You are here

Opalux Window Film Blog

We are leading providers of externally applied heat reflective material for windows

Where there is a building within which you need to figure out a way of reducing heat gain that would stand to make users of the site uncomfortable and push up air conditioning bills, you may be tempted to investigate the many heat-reducing window films on the market. It’s therefore no surprise that you would consider such a highly rated and trusted name as Opalux – but what if you only have the option of applying such film externally, rather than internally?

You may presume in such a circumstance that there is no window film available that could provide the necessary level of resistance to the elements while also being genuinely effective at reducing heat – but you would be mistaken.

We are, in fact, highly acclaimed specialists in external heat reflective material for windows, with various well-regarded and proven options able to be purchased right now.

Several great solar reflective options are on sale

Many specifiers and end-users who wish to achieve a uniform appearance with the heat reduction films that they install ultimately choose one of our two External Reflective films – Silver 20 (SO-20RS-eSR) or Silver 35 (SO-35RS-eSR).

The Silver 20 film is especially formidable at lowering the amount of heat that reaches the occupants of a building, transmitting just 13% of solar energy through the glass, with 52% being reflected and 35% absorbed. However, the Silver 35 film may be the better choice for premises where a medium level of solar control is desired, and can be instrumental in slashing a firm’s cooling costs and, in the process, Climate Change Levy liability.

But we also give you many other fine options

We are proud to have in our stock a broad variety of high-performing and long-lasting heat reflective material for windows, so that whatever circumstances and requirements might apply at a particular site, we can help you to specify the ideal solution.

You may not be aware of our low-mirror films, for instance, that are available in exterior weatherable versions resulting in a neutral, grey or bronze appearance instead of the highly mirrored look typical of other solar reflective films.

If, meanwhile, you don’t want to noticeably change the appearance of the given building’s glazing at all but still wish to achieve a good level of solar heat rejection, it’s well worth taking a look at our SO-70IR-eSR Specialist Heat Control Clear External film. True to its name, this product is exterior grade – with a scratch-resistant coating – but also achieves as much as 99% UV rejection and absorbs 52% of solar energy, reflecting an additional 9%.

Even a polycarbonate window – such as a conservatory roof or rooflight – can benefit from Opalux’s considerable know-how in exterior-fitted heat reflective material for windows. Ask us today about our External Reflective Silver 20 for Polycarbonate (SO-20RS-eBFSR) film, which is a metallised polyester-based solar control film that has been designed specifically for polycarbonate substrates.

Allow us to allay your concerns about finding suitable heat-rejecting window film for whatever application or project you have in mind. Get in touch with Opalux at the specification stage to discuss your requirements in more detail, before requesting a free survey and quote.    


Your options for low mirror glass film to reduce heat

No one ever wishes to be stuck in a building that is made almost inhospitable by excessive heat from the sun, yet this occurs all too often, despite the ease with which it can be resolved. However, you may also have certain other requirements for any window film that you purchase to lessen the amount of heat that passes through your glazing.

It may be that you are seeking the ideal glass film to reduce heat on your premises, but aren’t satisfied with the various solar reflective films available that provide an overly mirrored look from the outside.

You may, instead, desire a more neutral appearance from any such film, which is precisely what our acclaimed low mirror solar control films here at Opalux can give you.

Both internal and external films can be purchased from us

When you are on the lookout for the perfect low mirror glass film to reduce heat in your own building, one of the first decisions that you will need to make is whether the film will be fitted from the inside or outside. This is important because we offer both internal and external versions of these in-demand window films.

Then, there is the matter of whether you prefer a bronze or grey low mirror film for your premises, and you will naturally need to consider which of these options will best suit the building’s aesthetics.

If, for example, it is a grey low mirror film for internal application that you decide represents the best match for your requirements, you will be able to choose between our SO-20NG-iSR, SO-35NG-iSR and SO-50NG-iSR films. These films all lend themselves brilliantly to quick, retro-fit installation, while also being scratch-resistant and rejecting heat gain so that the users of your buildings feel more comfortable and you don’t have to spend as much money on cooling.

At the other end of the scale, we also stock externally applied low mirror films with a bronze appearance, namely External Sputtered Bronze 20 (SO-20SB-eSR) and External Sputtered Bronze 35 (SO-35SB-eSR). Again, the performance of these films is impressive, with both of them filtering as much as 99% of the UV rays that come into contact with them, while also providing a high level of glare reduction – 76% in the case of the Bronze 20 film.

The formidable solar protection films that will give you peace of mind

When you want to be sure of selecting the window film that meets the full range of requirements you have for your given application, there’s no better option than getting in touch directly with the technical team here at Opalux.

Send an email now to or call +44 (0)845 026 1125 to receive the benefit of our tailored advice, as well as to arrange a free survey and quotation. You will soon realise that we are the only company to which you should turn for industry-leading glass film to reduce heat.

Clear heat reduction films can be invaluable if glare control is not a priority

The Opalux name has come to be associated with a broad range of highly rated solutions for the rejection of solar glare and heat gain, with just one category of such products being our clear heat control films. 

However, our clear heat control films are not ‘just any’ heat reduction films; they are highly sophisticated and spectrally selective, filtering out infrared (IR) radiation at the same time as transmitting high levels of visible light. This means that they are, first and foremost, heat reduction films, albeit also delivering a very limited amount of glare control.

Nonetheless, these are not films that you would select if glare reduction is a great priority, or if the space in question already benefits from adequate measures to minimise glare, such as the use of curtains, blinds or awnings. You are therefore especially likely to choose these films if the space in question is one where the preservation of a natural appearance is important, but you also wish to reject solar heat gain.

Several acclaimed options are available for such film

There are two solutions in our current range of internally applied clear heat reduction films, as well as a film that is to be installed externally.

The former two are the SO-70IR-iSR and SO-70XLIR-iSR films that both provide 99% UV rejection. They are also known as Opalux Specialist Heat Control Clear Film and Opalux Supreme XL IR Heat Control Film respectively, and are invaluable for such settings as retail shop windows and motor showrooms. Both of these films are also quick to apply, scratch-resistant and allow very high light transmissions.

These same advantages are also present in our External Specialist Heat Control Clear Film, which is also known as SO-70IR-eSR. It is another state-of-the-art heat reduction film that rejects a high level of solar heat, while not noticeably reducing daylight levels or changing the appearance of windows. This makes it the perfect clear solar control film in the event of internal application being deemed unfeasible or undesirable.

Allow us to assist you in your search for heat reduction films

Heat control is one of the most important functions that you may wish your window films to perform. This helps to explain why it is such a priority of ours here at Opalux to ensure only the highest-quality, up-to-the-minute heat reduction films are represented in our range.

Whatever your own requirements may be for such films as a specifier or end-user, we are likely to be able to bring you a highly suitable solution. So why not contact us today to ask a question or arrange a free survey, by calling the Opalux team today on +44 (0)845 026 1125?   


When you require window film to reduce glare, turn to Opalux

Opalux is no less than the UK’s premier window film brand, with our installing dealers catering to homes, businesses and organisations in every region of the UK. It should therefore be of no great surprise that so many of our products focus to such a great degree on the reduction of glare, often by as much as 80% or more.

Glare is, after all, one of the biggest problems plaguing many premises today, not least offices in tall buildings that see daily use. The issue may be even greater in the winter, in fact, than in the summer, due to the sun being lower in the sky during the colder and darker times of year.

The users of your buildings may find it difficult to see their computer screens and focus on their work due to excessive glare through the windows, which – when exposed to high levels of direct sunlight – can also overheat quickly. This is why so much window film to reduce glare is also very effective at minimising heat gain.

Which glare reduction films can we offer you?

By browsing the section of the Opalux website that is dedicated to heat and glare control, you can discover our vast range of suitable window film options for reducing glare.

Of our internally and externally applied solar reflective films, for instance, it is our Reflective – Silver 20 solar control film that delivers especially impressive glare reduction of 82%, alongside 99% UV rejection. However, the Reflective – Silver 35 and Reflective – Silver 50 options are also effective at minimising glare to some degree, by 66% and 47% respectively.

The mirrored look of traditional solar control films is not to everyone’s taste, however, and nor might they be the right fit for certain architecturally sensitive settings. This is why you might take an interest in our low mirror films that, in the case of such a product as the Lower Mirror – Neutral Grey 20 film, provide glare reduction of as much as 80%.

Finally, if it is a very different kind of window to the typical office glazing for which you need glare reduction film, we can offer you External Reflective Silver 20 for Polycarbonate film, which gives 81% glare reduction for polycarbonate substrates such as conservatory roofs.

We can help you to specify the perfectly-suited window film

You have a lot of options when you are seeking out window film to reduce glare on your premises. That’s why it’s so important to get in touch with us at the earliest specification stage, so that we can assist you in selecting the window film that best matches your most specialised requirements.


To do that, simply call the Opalux team now on +44 (0)845 026 1125, or send us an email

Vital safety window film for your school, hospital or other public building

When you have responsibility for managing a public building, one of the biggest factors likely to keep you awake at night is doubtless the matter of ensuring that everyone using the building is kept safe at all times. Broken glass can be a particular hazard, which is precisely why you may take an interest in our highly rated safety window film here at Opalux.

Why does our safety window film play such an important role?

It isn’t merely a moral responsibility that you have to ensure your buildings do not pose any unnecessary risks to their users or the wider public. That’s because there is also a very significant legal one, with schools, hospitals, workplaces and public buildings alike required to comply with Regulation 14 of the Workplace (Health, Safety and Welfare) Regulations 1992.

This level of legal compliance can be attained by upgrading your buildings’ glazing to ensure that in the event of it breaking, it does so safely. Any failure to comply could leave the responsible organisation liable to prosecution in the event of an accident.

In any case, such an accident can also cause great emotional trauma to everyone involved or affected, which is why you may even opt to treat all of your glazing to guard against the dangers that broken glass can cause. Thankfully, our safety window films in this category at Opalux are very much up to the task of complying with the necessary safety standards and in the process, giving you the utmost peace of mind.

Contact our technical department to ensure you choose the right window film

Whether you select our 100-micron clear SA-100CL-iSR film or instead the 175-micron clear SA-175CL-iSR option, both work according to the same principle of not only strengthening the glass against breakage, but also helping to hold dangerous shards of shattered glass in place if breakage does occur.

Such window films can be used in both commercial and domestic settings, and also offer various other advantages such as quick retro-fit installation, high optical clarity, scratch resistance and even the screening of harmful UV rays.

In this sense, these films are far from merely safety films, as they can also help to slow down the fading process of interior furnishings, serve as an effective deterrent to ‘smash-and-grab’ crime, and even protect against the glass being etched or scratched by vandals.

Remember that you don’t need to make the decision on your own as to which of these window film options may best suit your desired application. Instead, consult the Opalux technical department today, so that you can be sure of making the most informed choice as an end user or specifier.

Patterned window film is one of our most underrated specialities

We’ve all noticed patterned window films in various settings from time to time, ranging from reception areas and lobbies to internal office partitions and corridors. However, many of us may not have consciously noted just how effective they are at providing a certain amount of privacy in the spaces in which they are installed, while still permitting a high level of natural light through the glass.

This makes such window film the ideal choice when you have an internal space that you would like to give a ‘designer’ look as part of a generally light and open atmosphere. But why might you opt to purchase such film through Opalux?

There are so many types of patterned film to choose from

One of the most obvious reasons to turn to Opalux for patterned window film is the broad choice of patterns that we make available to you, depending on the overall aesthetic to which you aspire for the given space.

We can typically bring you such generic patterns as Squares, Vertical Stripes, Horizontal Stripes, Rice Paper, Parchment, Frost, Opaque Colour, Dots, Circles, Stippolite and Graduated Stripes.

To find out which patterns we can provide you with right now, simply contact us at the specification stage by calling +44 (0)845 026 1125 or emailing

Window film that plays a vital role in many different contexts

Whether you are a specifier sourcing window film for the decoration of glazing within a residential, commercial, office or retail building, our patterned window films work on the basis of certain consistent principles.

Choosing Opalux decorative window film means not only a quick installation process, but also the ability to remove, replace or update designs in the future, which can be especially handy when the film is being fitted in spaces that may see multiple changes of use over time.

It’s also worth bearing in mind the health and safety dimension of window film. The visibility of patterned film helps to ensure the users of the building do not accidentally collide with large areas of uninterrupted glazing that may not otherwise be easily discernible.

All in all, our patterned window films here at Opalux don’t just look sophisticated – they are sophisticated, providing just the decorative solution that an otherwise unadorned space might require. You can find out more about the latest products that we have to offer in this category of window film by getting in touch with the Opalux technical team now.

An introduction to our window graphics

Creative surface graphics have long played an instrumental role in commercial premises for such purposes as promoting a business’s corporate identity or meeting health and safety requirements. Sure enough, we offer a wealth of these films to our customers here at Opalux.

What kinds of graphics may you request from us?

As one of the UK’s leading names in architectural and automotive window film, we are pleased to say that we can give you the benefit of any popular type of creative surface graphics.

That may mean turning to us for plotter-cut opal frost graphics that can be applied to glass partitions, retail display windows, glass screens and plate glass windows, to name just some of the surfaces for which they are often specified. Such films can be useful for projecting creative images while fulfilling more practical needs, such as for manifestation and partial privacy screening.

However, an especially high level of creative freedom can be enjoyed when our vinyl and digital print graphics are ordered. These films serve all manner of bespoke applications, materials and processes, taking the form of window graphics and signage, multi-surface digital graphics and vehicle graphics.

We can address your most specific requirements

Given the wealth of film that we offer in the category of window graphics, it is important to be as well-informed as possible when attempting to select the product that best caters to your requirements as an end user or specifier.

That’s why we would always recommend that you contact us at the specification stage, by emailing or calling +44 (0)845 026 1125, so that we can discuss your requirements and assist you in making the best possible choice of window film.

If you turn to us with an interest in frosted vinyl plotter-cut graphics window film, for example, we will be happy to supply our renowned PV900 film that has a finely textured matt finish, can be applied to new or existing glass and provides two-way privacy without seriously reducing the natural light level.

Alternatively, you may be on the lookout for colour vinyl opaque, translucent or transparent plotter-cut window graphics or digitally printed films for window graphics and wall coverings. If this is the case for you, we can put you in touch with suitably skilled professional providers of such films, tapping into the Opalux Market Place.

Opalux is the ultimate user-friendly brand of architectural and automotive window film, and thanks to the network of Opalux installing dealers based across every region of the United Kingdom and Ireland, you won’t need to look far for the highest standard of cost-effective window graphics.

If you don’t like the highly mirrored look of solar reflective films, don’t worry!

There’s no question that the solar control window film in our stock here at Opalux can be instrumental in reducing how much solar heat and glare passes through your glass, as would potentially compromise the comfort of those using your buildings.

However, it is not just practical, but also aesthetic considerations that will guide you when you are shopping for window films, which is why our low mirror solar control films may appeal.

Not every specifier or end user is a fan of the highly mirrored appearance that is typical of solar reflective films. If you are among them, you may be interested in the more neutral look that our low mirror options can give.

Window film that caters to all of your priorities

You may give serious consideration to our lower-mirrored window films because these are the films that may seem to best suit the architecture of the building or the style to which you aspire. These films are metallised, but also have a suitably muted grey or bronze appearance, whether viewed from the inside or outside.

The reflectance level of these films isn’t as high as some alternatives, but they are still effective at controlling the amount of heat and glare experienced by the given building’s occupants. Both interior and exterior weatherable versions of these films can also be specified.

What are your options in this range of window film?

We give you various low mirror window films to choose from here at Opalux. They include our Lower Mirror Neutral Grey 20, 35 or 50 solar control films, which deliver a balanced year-round performance of good solar heat rejection with higher light transmission and a neutral external appearance.

Much the same can be said of our External Sputtered Grey 20 or 35 film, except that it is applied externally rather than internally. Another external window film in this range that may interest you is External Sputtered Bronze 20 or 35, which – as its name suggests – provides a bronze appearance rather than a grey one. We can also offer the internally applied Lower Mirror Bronze 20 or 35 films.

When you are looking to select the low mirrored window film that best suits the application you have in mind, we would always urge you to first get in touch with our technical department, so that we can give you the benefit of our specialist knowledge and experience.

Furthermore, we can also connect you to an Opalux approved dealer who will be able to further assist you in ensuring you invest in the most suitable window film for your requirements. Simply call 0845 026 1125 now for further information and guidance.

In what circumstances might you be interested in our Low-E energy control film?

Considerable energy savings are possible in an air-conditioned building when one purchases from our extensive selection of energy control window film here at Opalux. However, amid the recent unpredictable wintry conditions, it is our all-seasons Low-E films that have particularly caught the eye of many of our customers.

These window films are internally applied solar control films with a Low-E coating added to the interior facing surface. This results in a film that rejects a high proportion of the sun’s heat and glare while enhancing the comfort levels of users in the building and minimising air conditioning costs.

Meanwhile, the Low-E coating is instrumental in reducing winter heat loss through glazed areas, which helps to keep heating bills down and improve the given building’s carbon footprint.

Our Low-E film is a little different to the alternatives

A locally applied Low-E window film may normally seem sufficient for minimising the cold-chill effect experienced by people sitting next to large windows. However, if winter energy savings are to be attained, most if not all windows in a particular area or building with a thermostatically controlled HVAC system will need to be treated.

That’s why customers of Opalux can choose between two options for Low-E window film: a solar reflective film that provides the utmost solar heat reduction and winter heat saving, or a neutral low-mirror film that helps to lower solar heat and glare alongside winter heat savings.

Whether you opt for our Low-E Reflective Silver 20 or Neutral 50 solar control film, you can look forward to such shared benefits as quick, retro-fit installation, the screening of harmful UV rays and low emissivity. These films deliver up to 99% ultraviolet light (UV) filtering while also assisting in the reduction of cooling costs, and therefore Climate Change Levy liability.

The role that these films can also play in alleviating the discomfort caused by excessive heat and glaring reflections off computer screens can even make them a great investment when you are seeking to achieve compliance with the Workplace (Health, Safety & Welfare) Regulations.

Place your order for a wealth of window film

When you are seeking to purchase window film that perfectly matches your practical requirements, and whether you are a specifier or end-user, we would urge you to first consult the Opalux technical department for tailored and informed advice and guidance.

Call 0845 026 1125 or email to find out more about the breadth of window film that we can supply in accordance with your most demanding needs.   

Light management is a sometimes overlooked benefit of window film

There are two broad types of light management window film of which organisations should be aware, and which are both offered here at Opalux – light diffuser films and light blockout films.

What are the benefits of light diffuser films?

When you wish to achieve the best and most uniform diffusion of light across a window or lightbox, our light diffuser film can be an excellent solution.

While you may consider the likes of privacy, solar control or tinted film to perform a similar role to this, standard film in any of these categories may not diffuse the sun’s rays, daylight or artificial light in quite as measured a way as dedicated light diffuser film.

Indeed, you might even go as far as combining a light diffuser film with a heat or glare control film to diffuse the light even more effectively, while also giving the benefit of glare control. The downside of this arrangement is that it will turn the glazing from transparent into translucent, preventing you from looking through the window.

This should help to make clear just how useful light diffuser films can be as privacy films – indeed, the level of privacy provided can be superior even to standard dedicated privacy film. Such light diffuser films from the Opalux range are white and available in the two densities of 30% or 60% light transmission, with the former being denser than the latter.

To completely block out light, choose our light blockout films

Light blockout films very much live up to their name, with their visible light transmission of less than 1%. If you really do need to prevent the passage of almost any daylight or artificial light through a window or lightbox, there can be no better solution than these completely opaque films.

We offer such films in two varieties here at Opalux: white/black films with adhesive on the black face, and black/white films with adhesive on the white face. They are suitable for installation on both the interior and exterior faces of windows and lightboxes.

These films can be invaluable for such specialised settings as theatres, laboratory rooms and museum display areas where there is a need to prevent any daylight coming through the glazing.

Call us about any of our wide-ranging window film

Whether you are specifically seeking light management films or those of any of a wide range of other categories, it is important to first consult knowledgeable professionals – like those of our technical department here at Opalux – if you are to be sure of making the right choice.

Call the Opalux team now, on +44 (0) 845 026 1125, or email for a more in-depth discussion of your options as an end-user or specifier.