Product Review: Mantis Fast Glass

Mantis Fast Glass
Mantis Fast Glass car window cleaner

Disclosure: I received free review samples from JML for the purpose of this review. I received no payment and was not required to submit a positive review.

Back in 2010, I reviewed Mantis Instant Shine, one of the first waterless car wash products to go on sale on the high street in the UK. Despite our watery climate, waterless wash products (which are basically a spray-on, wipe-off car cleaning solution) are becoming increasingly popular and work surprisingly well.

I recently received a sample bottle of the latest Mantis Performance product, Mantis Fast Glass. As the name suggests, Mantis Fast Glass is a glass cleaner that’s suitable for use on both glass and plastic windows, such as those found on caravans and motorhomes.

This product also claims to leave a rain-repellent layer on your car’s windows that will make rain water simply bead off, keeping the window clear of rain or snow, and ensuring that it dries smear free.

Rather confusingly, Mantis has chosen the same name for its product as Autoglym, which has sold a glass and plastic cleaner called ‘Fast Glass’ for many years.

Cleaning power

Having put my bottle of Mantis Fast Glass to the test on some fairly dirty and greasy windows, I can truthfully say that it works as described. Spray on, and wipe off — you don’t need much buffing, just let it dry to a smear-free finish.

For windows that are particularly grimy, you may need a couple of applications to get rid of all the smears, but it’s quick and easy to use and only requires a microfibre cloth to give a good result.

The real test of a glass cleaner is usually on the inside of a car’s windscreen, which gets covered in an oily, cloudy film over time, thanks to the dirty air that gets pulled through your car’s heater vents and pumped out for you to breath! If you don’t believe me, then try cleaning the inside of your car’s windscreen and windows to a smear-free finish — it’s much harder than doing the outside of the windows and rarely gets done so often.

Mantis Fast Glass coped with the greasy interior glass well, although a few extra squirts were required to get rid of stubborn smears.

Rain repellent?

I haven’t had the opportunity to drive in the rain much since I used Mantis Fast Glass, but water beads off my car’s windows when they are wet and they have dried smear-free after several rain showers while it has been parked up, which is a good sign.

I’m not sure that Mantis Fast Glass will provide such a powerful water-repellent effect as a dedicated rain repellent product like Rain-X, which has to be applied by hand and buffed to a finish, but its a good, quick-to-use alternative. I only tend to use products like this on the side windows of my car, as I don’t like the mist effect that follows the wiper blades after the windscreen has been treated.

All in all, Mantis Fast Glass does what is promises and is easy to use. My only real quibble with Mantis Fast Glass is its price — at £9.99 for a 500ml bottle, I’m not sure it is worth the premium over good quality alternatives such as Rain-X Glass Cleaner & Rain Repellent, which Halfords sells for £7.99. Verdict:

Mantis Fast Glass does what it promises to do, but there are cheaper products that work just as well.

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