DeltaSecretFix-EPS-FR is an Insulated Wall Panel 
System, comprising of two pre-painted, roll-formed 
steel skins, bonded to a fire retardant grade expanded 
polystyrene core.
The top and bottom skins skins are offset by 25mm, 
this allows for the placement of the Interface locking 
bracket which has the dual purpose of locking the 
top and bottom skins together while also offering a 
method of secretly fixing the panel. The result is a 
clean exterior finish with no visible fasteners.
Early Fire Hazard Properties AS 1530.3:1999
AWTA Test Report 18-006076 14-11-2018
Index
Test Range
External 
Top Skin
Ignitability
0-20
0
Spread of Flame
0-10
0
Heat Evolved
0-10
0
Smoke Developed
0-10
2
Steel Skin Details
Top Skin
0.40mm / 0.60mm / G300 Z275
Bottom Skin
0.40mm / 0.60mm / G300 Z275
Max. Skin 
Temperature
78oC Dry Heat
Core Material Details
Expanded Polystyrene - Fire Retardant Grade
Thermal Conductivity
AS 1366.2/ASTM C 518
Average 0.042 W/mK @23℃
Adhesive
Thermosetting two-part adhesive
Core Density
13.5kg/m3
Panel Weight (kgs/m2) 
based on 0.6mm steel 
skins
50mm Panel
10.58
75mm Panel
10.94
100mm Panel
11.30
125mm Panel
11.66
150mm Panel
12.02
External Wall
R Value (m2.K/W) 
AS/NZS 4859 Parts 1 
& 2:2018
Thickness
Winter (15oC)
Summer (23oC)
50mm Panel
1.39
1.32
75mm Panel
1.91
1.81
100mm Panel
2.53
2.40
125mm Panel
3.14
2.98
150mm Panel
3.70
3.52
Sheet Coverage
1200mm
Length (mm)
Cut to Length Min of 1800mm
Length Tolerance (mm)
5mm+/-
Thickness (mm)
50, 75, 100, 125, 150
Flatness
Standards
0.40mm 
0.60mm
Surface deformations can be 
apparent to the naked eye when 
observed in certain lighting 
conditions
Recommendations
•  Architectural Structures
•  Curtain Walling
•  Clean Rooms
•  Feature Walls
•  Commercial Buildings
•  Residential Buildings
Profiles Available
•	
Smooth - As the top and bottom skins are 
offset it is recommended that the steel skins 
are left as smooth. This will ensure a perfect 
alignment of all skins and joins
-EPS-FR
-EPS-FR
Detail A
Detail B
Delta Panels Pty Ltd - ABN: 11 147 861 292
E: info@deltapanels.com   
W: www.deltapanels.com    
Head Office: 731 Boundary Road, Richlands, Qld 4077    P: +61 7 3271 2170    
Sydney Depot: 11 The Old Northern Road, Narellan, NSW 2567   P: +61 2 4611 7712      
Version Date: 2024-10-23

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