Acrylic resins that clog the pores of the glass

All surfaces, including glass, have a certain porosity, although at first glance it may seem we do not, and this is very subtle. The rain repellent products for crystals are normally containing a liquid including substances certain transparent acrylic resins or polymers which adhere to the glass surface, filling the pores and forming a durable film outdoors (for a while) .

This movie can come to perceive touch, because the softer and smoother than before, or in other words, more glass stick note. And thanks to the falling water film on the glass slide much more easily: so you have the repellent effect.

To give us an idea we could think of a wooden floor wax applied to it. Think wood is unvarnished, even if it is well sanded, smooth and soft, remains porous and absorbs any liquid. If the wood is applied a thick layer of wax, this clog pores and makes it softer, and even slippery and repels liquids (to some extent). Something like that is what happens with these repellents.

Water droplets slide more easily

Repellent products rainwater can be applied on all car windows, and act by simple gravity. Rain falling on them drops will slide much more easily than if the glass did not take anything. Where all are more effective ways it is on the windshield, since the circular air flow which is formed as we climb speed, dragging the better raindrops outside. From about 80 or 90 km / h is when they start to work very well.

The advantage is that rain repellent improve visibility through the windows of the car. And the better see what happens on the road, we drive safer. The effect produced is like watching slide drops of liquid mercury surface. In the case of a windshield may be needed not turn the wiper to divert rainwater because the repellent effect and it looks pretty good.

Are they better than a brush in top shape? There is no reason to say that, it’s rather a matter of taste. There will be drivers who prefer to use the wiper blades, and others who prefer to take a repellent applied. Inadvisable course not.

There are different brands of repellent products rainwater from known brands to something cheaper private labels. We will not speak of any specific, but typically cost between 7 and 18 euros the boat, giving for various applications. Most products are so repellent that, but some may include two brand products, glass cleaner, and then spray the product itself (some marches sometimes called sealant).

These products can be applied in a workshop specialized in car windows and glass, or can also be applied by yourself at home.

It is important to use it well: you must first clean the glass well with a glass cleaner with alcohol, which degreasing and remove any dirt from the glass. Clean and dry, the product throughout the glass with a soft cloth will apply, for example cotton. Should wait about 10 or 15 minutes for the product to dry and form a film. You can return to give a second coat if desired. After waiting another 10 or 15 minutes the excess with a clean, dry cloth will retire, to polish the glass.

As a precaution, because better safe, should not apply the product on the brush because you cannot then sweep the pane. It should also rinse with water the cloth that was used to apply the product.