We sell a Stainless Steel security system called Invisi-Gard which meets all Australian Standards, is fit for purpose and is priced competitively. Crimsafe is another brand of stainless steel security in the market.

Invisi-Gard is strong enough to exceed the impact requirements of the current Australian Standard. The standard also requires security systems to pass lock and lever jimmy tests, pull tests, and knife shear tests…… so impact strength is only part of the picture.

Invisi-Gard uses a patented retention system comprised of PVC pressure wedges. These wedges hold the mesh under pressure along the entire perimeter of the window or door frame.

Invisi-Gard uses Marine Grade 316 Stainless Steel mesh giving increased protection from corrosion over Crimsafe’s Grade 304 Stainless Steel mesh. 

Invisi-Gard’s pressure retention system completely isolates the Stainless Steel from the Aluminium ensuring there is no possibility of galvanic corrosion taking place. The Crimsafe system uses stainless steel screw fastenings which bite through the mesh and into the Aluminium frame leading to galvanic corrosion becoming a potential issue during the life of the product.

Invisi-Gard uses a finer wire in the mesh weave allowing greater visibility and air flow through the product. The wire is finer yet it has a higher strength, so there is no compromise to the strength of the system. 

Invisi-Gard can be dismantled if there is a need to service the window or door during
its life. Other systems require the entire window or door to be replaced. 

Invisi-Gard has the advantage of being able to tension the mesh during fabrication which means the mesh is taught in the frame. This is particularly important in sliding and stacker doors to avoid the panels scuffing against each other during use. The Crimsafe system does not tension the mesh.

There are many instances in suburbs and properties well away from the coast where corrosion can still be a problem due to airborne contaminants. Anywhere there is water vapour, ammonia fumes, pollution, acidic deposits, and strong alkaline exposure to name a few can become corrosion issues.

 Only Grade 316 can offer the maximum protection at a reasonable price.

The knife shear test measures the resistance of the wire in the mesh to attack by the use of a sharp blade. Essentially a panel of mesh is subjected to three attempts to cut through it with the use of a Stanley knife. In order to pass this test, any cut made by the blade after the third attempt is completed must be less than 150mm long. This is to simulate an intruder trying to force their hand through the open cut.

Knife shear tests should be done in two directions at ninety degrees to each other as
some lower quality suppliers use weaker wire in one of the weaving directions.

Invisi-Gard meets the mesh screening requirements of AS3959 Construction of buildings in bushfire prone areas up to Bushfire Attack Level 40 (BAL 40) in that it is made from a non corrosive steel and the mesh apertures are less than 2mm. In fact the material is Grade 316 Stainless Steel and the apertures in the mesh are 1.6mm. 

Invisi-Gard also achieves fire attenuation ratings of 43% based on an incident heat flux of 40KW/m^2 and 27% based on an incident heat flux of 80KW/m^2.

Invisi-Gard has an open area of 44% and as such demonstrates excellent airflow and visibility.