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Diamond grille security screens

Diamond grille

Diamond design is the classic security screen, and still the cheapest option on the market. The fly screen mesh keeps out the insects. 


Prowler Proof Diamond design is both secure and economical. It is available as SnapLock – a unique production process that makes it possible to choose any colour frame to match a black mesh; or welded, where the frame and grille are the same colour. There are no visible joints – it looks and feels like the security screen is made in one piece.

It comes with insect gauze as standard; micromesh can be fitted to keep out even the smallest insects; and the stronger pet proof mesh will provide some protection against wear and tear from pets. Full range of colours available. 


Exceeds all Australian Standards for security


Reduces entry of heat and UV inside

10 year warranty

10 year full replacement warranty


Tested and meets requirements for bushfire flame zone (BAL-FZ)


Exceeds requirements for fall prevention


Passed corrosion tests


Keeps out flies, mosquitos and other insects


Passed cyclone debris testing

Enjoy your outdoor areas with security


ForceField more than passes all the Australian Standards for security screens, and has proven high resistance to corrosion. It is also the only security screen to be tested and proven to withstand the flame zone, meeting the requirements for BAL-FZ. And they come with an 10 year full replacement warranty to give you complete peace of mind. 



ForceField screens are available in fixed windows, hinged doors, sliding doors, stacking doors and fixed screens.

If you need to open your security screens, ForceField is available in side opening hinged escape windows, opening either in or out. And they are the only security screen windows you can completely remove!



ForceField screens are the only security screens with seamfree welded corners, joined by state of the art welding robots. There are no screws and rivets, so no chance for corrosion that can occur when two different metals interact. And most importantly, ForceField screens feel like they're made in one piece - they feel stronger because they are stronger. 

All security doors come standard with Lockwood triple locks. All doors come standard with bug strips; and hinged doors with door closers. 

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Industrial strength adhesive bonds the stainless steel mesh to the frame. The adhesive is applied to a dove tail groove in the frame, and penetrates through the mesh, filling all the gaps and creating a complete mechanical bond between the mesh and the frame. The adhesive is so strong it's used in aerospace and motor sports applications. 

A sleek retaining strip hides the join and finishes the frame, leaving you with the best looking screen on the market. 

102 standard colours

ForceField is available in 102 standard colours, and an additional 200 colours at extra cost. All screens are powder coated at the Prowler Proof Brisbane factory to the highest standards. 

View the Prowler Proof standard colour range

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10 year warranty

Prowler Proof offer a full replacement, 10 year warranty on ForceField screens. We simply supply a new product if a Prowler Proof product shows defects in workmanship or materials within 10 years from manufacture. We don't try and repair your screen or replace parts - you get a full, brand new product. All products are automatically covered as soon as they leave the factory; there is no need to keep your receipt or register your warranty. We recommend you follow the care and maintenance guide to look after your screens, but there is no required cleaning schedule.  

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Locally made

ForceField screens are made right here in South East Queensland, at the state of the art Banyo factory. Prowler Proof has achieved a 'World Class' rating on the PROBE Manufacturing global benchmark. PROBE is an international diagnostic assessment that benchmarks an organisation across a selection of international companies. Prowler Proof achieved ratings 20 and 19 points above the industry average, and well above the requirement of a World Class rating. 

Find out more at the Prowler Proof website.

Product information

Security screens must meet standards for both construction and installation in order to qualify as security screens, as well as passing stringent tests. Australian Standard  AS5041 sets out the required tests for security screen doors and windows. Key tests include the dynamic impact, jemmy  and knife shear tests. In addition, there are safety standards for fire, cyclones and corrosion. 

Security test results

Dynamic impact test

The dynamic impact test simulates an intruder trying to kick through a security door or window. A bag full of lead shot and sand weighing more than 40 kg is smashed into the security screen with a force of 100 joules, repeated 5 times. ForceField screens pass the test with ease, withstanding forces that no human could apply.

Jemmy test

The jemmy test is designed to simulate an intruder using a lever to get past the security door or window. The test is performed with a large screwdriver at all locking, hinging and fastening points. The force applied is up to 450 N (45 kg) for 20 seconds – way beyond the capability of most potential intruders.​ Even with substantial force applied, ForceField locking and fixing points just won't give way.

Pull test

Imagine an intruder trying to pull out your security screen…that’s what the pull test is all about. The security door or window must be able to withstand pulling forces of up to 2 kN (200 kg) for 20 seconds at various positions from various angles. Nothing could pull out the ForceField screen!

Probe test

The probe test simulates an intruder having created a gap and trying to get a hand inside to unlock a door or a window. A deflecting force of 1.5 kN (150 kg) is applied to each opposite side of the opening to increase the space enough to get a hand through. ForceField passed, of course - it is not possible to get a hand inside the mesh. 

Shear test

The shear test simulates a cutting plier attack on a security screen. The shearing tool applies increasing pressure until the sample chord breaks. The force required to break one chord must be at least 3 kN (300 kg). It is not even possible for the pliers to get a hold on ForceField screens. 

Knife shear test

The knife shear test simulates a knife attack on your security screen. A heavy duty trimming knife is dragged along a 250 mm line with a force of 150 N (15 kg) vertically and up to 350 N (35 kg) horizontally. The test is repeated 3 times, each time with a new blade, along the same line. The test leaves hardly a scratch on ForceField screens. 

Endurance test results

Bushfire test

For resistance to bushfire, look no further than ForceField screens. ForceField are the only screens tested and approved up to extreme level BAL-FZ (fire zone). 

The Fire attentuation test (FS 4302/3572) subjects screens to a radiant heat flux level of 60 kw/m2 for at least 60 minutes. Most bushfires will create heat levels of around 40 kw/m2. ForceField screens were still in position after 91 minutes. The heat level measured one metre behind the window screen was around 10% of the heat level at the front of the screen. ​

Cyclone test

Cyclone testing can tell you a lot about the strength of a screen. Prowler Proof ForceField has been extensively tested and exceeds the requirements for both the ballistics and missile tests. In the missile test, a 4kg timber block is smashed at the security screen. In the ballistics test, 5 steel balls of 8mm diameter weighing 2g each are fired at the security screen. 


During the missile test, ForceField withstood a 65 km/h corner impact and centre impacts at speeds of up to 104 km/h. The force of the centre impacts reached 1,659 joules – 16 times more than what is required to pass the Australian Standards dynamic impact test! The steel balls in the ballistics test reached speeds of up to 178 km/h without penetrating the mesh.​

US hurricane and pressure cycle test

ForceField also easily passed the US Hurricane & pressure cycle test, which consists of a missile test and a pressure cycle test. The missile test smashes a 4.1 kg piece of timber at the security screen at an impact speed of 54 km/h. The same security screen is then air pressure cycled, simulating various wind directions and wind speeds, 9,000 times.

Salt spray test
AS 2331.3.1

Two factors make Prowler Proof resistance to corrosion - it is fully welded with no untreated or raw edges and it is powder coated after assembly, eliminating the risk of damage to the paint during assembly.


​The salt spray test tests the integrity of the screen in response to a spray that is saltier than sea water, in a closed chamber, at almost 100% humidity and 35 degrees. All Prowler Proof screens passed more than 1000 hours with no corrosion. 

Acetic acid salt spray test (AS 2331.3.2)

The 1,000 hour acetic acid salt spray test is pure torture. Acetic acid salt spray is saltier than sea water and 10,000 times more acidic. The test takes place in an enclosed chamber at a temperature of +35ºC with almost 100% humidity.

​Prowler Proof Force Field passes the acetic acid salt spray test - the only brand to do so. If you live in a coastal area and are worried about corrosion, Prowler Proof is your safe choice. 

Energy and UV light

ForceField mesh helps keep you warm in winter and cool in summer, by keeping out solar heat and UV light and reducing heat loss. In the Window Energy Rating Scheme (WERS) test, ForceField reduced solar heat gain and UV light by up to 67% (WERS rating 5 stars). Reduced heat loss was up to 28%, resulting in a 3 star WERS rating.


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