Thermal Window Film

The new technology low emissivity (low e) characteristics of Penjerex reduces internal heat loss by reflecting internal infra-red energy (heat energy) back into the room reducing internal heat loss by 44% when compared to standard 4mm clear glass panes. 

In hot weather, it reflects heat energy from the sun by approximately 25% while also blocking the UV radiation by 99%.

The laminate construction incorporates an invisible metal foil to reflect the interior room heat back into the room where it is needed. This improves comfort by reducing potential draft feelings near the window and saves on energy costs, especially in commercial buildings. Penjerex is also protected with a tough abrasion resistant coating for long term durability and maintained appearance.

Penjerex has been tested to ISO standards under the guidance of the International Glazing Database which is overseen by the US Government Department of Energy. The database contains over 4500 glazing and film products.

Penjerex is tested to the same standards as double glaze units so the Penjerex test results are compared ‘apples to apples’ with double glazing performance specification.

The test equipment doesn’t use infra-red lamps, only heating coils and convective fans to simulate normal living and work conditions. Even though Penjerex works primarily by reflecting infrared heat, the test results and customer testimonials show that it has almost the same overall performance as double glaze panes.

We don’t have any expectation that you would ever want to remove Window Film from your windows but if the case arises then yes, it can be removed.  

It is applied to a glass surface with a pressure sensitive adhesive that cures over the course of about a month. Even when the adhesive is cured the laminate can be removed with a razor fine scraper causing no damage to window surfaces.

Yes.  Penjerex can be safely installed on double pane (thermal insulated) windows further improving their insulating and adding UV and solar heat reduction properties that double glazed don’t necessarily have. 

We can offer guidance as to if Penjerex is appropriate in certain circumstances and if any particular risks may be relevant. The manufacturer warranty of some double glazing units may be void when Penjerex is applied.  

Window Film isn't designed to reduce condensation on window surfaces. If you do have a condensation problem in your home then there are other products and solutions available that can assist to lower the impact of this.

When Penjerex is applied to a window surface it does reduce the size of condensation droplets creating the appearance of a fine mist instead of the normal large droplets running down the window.   

Tests have resulted in 5 times less condensation volume forming on Penjerex windows when compared with standard single pane glass. Reducing the volume of condensation reduces mould and damage to wooden window frames.

Penjerex doesn’t reduce external sounds by any noticeable amount.  If reducing outside noise is a concern for you we recommend looking for other products that address this problem.

Penjerex is manufactured with a superior hard coat surface which is scratch resistant to normal wear and tear.  Our product care information gives you all the advice to keep your insulating film in great condition.  It also informs you of what not to do with your Penjerex windows.

Common neutral detergent solutions (that do not contain chlorine or ammonia) may be used to clean Penjerex, along with a soft cotton rag or microfibre cloth. Avoid any abrasive cleansers or towels. 

We suggest using water & baby shampoo (one teaspoon of shampoo to a litre of water).  

Penjerex PX-8080S has the highest visual light transmission rating of any low emissivity or most solar control window films and is virtually indistinguishable from a clear window pane.

It is ideal for character homes as it does not impact on the aesthetic of windows and frames and has minimal visual change when viewed from the outside of your home or a commercial building. This allows Penjerex to be applied to specific ‘problem’ window areas or individual building floors without impacting the exterior look.

At night, you may notice a purple-ish tinge to white coloured objects reflected in the windows. This is due to the way light and infra-red heat is reflected by the insulating film. The appearance is minor. You’ll also notice that there is less interior reflection allowing you to view your night time view with less reflection than standard glass.

No, Penjerex is designed to hold broken pieces of glass together in the window opening after a break. 

This reduces the chance of injury from flying shards of glass, makes it more difficult to break in through a window, as well as increases safety and security in the event of a windstorm.