DeltaSecretFix-TPC is an Insulated Wall Panel System, 
comprising of two pre-painted, roll-formed steel skins, 
bonded to a Thermosetting Phenolic Composite 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 23-000591 20-02-2023
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
1
Steel Skin Details
ColorBond®
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
Thermosetting Phenolic Composite 
Thermal Conductivity
AS 1366.2/ASTM C 518
Average 0.039 W/mK @23℃
Adhesive
Thermosetting two-part adhesive
Core Density
36kgs/m3 +/- 4 kgs
Panel Weight (kgs/m2) 
based on 0.6mm steel 
skins
50mm Panel
11.70
75mm Panel
12.06
100mm Panel
12.43
125mm Panel
12.08
150mm Panel
13.15
External Wall
R Value (m2.K/W) 
AS/NZS 4859 Parts 1 
& 2:2018
Thickness
Winter (15oC)
Summer (23
oC)
50mm Panel
1.46
1.41
75mm Panel
2.11
2.01
100mm Panel
2.76
2.61
125mm Panel
3.41
3.26
150mm Panel
4.06
3.86
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
Patent Application No.
AU2023266264
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.
SPECIFICATIONS
-TPC
-TPC
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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