Kerosene can be used to soften tires two to three days before a race by doing the following:

Soften. Use a protein treatment or deep conditioner for about 15 minutes, as the living proof restore shampoo and conditioner. To become soft, or to make something soft: Soften, usually by steeping in liquid, and cause to disintegrate as a result.

To become less hard or firm or to make (something) less hard or firm. To become soft, or to make something soft: But because they don’t actually soften water, you won’t be able to tell from a water test whether or not your conditioner is working.

Soften ý nghĩa, định nghĩa, soften là gì: Soften the cheese by warming it in the oven. Make less rigid or softer.

This liquid will soften your laundry To make soft or softer. Make (images or sounds) soft or softer;

Britannica dictionary definition of soften. A substance, such as a zeolite, for softening water. The bread will soften if you pour some liquid on it;

When applying, soak the tires in water first. Beef (up), fortify, strengthen soften: To weaken the military resistance or the morale of especially by harassment (such as preliminary bombardment) —often used with up.