hi... is this for the tank to be squirted onto the windscreen? thanks

This Prestone product is indeed for your windscreen-washer bottle and you should add it NEAT to the washer bottle. If there's no water in the bottle, you'll get protection down to minus 10 degrees C; if there's some water there, you'll dilute the Prestone and protection will not be as good. The Prestone formulation comes out very well in independent car-magazine tests, so it's a good product and, importantly, it doesn't smell like cheap perfume inside the car when you're using the windscreen washer on a journey (others do!). DO NOT CONFUSE Winter SCREEN Wash with Prestone's Antifreeze Product which is meant to be added to your car's radiator to prevent your circulating engine-coolant water from freezing and cracking your engine. As always in life, 'READ THE LABEL' on the container. SCREENWASH is for WindSCREENS : ANTIFREEZE is for your car's ENGINE!! Sorry to be like a schoolmaster but..... Hope this helps!

Can it be used undiluted in the summer?

I'd imagine you'd dilute it more during the summer and neater in the winter.

Is this suitable for car with headlamp washer

Used it in my car for the past 2 years and can not see why not.

Is the product ready to use or does it need diluting with water?

It depends on the time of year you will be using it. The directions suggest using neat during winter, a ratio of 1 part screen wash to 9 parts water in autumn and 1/19 in spring and summer.

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Prestone Screenwash Concentrate 5L, Screen Wash For Cars - Winter, High Performance Cleaning With Streak Free Formula, Extreme Performance Super Concentrated Screenwash Winter, Reduce Plastic, 5 Litre

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💧Super concentrated formula

🚗Streak-free, high performance clean

❄️Melts ice down to -18°C

Description

❄️ Drive Clear, Drive Confident: The Ultimate Screenwash Upgrade

TRUSTED LEGACY - Backed by 90+ years of automotive expertise for reliable performance
EXTREME COLD READY - Melts ice down to -18°C, keeping your windshield clear in harsh winters
CRYSTAL CLEAR VISION - Guaranteed streak-free finish for safer, stress-free driving
SUPER CONCENTRATED POWER - Dilute to your needs—strong enough for winter, efficient for summer
YEAR ROUND WEATHER WARRIOR - Tackles dirt, ice, and sun dazzle in any season

Prestone Extreme Performance Screenwash Concentrate is a 5L super-concentrated windscreen washer fluid designed for year-round use. It melts ice down to -18°C, removes stubborn dirt with a streak-free finish, and can be diluted seasonally for optimal performance. Trusted for over 90 years, it ensures safer driving in all weather conditions.

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Manufacturer	Prestone
Brand	Prestone
Model	Extreme Performance Screen Wash
Package Dimensions	28 x 18.5 x 13.4 cm; 4.94 kg
Item model number	PSCW0028A
Manufacturer part number	PSCW0028A
Special Features	Concentrated
Item Weight	4.94 kg

Prestone Screenwash Concentrate 5L, Screen Wash For Cars - Winter, High Performance Cleaning With Streak Free Formula, Extreme Performance Super Concentrated Screenwash Winter, Reduce Plastic, 5 Litre

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