Why Polycarbonate Windows

Should you upgrade your glass windows for polycarbonate?

If you’re building a serious track car or prepping for your next weekend at the circuit, switching to polycarbonate windows isn’t just a style move—it’s a genuine performance upgrade.

Back in the day, cars used flat plate glass for windscreens and side windows. It did the job—kept the weather out and bugs off your teeth—but it shattered dangerously in a crash. Laminated safety glass eventually took over, staying in one piece when broken and becoming the standard on every road car.

But on the track, the priorities change. Shatter resistance matters, sure—but so does weight, strength, flexibility, and the ability to swap parts quickly when you’re in the pit lane, not the driveway. That’s why polycarbonate windows have become the clear choice for racers across all levels.

What makes Polycarbonate so effective?

Polycarbonate is a clear, lightweight thermoplastic that’s used everywhere from helmet visors and safety shields to military vehicles and aircraft windows. In motorsport, it delivers exactly what you need: strength, lightness, and dependability under pressure.

Unlike acrylic or Perspex, polycarbonate can take a beating without cracking. It handles heat better, holds its shape under stress, and is far easier to cut, drill, and mount than glass. It’s also incredibly lightweight—roughly half the weight of traditional automotive glazing.

You’ll notice the difference on your first lap. Better balance, sharper response, and one less thing to worry about when you’re hard on the brakes into Turn 3.

Why it’s a real-world upgrade

Polycarbonate windows don’t just shave off grams—they reshape how your car performs. Remove glass and the associated hardware—regulators, motors, seals—and you lose serious weight. That’s free speed. And if your racing series requires window removal or replacement for safety reasons, polycarbonate keeps you compliant.

Our front windows are designed for practicality too. Quick-release pins mean you can pop them in or out between runs—ideal for keeping dust out during transport or letting the cabin breathe during setup.

They’re not waterproof in the OEM sense, but they’ll keep the weather at bay far better than nothing at all. Add sliders or NACA ducts, and you’ve got airflow, comfort, and control that works with your setup—not against it.

What about DIY builds?

You can build your own polycarbonate windows. People do. But here’s the reality:

Cutting clean lines without clouding or chipping takes experience (and the right tools)
Making an accurate template off old glass is harder than it sounds
Sheets come in big slabs, and you’ll waste material if you’re only doing one car

If it’s a race build, why take chances? Our kits are made to fit, finished properly, and built with racing in mind from the start.

Why use professional polycarbonate windows?

With nearly 40 years of experience, we know what works. Every window is cut to spec, finished by hand, and checked for proper fitment before it leaves our UK facility.

We offer 4mm standard polycarbonate and 5mm FIA-compliant options, plus clear, bronze, and grey tints. Want airflow? Add sliders. Need something custom? No problem.

Polycarbonate windows aren’t just a weight-saving tweak—they’re a smarter, stronger, more practical solution for anyone building a car to push hard and go fast.

Windows built for racing

Browse our product ranges:

Looking for windows?
Lightweight impact resistant polycarbonate racing windows for all major vehicle brands and models, available in full kits or individually.
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Need a slider kit?
Our easy retro fit window slider kits are the essential addition to your racing windows with standard and advanced kits available.
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Replacing mud flaps?
Browse our range of mud flaps available in a range of of colours to find the right under belly protection for your rally car's look.
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