diff --git a/code/game/machinery/doors/airlock.dm b/code/game/machinery/doors/airlock.dm
index 32a9a4454f6..d3d339cf546 100644
--- a/code/game/machinery/doors/airlock.dm
+++ b/code/game/machinery/doors/airlock.dm
@@ -34,6 +34,8 @@
 
 #define AIRLOCK_INTEGRITY_N			 300 // Normal airlock integrity
 #define AIRLOCK_INTEGRITY_MULTIPLIER 1.5 // How much reinforced doors health increases
+/// How much extra health airlocks get when braced with a seal
+#define AIRLOCK_SEAL_MULTIPLIER		 2
 #define AIRLOCK_DAMAGE_DEFLECTION_N  21  // Normal airlock damage deflection
 #define AIRLOCK_DAMAGE_DEFLECTION_R  30  // Reinforced airlock damage deflection
 
@@ -70,6 +72,8 @@
 	var/obj/item/electronics/airlock/electronics
 	COOLDOWN_DECLARE(shockCooldown)
 	var/obj/item/note //Any papers pinned to the airlock
+	/// The seal on the airlock
+	var/obj/item/seal
 	var/detonated = FALSE
 	var/abandoned = FALSE
 	var/doorOpen = 'sound/machines/airlock.ogg'
@@ -294,6 +298,7 @@
 		for(var/obj/machinery/door_buttons/D in GLOB.machines)
 			D.removeMe(src)
 	QDEL_NULL(note)
+	QDEL_NULL(seal)
 	for(var/datum/atom_hud/data/diagnostic/diag_hud in GLOB.huds)
 		diag_hud.remove_from_hud(src)
 	return ..()
@@ -302,6 +307,9 @@
 	if(A == note)
 		note = null
 		update_icon()
+	if(A == seal)
+		seal = null
+		update_icon()
 
 /obj/machinery/door/airlock/bumpopen(mob/living/user) //Airlocks now zap you when you 'bump' them open when they're electrified. --NeoFite
 	if(!issilicon(usr))
@@ -431,6 +439,7 @@
 	var/mutable_appearance/damag_overlay
 	var/mutable_appearance/sparks_overlay
 	var/mutable_appearance/note_overlay
+	var/mutable_appearance/seal_overlay
 	var/notetype = note_type()
 
 	switch(state)
@@ -447,6 +456,8 @@
 					panel_overlay = get_airlock_overlay("panel_closed", overlays_file)
 			if(welded)
 				weld_overlay = get_airlock_overlay("welded", overlays_file)
+			if(seal)
+				seal_overlay = get_airlock_overlay("sealed", overlays_file)
 			if(obj_integrity < integrity_failure * max_integrity)
 				damag_overlay = get_airlock_overlay("sparks_broken", overlays_file)
 			else if(obj_integrity < (0.75 * max_integrity))
@@ -478,6 +489,8 @@
 				damag_overlay = get_airlock_overlay("sparks_damaged", overlays_file)
 			if(welded)
 				weld_overlay = get_airlock_overlay("welded", overlays_file)
+			if(seal)
+				seal_overlay = get_airlock_overlay("sealed", overlays_file)
 			lights_overlay = get_airlock_overlay("lights_denied", overlays_file)
 			if(note)
 				note_overlay = get_airlock_overlay(notetype, note_overlay_file)
@@ -500,6 +513,8 @@
 				damag_overlay = get_airlock_overlay("sparks_damaged", overlays_file)
 			if(welded)
 				weld_overlay = get_airlock_overlay("welded", overlays_file)
+			if(seal)
+				seal_overlay = get_airlock_overlay("sealed", overlays_file)
 			if(note)
 				note_overlay = get_airlock_overlay(notetype, note_overlay_file)
 
@@ -560,6 +575,7 @@
 	add_overlay(sparks_overlay)
 	add_overlay(damag_overlay)
 	add_overlay(note_overlay)
+	add_overlay(seal_overlay)
 	check_unres()
 
 /proc/get_airlock_overlay(icon_state, icon_file)
@@ -618,7 +634,8 @@
 		else
 			. += "There's a [note.name] pinned to the front..."
 			. += note.examine(user)
-
+	if(seal)
+		. += "It's been braced with a pneumatic seal."
 	if(panel_open)
 		switch(security_level)
 			if(AIRLOCK_SECURITY_NONE)
@@ -813,7 +830,7 @@
 						user.visible_message("<span class='notice'>[user] reinforces \the [src] with plasteel.</span>",
 											"<span class='notice'>You reinforce \the [src] with plasteel.</span>")
 						security_level = AIRLOCK_SECURITY_PLASTEEL
-						modify_max_integrity(normal_integrity * AIRLOCK_INTEGRITY_MULTIPLIER)
+						modify_max_integrity(max_integrity * AIRLOCK_INTEGRITY_MULTIPLIER)
 						damage_deflection = AIRLOCK_DAMAGE_DEFLECTION_R
 						update_icon()
 					return
@@ -844,7 +861,7 @@
 						user.visible_message("<span class='notice'>[user] remove \the [src]'s shielding.</span>",
 											"<span class='notice'>You remove \the [src]'s inner shielding.</span>")
 						security_level = AIRLOCK_SECURITY_NONE
-						modify_max_integrity(normal_integrity)
+						modify_max_integrity(max_integrity / AIRLOCK_INTEGRITY_MULTIPLIER)
 						damage_deflection = AIRLOCK_DAMAGE_DEFLECTION_N
 						spawn_atom_to_turf(/obj/item/stack/sheet/plasteel, user.loc, 1)
 						update_icon()
@@ -922,6 +939,33 @@
 		cable.plugin(src, user)
 	else if(istype(C, /obj/item/airlock_painter))
 		change_paintjob(C, user)
+	else if(istype(C, /obj/item/door_seal)) //adding the seal
+		var/obj/item/door_seal/airlockseal = C
+		if(!density)
+			to_chat(user, "<span class='warning'>[src] must be closed before you can seal it!</span>")
+			return
+		if(seal)
+			to_chat(user, "<span class='warning'>[src] has already been sealed!</span>")
+			return
+		user.visible_message("<span class='notice'>[user] begins sealing [src].</span>", "<span class='notice'>You begin sealing [src].</span>")
+		playsound(src, 'sound/items/jaws_pry.ogg', 30, TRUE)
+		if(!do_after(user, airlockseal.seal_time, target = src))
+			return
+		if(!density)
+			to_chat(user, "<span class='warning'>[src] must be closed before you can seal it!</span>")
+			return
+		if(seal)
+			to_chat(user, "<span class='warning'>[src] has already been sealed!</span>")
+			return
+		if(!user.transferItemToLoc(airlockseal, src))
+			to_chat(user, "<span class='warning'>For some reason, you can't attach [airlockseal]!</span>")
+			return
+		playsound(src, 'sound/machines/airlockforced.ogg', 30, TRUE)
+		user.visible_message("<span class='notice'>[user] finishes sealing [src].</span>", "<span class='notice'>You finish sealing [src].</span>")
+		seal = airlockseal
+		modify_max_integrity(max_integrity * AIRLOCK_SEAL_MULTIPLIER)
+		update_icon()
+
 	else if(istype(C, /obj/item/paper) || istype(C, /obj/item/photo))
 		if(note)
 			to_chat(user, "<span class='warning'>There's already something pinned to this airlock! Use wirecutters to remove it.</span>")
@@ -938,6 +982,9 @@
 
 /obj/machinery/door/airlock/try_to_weld(obj/item/weldingtool/W, mob/user)
 	if(!operating && density)
+		if(seal)
+			to_chat(user, "<span class='warning'>[src] is blocked by a seal!</span>")
+			return
 		if(user.a_intent != INTENT_HELP)
 			if(!W.tool_start_check(user, amount=0))
 				return
@@ -968,6 +1015,36 @@
 /obj/machinery/door/airlock/proc/weld_checks(obj/item/weldingtool/W, mob/user)
 	return !operating && density
 
+/**
+  * Used when attempting to remove a seal from an airlock
+  *
+  * Called when attacking an airlock with an empty hand, returns TRUE (there was a seal and we removed it, or failed to remove it)
+  * or FALSE (there was no seal)
+  * Arguments:
+  * * user - Whoever is attempting to remove the seal
+  */
+/obj/machinery/door/airlock/try_remove_seal(mob/living/user)
+	if(!seal)
+		return FALSE
+	var/obj/item/door_seal/airlockseal = seal
+	if(!ishuman(user))
+		to_chat(user, text("<span class='warning'>You don't have the dexterity to remove the seal!</span>"))
+		return TRUE
+	user.visible_message("<span class='notice'>[user] begins removing the seal from [src].</span>", "<span class='notice'>You begin removing [src]'s pneumatic seal.</span>")
+	playsound(src, 'sound/machines/airlockforced.ogg', 30, TRUE)
+	if(!do_after(user, airlockseal.unseal_time, target = src))
+		return TRUE
+	if(!seal)
+		return TRUE
+	playsound(src, 'sound/items/jaws_pry.ogg', 30, TRUE)
+	airlockseal.forceMove(get_turf(user))
+	user.visible_message("<span class='notice'>[user] finishes removing the seal from [src].</span>", "<span class='notice'>You finish removing [src]'s pneumatic seal.</span>")
+	seal = null
+	modify_max_integrity(max_integrity / AIRLOCK_SEAL_MULTIPLIER)
+	update_icon()
+	return TRUE
+
+
 /obj/machinery/door/airlock/try_to_crowbar(obj/item/I, mob/living/user, forced = FALSE)
 	if(I)
 		var/beingcrowbarred = (I.tool_behaviour == TOOL_CROWBAR)
@@ -977,6 +1054,9 @@
 			if(I.use_tool(src, user, 40, volume=100))
 				deconstruct(TRUE, user)
 				return
+	if(seal)
+		to_chat(user, "<span class='warning'>Remove the seal first!</span>")
+		return
 	if(locked)
 		to_chat(user, "<span class='warning'>The airlock's bolts prevent it from being forced!</span>")
 		return
@@ -1018,7 +1098,7 @@
 
 
 /obj/machinery/door/airlock/open(forced=0)
-	if( operating || welded || locked )
+	if( operating || welded || locked || seal )
 		return FALSE
 	if(!forced)
 		if(!hasPower() || wires.is_cut(WIRE_OPEN))
@@ -1060,7 +1140,7 @@
 
 
 /obj/machinery/door/airlock/close(forced=0)
-	if(operating || welded || locked)
+	if(operating || welded || locked || seal)
 		return
 	if(density)
 		return TRUE
@@ -1175,7 +1255,7 @@
 		return
 	if(!density) //Already open
 		return ..()
-	if(locked || welded) //Extremely generic, as aliens only understand the basics of how airlocks work.
+	if(locked || welded || seal) //Extremely generic, as aliens only understand the basics of how airlocks work.
 		if(user.a_intent == INTENT_HARM)
 			return ..()
 		to_chat(user, "<span class='warning'>[src] refuses to budge!</span>")
@@ -1294,6 +1374,9 @@
 /obj/machinery/door/airlock/rcd_vals(mob/user, obj/item/construction/rcd/the_rcd)
 	switch(the_rcd.mode)
 		if(RCD_DECONSTRUCT)
+			if(seal)
+				to_chat(user, "<span class='notice'>[src]'s seal needs to be removed first.</span>")
+				return FALSE
 			if(security_level != AIRLOCK_SECURITY_NONE)
 				to_chat(user, "<span class='notice'>[src]'s reinforcement needs to be removed first.</span>")
 				return FALSE
@@ -1499,6 +1582,7 @@
 
 #undef AIRLOCK_INTEGRITY_N
 #undef AIRLOCK_INTEGRITY_MULTIPLIER
+#undef AIRLOCK_SEAL_MULTIPLIER
 #undef AIRLOCK_DAMAGE_DEFLECTION_N
 #undef AIRLOCK_DAMAGE_DEFLECTION_R
 
diff --git a/code/game/machinery/doors/door.dm b/code/game/machinery/doors/door.dm
index 0c22882d217..fe92c587e52 100644
--- a/code/game/machinery/doors/door.dm
+++ b/code/game/machinery/doors/door.dm
@@ -41,6 +41,7 @@
 	var/safety_mode = FALSE ///Whether or not the airlock can be opened with bare hands while unpowered
 	var/can_crush = TRUE /// Whether or not the door can crush mobs.
 
+
 /obj/machinery/door/examine(mob/user)
 	. = ..()
 	if(red_alert_access)
@@ -97,6 +98,17 @@
 			return TRUE
 	return FALSE
 
+/**
+  * Called when attempting to remove the seal from an airlock
+  *
+  * Here because we need to call it and return if there was a seal so we don't try to open the door
+  * or try its safety lock while it's sealed
+  * Arguments:
+  * * user - the mob attempting to remove the seal
+  */
+/obj/machinery/door/proc/try_remove_seal(mob/user)
+	return
+
 /obj/machinery/door/Bumped(atom/movable/AM)
 	. = ..()
 	if(operating || (obj_flags & EMAGGED))
@@ -159,6 +171,8 @@
 	. = ..()
 	if(.)
 		return
+	if(try_remove_seal(user))
+		return
 	if(try_safety_unlock(user))
 		return
 	return try_to_activate_door(user)
diff --git a/code/game/objects/items/door_seal.dm b/code/game/objects/items/door_seal.dm
new file mode 100644
index 00000000000..66c6c0070bc
--- /dev/null
+++ b/code/game/objects/items/door_seal.dm
@@ -0,0 +1,25 @@
+/obj/item/door_seal
+	name = "pneumatic seal"
+	desc = "A brace used to seal and reinforce an airlock. Useful for making areas inaccessible to those without opposable thumbs."
+	icon = 'icons/obj/items_and_weapons.dmi'
+	icon_state = "pneumatic_seal"
+	lefthand_file = 'icons/mob/inhands/items_lefthand.dmi'
+	righthand_file = 'icons/mob/inhands/items_righthand.dmi'
+	flags_1 = CONDUCT_1
+	resistance_flags = FIRE_PROOF | ACID_PROOF
+	force = 5
+	throwforce = 5
+	throw_speed = 2
+	throw_range = 1
+	w_class = WEIGHT_CLASS_BULKY
+	custom_materials = list(/datum/material/iron=5000,/datum/material/plasma=500)
+	/// how long the seal takes to place on the door
+	var/seal_time = 3 SECONDS
+	/// how long it takes to remove the seal from a door
+	var/unseal_time = 2 SECONDS
+
+/obj/item/door_seal/suicide_act(mob/user)
+	user.visible_message("<span class='suicide'>[user] is sealing [user.p_them()]self off from the world with [src]! It looks like [user.p_theyre()] trying to commit suicide!</span>")
+	playsound(src, 'sound/items/jaws_pry.ogg', 30, TRUE)
+	return(BRUTELOSS)
+
diff --git a/code/modules/research/designs/misc_designs.dm b/code/modules/research/designs/misc_designs.dm
index 5a39a9a9ede..ec7c217089e 100644
--- a/code/modules/research/designs/misc_designs.dm
+++ b/code/modules/research/designs/misc_designs.dm
@@ -324,6 +324,15 @@
 	build_path = /obj/item/bikehorn/rubberducky/plasticducky
 	category = list("Equipment")
 
+/datum/design/pneumatic_seal
+	name = "Pneumatic Seal"
+	desc = "A heavy brace used to seal doors. Useful for keeping out people without the dexterity to remove it."
+	id = "pneumatic_seal"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 20000, /datum/material/plasma = 10000)
+	build_path = /obj/item/door_seal
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING | DEPARTMENTAL_FLAG_SECURITY
 
 /////////////////////////////////////////
 ////////////Janitor Designs//////////////
diff --git a/code/modules/research/techweb/all_nodes.dm b/code/modules/research/techweb/all_nodes.dm
index 0e07b819bc7..dceedf4bf98 100644
--- a/code/modules/research/techweb/all_nodes.dm
+++ b/code/modules/research/techweb/all_nodes.dm
@@ -139,7 +139,7 @@
 	design_ids = list("solarcontrol", "recharger", "powermonitor", "rped", "pacman", "adv_capacitor", "adv_scanning", "w-recycler" , "emitter", "high_cell", "adv_matter_bin", "scanner_gate",
 	"atmosalerts", "atmos_control", "recycler", "autolathe", "high_micro_laser", "nano_mani", "mesons", "welding_goggles", "thermomachine", "rad_collector", "tesla_coil", "grounding_rod",
 	"apc_control", "cell_charger", "power control", "airlock_board", "firelock_board", "airalarm_electronics", "firealarm_electronics", "cell_charger", "stack_console", "stack_machine",
-	"oxygen_tank", "plasma_tank", "emergency_oxygen", "emergency_oxygen_engi", "plasmaman_tank_belt", "electrolyzer", "adv_electrolite")
+	"oxygen_tank", "plasma_tank", "emergency_oxygen", "emergency_oxygen_engi", "plasmaman_tank_belt", "electrolyzer", "adv_electrolite", "pneumatic_seal")
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 7500)
 
 /datum/techweb_node/adv_engi
diff --git a/icons/mob/inhands/items_lefthand.dmi b/icons/mob/inhands/items_lefthand.dmi
index 79819e6379a..62cde84497e 100644
Binary files a/icons/mob/inhands/items_lefthand.dmi and b/icons/mob/inhands/items_lefthand.dmi differ
diff --git a/icons/mob/inhands/items_righthand.dmi b/icons/mob/inhands/items_righthand.dmi
index 49c4b6d203f..639f12e8814 100644
Binary files a/icons/mob/inhands/items_righthand.dmi and b/icons/mob/inhands/items_righthand.dmi differ
diff --git a/icons/obj/doors/airlocks/abductor/overlays.dmi b/icons/obj/doors/airlocks/abductor/overlays.dmi
index 6bc8aae620f..855414ca1e0 100644
Binary files a/icons/obj/doors/airlocks/abductor/overlays.dmi and b/icons/obj/doors/airlocks/abductor/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/centcom/overlays.dmi b/icons/obj/doors/airlocks/centcom/overlays.dmi
index 7ec3486053f..a608a7f2110 100644
Binary files a/icons/obj/doors/airlocks/centcom/overlays.dmi and b/icons/obj/doors/airlocks/centcom/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/clockwork/overlays.dmi b/icons/obj/doors/airlocks/clockwork/overlays.dmi
index b34b73fb4e4..c8c4854a117 100644
Binary files a/icons/obj/doors/airlocks/clockwork/overlays.dmi and b/icons/obj/doors/airlocks/clockwork/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/cult/runed/overlays.dmi b/icons/obj/doors/airlocks/cult/runed/overlays.dmi
index 19920538d9d..3bfe88f2df8 100644
Binary files a/icons/obj/doors/airlocks/cult/runed/overlays.dmi and b/icons/obj/doors/airlocks/cult/runed/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/cult/unruned/overlays.dmi b/icons/obj/doors/airlocks/cult/unruned/overlays.dmi
index 5fb77f2676c..2bcbbeafbf0 100644
Binary files a/icons/obj/doors/airlocks/cult/unruned/overlays.dmi and b/icons/obj/doors/airlocks/cult/unruned/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/external/overlays.dmi b/icons/obj/doors/airlocks/external/overlays.dmi
index 1dde58ab5af..0ecffb0aec6 100644
Binary files a/icons/obj/doors/airlocks/external/overlays.dmi and b/icons/obj/doors/airlocks/external/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/glass_large/overlays.dmi b/icons/obj/doors/airlocks/glass_large/overlays.dmi
index 04e7d7093ca..bc9cc86c107 100644
Binary files a/icons/obj/doors/airlocks/glass_large/overlays.dmi and b/icons/obj/doors/airlocks/glass_large/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/hatch/overlays.dmi b/icons/obj/doors/airlocks/hatch/overlays.dmi
index affcbbf2ce4..d3f21a5056f 100644
Binary files a/icons/obj/doors/airlocks/hatch/overlays.dmi and b/icons/obj/doors/airlocks/hatch/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/highsec/overlays.dmi b/icons/obj/doors/airlocks/highsec/overlays.dmi
index 2a6868c34b9..d0499112527 100644
Binary files a/icons/obj/doors/airlocks/highsec/overlays.dmi and b/icons/obj/doors/airlocks/highsec/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/shuttle/overlays.dmi b/icons/obj/doors/airlocks/shuttle/overlays.dmi
index 70df6102127..74472a3b549 100644
Binary files a/icons/obj/doors/airlocks/shuttle/overlays.dmi and b/icons/obj/doors/airlocks/shuttle/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/station/overlays.dmi b/icons/obj/doors/airlocks/station/overlays.dmi
index b0c5780695b..861170d9456 100644
Binary files a/icons/obj/doors/airlocks/station/overlays.dmi and b/icons/obj/doors/airlocks/station/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/station2/overlays.dmi b/icons/obj/doors/airlocks/station2/overlays.dmi
index 4cb389cbf2d..7665b485578 100644
Binary files a/icons/obj/doors/airlocks/station2/overlays.dmi and b/icons/obj/doors/airlocks/station2/overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/survival/survival_overlays.dmi b/icons/obj/doors/airlocks/survival/survival_overlays.dmi
index f8e62144cd8..8f12e9592ee 100644
Binary files a/icons/obj/doors/airlocks/survival/survival_overlays.dmi and b/icons/obj/doors/airlocks/survival/survival_overlays.dmi differ
diff --git a/icons/obj/doors/airlocks/vault/overlays.dmi b/icons/obj/doors/airlocks/vault/overlays.dmi
index f18346acf68..4197ced6fcb 100644
Binary files a/icons/obj/doors/airlocks/vault/overlays.dmi and b/icons/obj/doors/airlocks/vault/overlays.dmi differ
diff --git a/icons/obj/items_and_weapons.dmi b/icons/obj/items_and_weapons.dmi
index 2dfa83f5dc2..ae3416570eb 100644
Binary files a/icons/obj/items_and_weapons.dmi and b/icons/obj/items_and_weapons.dmi differ
diff --git a/tgstation.dme b/tgstation.dme
index 2bd37083d55..12f990eac62 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -983,6 +983,7 @@
 #include "code\game\objects\items\dice.dm"
 #include "code\game\objects\items\dna_injector.dm"
 #include "code\game\objects\items\documents.dm"
+#include "code\game\objects\items\door_seal.dm"
 #include "code\game\objects\items\dualsaber.dm"
 #include "code\game\objects\items\eightball.dm"
 #include "code\game\objects\items\emags.dm"