Car Wax & Paint Sealant
What are they?
Car wax is generally made with one key ingredient: carnauba wax. There are also other synthetic waxes as well, but they all serve the same purpose.
The wax is basically a barrier of protection for your car. It should go on last on a car (let's say after polishing) to provide an extra barrier over your clear coat. The wax will make the surface of your vehicle hydrophobic and water will slide straight off. Of course, the product will give your paintwork a nice, warm glow and bring out the paint's depth and intensity.
However, car wax has it's downsides as it isn't durable as paint sealant. Especially on the hottest summer days, the wax will evaporate over time and it's protective properties will be lost.
Paint sealant is not natural and has been engineered to provide the best possible paint protection similar to wax. It serves the same purpose as car wax and will protect against heat, UV rays, contaminants, pollutants, debris, and more (like the wax).
Sealants are becoming more popular as they are the better protective coating and still makes the car shine and reflective (different from the softer look of wax).
Basically, it is up to the preference of the owner to go with wax or paint sealant.