The difference between car wash liquid and pre-wash liquid

When the car body is covered with sediment, PA pre-wash and two buckets of water are usually used to clean the car. When choosing a cleaning agent, there is often a question. Can the car wash liquid be used as a pre-wash liquid, which is also a foam detergent? To understand this problem, you must first understand the difference between a pre-wash liquid and a car wash liquid.

"Pre-wash" the car body before washing

PA pre-washing is to spray a layer of pre-wash liquid directly on the car body while it is still dry and covered with sediment. Let it hang for one to two minutes, and then use a fan-shaped high-pressure water gun to flush away the pre-wash liquid and the sediment that can be taken away.

The purpose of PA pre-washing is to loosen sediment and dirt so that more of it can be washed away and reduce the risk of friction during the scrubbing process. Therefore, an effective pre-wash needs to have active functions such as powerful emulsifiers and penetrants.

Safe car washing method with two buckets of water

The design concept of car washing liquid is to provide excellent lubrication performance for the car washing gloves and the surface of the car body when wiping the car body, helping us to complete it safely Scrubbing job. An excellent car wash liquid needs to have sufficient lubricity, good solubility, cleaning performance, and even safety against waxes and sealants.

From the perspective of function, the pre-wash liquid initially softens the sediment. Car wash liquid provides rich foam and cleaning ability, allowing us to minimize the damage to the paint surface caused by sediment particles when scrubbing the car body with car wash gloves. Pre-wash fluid is sticky-slip, while car wash fluid is lubricating.

So the two detergents are not substitutes for each other. If the PA pre-washing effect is not good, even if the car is washed with two buckets of water, the harm of wiping the car body will still be huge.

How to improve the PA pre-wash effect

1. The foam of the pre-wash solution should be moderate

A foam that is too thin will run off too quickly and the action time will be shortened; Thick foam cannot fully infiltrate and the effect is compromised.

2. Carry out local cleaning in advance

Although PA pre-washing does not require scrubbing, the wheel well, tires, wheel hubs and chassis can be rinsed during the waiting period. Do not wait until the pre-wash is completed to avoid contaminating the car body with splashes again.

3. Multiple pre-washes

When the sediment on the car body is too heavy or the PA pre-wash effect is not obvious, you can perform the PA pre-wash again (if only the local effect is not obvious, You can also do a separate PA pre-wash on the local area).

4. Improve the anti-adhesion ability of the car body

Just like non-stick pans and ordinary iron pans are both made of iron, the reason why non-stick pans are called non-stick pans is because of their Anti-adhesion ability, this ability comes from a non-stick coating on its surface.

With regular waxing and sealing, the sediment can be easily washed away, and it can also reduce the occurrence of many small scratches and sun marks.

5. Perform PA pre-washing after the car paint naturally cools down

If the high-temperature paint surface is sprayed with water to cool down, the paint surface will shrink violently, and some ultra-fine and nano-scale dirt will quickly Suction into paint pores or embedded in wax.

When you apply foam, those pollutants cannot be easily washed away, but your efforts are in vain.