR 15
+#define MATERIAL_SIGNIFICANCE_DOOR 20
 /// significance used for normal wall layer
 #define MATERIAL_SIGNIFICANCE_WALL 20
 /// significance used for reinforcing wall layer
diff --git a/code/game/atoms/defense.dm b/code/game/atoms/defense.dm
index 3ed53164a4cc..b0f1c8037122 100644
--- a/code/game/atoms/defense.dm
+++ b/code/game/atoms/defense.dm
@@ -436,7 +436,13 @@
  */
 /atom/proc/fetch_armor()
 	RETURN_TYPE(/datum/armor)
-	return armor || (armor = fetch_armor_struct(armor_type))
+	return armor || (armor = generate_armor())
+
+/**
+ * get default armor datum
+ */
+/atom/proc/generate_armor()
+	return fetch_armor_struct(armor_type)
 
 /**
  * calculates the resulting damage from an attack, taking into account our armor and soak
diff --git a/code/modules/materials/dynamics.dm b/code/modules/materials/dynamics.dm
index 7e1351ae75c1..c3a022f2ef8a 100644
--- a/code/modules/materials/dynamics.dm
+++ b/code/modules/materials/dynamics.dm
@@ -13,8 +13,49 @@
  * @return /datum/armor instance
  */
 /datum/material/proc/create_armor(significance = MATERIAL_SIGNIFICANCE_BASELINE, mob_armor)
-	#warn params
-	#warn impl - this requires caching
+	var/cache_key = "[significance]_[!!mob_armor]"
+	if(!isnull(armor_cache[cache_key]))
+		return armor_cache[cache_key]
+
+	//! Not even Desmos will save you now. !//
+	// absorbing kinetic energy
+	var/kinetic_damping = toughness * ((density ** 0.5) * (1 / 3))
+	// stopping kinetic penetrators
+	var/kinetic_hardness = hardness * ((density ** 0.5) * (1 / 8) + 0.7)
+	// absorbing energy blasts
+	var/ablation_damping =
+	// spreading energy blasts from going through
+	var/ablation_diffusion =
+	// exotic 'energy' armor
+	var/exotic_absorption =
+	// bomb values : from kinetic damping and hardness
+	var/direct_bomb =
+	// direct values
+	// todo: integrate significance
+	var/direct_bio = relative_permeability > 1? -relative_permeability : relative_permeability
+	// todo: integrate significance
+	var/direct_acid = relative_reactivity > 1? -relative_reactivity : relative_reactivity
+	// todo: integrate significance
+	var/direct_fire = relative_reactivity > 1? -relative_reactivity : relative_reactivity
+	var/direct_rad = (density * (1 / 16))**2 * ((MATERIAL_SIGNIFICANCE_BASELINE + (significance - MATERIAL_SIGNIFICANCE_BASELINE)) * 0.1)
+	#warn FUCK
+	// we don't allow deflection for now
+	return (armor_cache = fetch_armor_struct(list(
+		ARMOR_MELEE = ,
+		ARMOR_MELEE_TIER = ,
+		ARMOR_MELEE_SOAK = ,
+		ARMOR_BULLET = ,
+		ARMOR_BULLET_TIER = ,
+		ARMOR_BULLET_SOAK = ,
+		ARMOR_LASER = ,
+		ARMOR_LASER_TIER = ,
+		ARMOR_LASER_SOAK = ,
+		ARMOR_BOMB = direct_bomb,
+		ARMOR_BIO = direct_bio,
+		ARMOR_ACID = direct_acid,
+		ARMOR_FIRE = direct_fire,
+		ARMOR_RAD = direct_rad,
+	)))
 
 /**
  * combines multiple material armors into one
diff --git a/code/modules/materials/material.dm b/code/modules/materials/material.dm
index d4e2d3b44d7f..542626d2c3ae 100644
--- a/code/modules/materials/material.dm
+++ b/code/modules/materials/material.dm
@@ -56,7 +56,7 @@
 	var/pass_stack_colors = FALSE
 
 	//* Armor
-	/// caching of armor. text2num(significance) = armor datum instance
+	/// caching of armor. text2num(significance)_[mob_armor? 1 : 0] = armor datum instance
 	var/tmp/list/armor_cache = list()
 
 	//* Attacks
@@ -107,6 +107,8 @@
 	/// * impacts radiation armor (major)
 	/// * impacts bomb armor
 	/// * impacts blunt / crush damage
+	/// * impacts sharp / blade damage (minor)
+	/// * impacts kinetic damage resistance (minor)
 	var/density = 8 * 1
 	/// weight multiplier - allowing for materials that behave like a high-density material but are light
 	/// * basically, low values = high density stats without the penalties from weight
diff --git a/code/modules/projectiles/guns/projectile/rocket.dm b/code/modules/projectiles/guns/projectile/rocket.dm
index f42300dd3a86..d4c5724ef69c 100644
--- a/code/modules/projectiles/guns/projectile/rocket.dm
+++ b/code/modules/projectiles/guns/projectile/rocket.dm
@@ -176,7 +176,7 @@
 
 /obj/item/gun/ballistic/rocket/tyrmalin/attackby(var/obj/item/A as obj, mob/user as mob)
 	. = ..()
-	if(istype(A, /obj/item/stack/material) && A.get_material_name() == MAT_PLASTEEL)
+	if(A.is_material_stack_of(/datum/material/plasteel))
 		var/obj/item/stack/material/M = A
 		if(M.use(1))
 			var/obj/item/tyrmalin_rocket_assembly/R = new /obj/item/tyrmalin_rocket_assembly(get_turf(src))
diff --git a/code/modules/species/xenomorphs/alien_powers.dm b/code/modules/species/xenomorphs/alien_powers.dm
index 6d15c0a63096..c913fe96d783 100644
--- a/code/modules/species/xenomorphs/alien_powers.dm
+++ b/code/modules/species/xenomorphs/alien_powers.dm
@@ -166,7 +166,7 @@
 	else
 		if(istype(O, /turf/simulated/wall))
 			var/turf/simulated/wall/W = O
-			if(W.material.flags & MATERIAL_UNMELTABLE)
+			if(W.material_outer.material_flags & MATERIAL_FLAG_UNMELTABLE)
 				cannot_melt = 1
 		else if(istype(O, /turf/simulated/floor))
 /*			var/turf/simulated/floor/F = O							//Turfs are qdel'd to space (Even asteroid tiles), will need to be touched by someone smarter than myself. -Mech