KNA Security Perth - Authorised Invisi Gard Dealer

Invisi-Gard – The best in Stainless Steel Security Doors & Screens!

Invisi-Gard is the absolute best in security doors and screens today, with a 15 year warranty you know you are getting Quality & Peace of mind. Utilising the superior 316 Marine Grade Stainless Steel high tensile (900MPa) mesh, we produce the most secure aesthetically pleasing and corrosion resistant systems on the market. (explanation on corrosion between dissimilar metals).
Do you want maximum security, maximum visibility and product that will last? Then this is it!
Available as hinged security doors, sliding security doors, double security doors, security screens and escape screens. Pet doors available.
How much do security doors in Perth cost?

How strong???

See our demonstration here…


How strong is our system?
INVISI GARD has been tested and shown to resist more than 50 consecutive impacts, each of 100 Joules of force without failure!
(We have done our own demonstration that shows a screen absorbing a MASSIVE 5 consecutive impacts at 588 JOULES of force EACH!!!).

Our Stainless system not only passes the Australian Standards for the Dynamic Impact test that simulates a forced entry, it absorbed 10 times  the energy required!. It has also passed the Jemmy Test and Knife Test, keep your family, home and valuables safe from crime.

Here a 4kg block of hardwood is fired at 20 meters per second simulating debris in cyclonic storm conditions.



Only quality mesh?
With so many mesh systems on the market all claiming to be the best it can be hard to know what’s best. Many stainless systems in Australia DO NOT meet the requirements set out in the Australian Standards. Generally these products are not using High Tensile (900MPa) wire, do not continually check the composition via chemical certification, have inferior and cheap pre-treatments against corrosion before powder-coating, and use lower grade powder-coats that do not come close the UV resistance of the powder-coat used in Invisi-Gard systems.
Corrosion resistance.
Take care when choosing a stainless system, the Invisi-Gard system is fully insulated meaning the aluminium frame doesnt come into contact with the Stainless Steel mesh. Why is being insulated so important? see this article.
The Salt Spray Test is required by AS5039, security doors and screens have to pass 240 hours in this accelerated weather test with no sign of corrosion.
While some systems start to fail after just 500-750 hours, Invisi-Gard has resisted rigorous testing to 2,000 hours. The 316 Marine Grade Stainless used in our system resists 10,000 hours with no sign of corrosion!

INVISI-GARD Product Testing.

  • Stainless Steel Mesh Knife Shear Test – AS5041 PASS
  • Dynamic Impact Test – AS5041 PASS
  • Lock and Hinge Lever Test – AS5041 PASS
  • Fire Attenuation – AS1530.4 43% Attenuation
  • Swimming Pool Safety – AS1926 PASS
  • Neutral Salt Spray PASS 1000 Hours
  • AS1170.2 Windborne Debris – 20m/s PASS

More information on our locks

INVISI-GARD standard colour range (special colours available)
On-line colour swatches are a guide only as individual monitors show colour differently.
Grp 1 colours do incur a small powder-coating fee

Magnolia Doeskin Pearl White Black Anotec Dark Grey
Anodic Natural/Silver Lustre Brown Clear Anodised (Grp1) Bronze Anodised (Grp1)  Anodic Silver Grey (Grp1)
Charcoal Gloss (Grp1) Charcoal Lustre White Lustre Surf Mist Matt (Grp1) White Birch

Ask us about our timber look frames.


We supply and fit Security doors and screens Perth to Two Rocks, including Yanchep, Alkimos, Jindalee, Butler, Wanneroo, Banksia Grove, Brabham, Ellenbrook etc