本产品专为除去顽固污渍这特效产品，对一系列的石材烟气化造成的污渍尤见效能（此产品强度比BERT-27度数高，使用前要先小部份试用后才用） 使用方法：先用清水把本品稀释，然后用刷子、滚筒器或喷雾器涂在污处，严重的污渍不用稀释，涂上污处时间不要太长，清洗后注意过清水。 UB 58 STRONG CLEANING FOR GRANITE This is a product special for cleaning the obstinate spots, especially due to fireworks It is better than BERT-27, you must use a little to try first. Application: Dilute in water first, then spread on the spot with machine, if the spot is very serious, do not dilute and do not last too long, then clean it with water.