請教圖中液體用途

師兄大大，請教下，
Google完都係唔明支野有咩用。
純粹見到好奇問下。

http://www.rcmart.com/sweep-tire ... tinued-p-31165.html

Sweep Racing have developed this new Tire Formula X1, which is a tire cleaner for on road rubber tires. Sold in this 40ml bottle, this low odour substance can also be used as a traction compound for high bite indoor asphalt tracks

宜家啲人多數用BRAKE CLEANER嚟抹呔......
所以呢隻嘢係RCMART係特價貨咁嚟賣。