diff --git a/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm b/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm
index 8da50d488f..fdc8d03374 100644
--- a/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm
+++ b/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm
@@ -98,6 +98,7 @@
 	new /obj/item/tank/internals/emergency_oxygen/engi(src)
 	new /obj/item/analyzer(src)
 	new /obj/item/holosign_creator/atmos(src)
+	new /obj/item/holosign_creator/firelock(src)
 	new /obj/item/watertank/atmos(src)
 	new /obj/item/clothing/suit/fire/atmos(src)
 	new /obj/item/clothing/head/hardhat/atmos(src)
diff --git a/code/game/objects/structures/holosign.dm b/code/game/objects/structures/holosign.dm
index 383ddd929f..69ad9f1567 100644
--- a/code/game/objects/structures/holosign.dm
+++ b/code/game/objects/structures/holosign.dm
@@ -85,24 +85,14 @@
 	name = "holo firelock"
 	desc = "A holographic barrier resembling a firelock. Though it does not prevent solid objects or gas from passing through, temperature changes are kept out."
 	icon_state = "holo_firelock"
-	density = TRUE
+	density = FALSE
 	anchored = TRUE
 	alpha = 150
+	resistance_flags = FIRE_PROOF
 
-/obj/structure/holosign/barrier/firelock/BlockSuperconductivity()
+/obj/structure/holosign/barrier/firelock/blocksTemperature()
 	return TRUE
 
-/obj/structure/holosign/barrier/firelock/fire_act(exposed_temperature,exposed_volume)
-	return
-
-/obj/structure/holosign/barrier/firelock/CanPass(atom/movable/mover, turf/target)
-	if(mover.pass_flags & (PASSGLASS|PASSTABLE|PASSGRILLE))
-		return 1
-	if(iscarbon(mover))
-		var/mob/living/carbon/C = mover
-		if(allow_walk && C.m_intent == MOVE_INTENT_WALK)
-			return 1
-
 /obj/structure/holosign/barrier/cyborg
 	name = "Energy Field"
 	desc = "A fragile energy field that blocks movement. Excels at blocking lethal projectiles."
diff --git a/code/modules/atmospherics/environmental/LINDA_turf_tile.dm b/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
index 196bf70fdc..389f1a69f3 100644
--- a/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
+++ b/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
@@ -358,6 +358,9 @@
 	SSair.excited_groups -= src
 
 ////////////////////////SUPERCONDUCTIVITY/////////////////////////////
+/atom/movable/proc/blocksTemperature()
+	return FALSE
+
 /turf/proc/conductivity_directions()
 	if(archived_cycle < SSair.times_fired)
 		archive()
@@ -372,6 +375,9 @@
 			. |= direction
 
 /turf/proc/neighbor_conduct_with_src(turf/open/other)
+	for (var/atom/movable/G in src)
+		if (G.blocksTemperature())
+			return
 	if(!other.blocks_air) //Open but neighbor is solid
 		other.temperature_share_open_to_solid(src)
 	else //Both tiles are solid
@@ -382,7 +388,9 @@
 	if(blocks_air)
 		..()
 		return
-
+	for (var/atom/movable/G in src)
+		if (G.blocksTemperature())
+			return
 	if(!other.blocks_air) //Both tiles are open
 		var/turf/open/T = other
 		T.air.temperature_share(air, WINDOW_HEAT_TRANSFER_COEFFICIENT)
@@ -401,10 +409,8 @@
 
 				if(!neighbor.thermal_conductivity)
 					continue
-
 				if(neighbor.archived_cycle < SSair.times_fired)
 					neighbor.archive()
-
 				neighbor.neighbor_conduct_with_src(src)
 
 				neighbor.consider_superconductivity()
diff --git a/code/modules/research/designs/misc_designs.dm b/code/modules/research/designs/misc_designs.dm
index 5f7648b245..302ac345b7 100644
--- a/code/modules/research/designs/misc_designs.dm
+++ b/code/modules/research/designs/misc_designs.dm
@@ -364,6 +364,16 @@
 	category = list("Equipment")
 	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
 
+/datum/design/holosignfirelock
+	name = "ATMOS Holofirelock Projector"
+	desc = "A holographic projector that creates holographic barriers that prevent changes in temperature conditions."
+	id = "holosignfirelock"
+	build_type = PROTOLATHE
+	materials = list(MAT_METAL = 5000, MAT_GLASS = 1000, MAT_GOLD = 1000, MAT_SILVER = 1000)
+	build_path = /obj/item/holosign_creator/firelock
+	category = list("Equipment")
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
 /datum/design/forcefield_projector
 	name = "Forcefield Projector"
 	desc = "A device which can project temporary forcefields to seal off an area."
diff --git a/code/modules/research/techweb/all_nodes.dm b/code/modules/research/techweb/all_nodes.dm
index eed1e4aefd..2df93ca0e8 100644
--- a/code/modules/research/techweb/all_nodes.dm
+++ b/code/modules/research/techweb/all_nodes.dm
@@ -430,7 +430,7 @@
 	display_name = "Electromagnetic Theory"
 	description = "Study into usage of frequencies in the electromagnetic spectrum."
 	prereq_ids = list("base")
-	design_ids = list("holosign", "holosignsec", "holosignengi", "holosignatmos", "inducer", "tray_goggles", "holopad")
+	design_ids = list("holosign", "holosignsec", "holosignengi", "holosignatmos", "holosignfirelock", "inducer", "tray_goggles", "holopad")
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
 	export_price = 5000