Windshield Washer Fluid: Definition, Characteristics, and Price

Windshield Washer Fluid: Definition, Characteristics, and Price
Windshield Washer Fluid: Definition, Characteristics, and Price



    – Windshield washer fluid: what is it?

    – Windshield washer fluid tablets: what are their advantages?

    – Use of windshield washer fluid: what are the restrictions?


The splashes of heavy vehicles on your car windshield in rainy weather are very annoying! Fortunately, the windshield washer system is there… until the washer fluid runs out. The only solution is to refill it with the 5-liter can (if you haven’t forgotten it), placed behind all your carefully and methodically stacked vacation luggage. It’s not easy… Fortunately, there is a solution: windshield washer tablets. 

What are windshield washer fluid tablets?

Windshield washer tablets are effervescent tablets 20 mm in diameter, weighing 5 grams each, diluted in water to produce a sufficiently effective windshield washer fluid.

Their exact composition is impossible to obtain from the manufacturers. According to them, they are made of an effervescent agent and mineral salts, are “99% biodegradable”, are free of methanol, ethanol, and phosphates, as well as “active ingredients of the latest generation”, a term that is providential not to reveal more about their constitution.

Windshield washer tablets: what is their interest?

Windshield Washer Fluid: Definition, Characteristics, and Price


This is the first and authentic argument: the bag of 3 tablets exists (equivalent to 10 to 15 liters of windshield washer fluid) and can easily be placed in the glove compartment, the car door, or any other accessible storage space, which gives its size and weight a definite advantage.

In theory, a tablet can easily replenish the windshield washer fluid supply when added to tap water or any other water supply.

Economic aspect

The least good packaging of 3 pellets in a bag costs, on average, $1.60 per pellet, roughly equivalent to 5 liters of windshield washer fluid.

Since the traditional 5-liter can cost $2, or 20% more, the tablets are less expensive, especially if you buy them in quantity (for a 200-tablet can, the cost is $0.50/tablet).

Ecological aspect

Windshield Washer Fluid: Definition, Characteristics, and Price

Based on what the manufacturers say, we can only comment on the absence of phosphates and ethanol.

Anti-limescale agents (to treat tap water) suggest that the tablets contain some aggressive products.


Like all windshield washers, the tablets effectively clean the windshield of grease, dissolve insect traces, do not attack the seals or paint, and do not block the pipes.

Use of windshield washer tablets: what are the restrictions?

Windshield Washer Fluid: Definition, Characteristics, and Price

Although these tablets have many advantages, you should take some precautions.


Store large quantities, even if it is more economical, is not recommended. Indeed, their effervescent character requires hermetic storage in a dry atmosphere.

The problem is the same for small package bags: once the bag is opened, transferring the remaining pellets into a metal tube-type packaging (medicine packaging) is preferable.

Water supply

Although manufacturers indicate that the source and quality of the water are of minor importance, it is nevertheless more prudent to use, when possible, demineralized water ($1/5 l), which will avoid possible calcium deposits in the pipes.

Winter use

Although some tablets are qualified as “frost-proof “* (protection for temperatures from – 3°C to – 5°C), this protection index is insufficient for safe use in winter.

It is necessary to use the traditional winter windshield washer during these periods.

“In this case, the tablets contain a proportion of methanol or ethanol…


Because of their appearance, reminiscent of candy, it is important to put them out of reach of children.

Note: there is an alternative to pastilles. There are many recipes for natural homemade products to replace commercial cleaning products. This is also true for windshield washer fluid in general: homemade dishwashing liquid, water, and vinegar will do the trick.

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