Features: It has low hardness and high elasticity. It can work in air with a temperature of -35～+60oC under high pressure. Uses: Suitable for punching and gaskets with good impact resistance and good sealing performance. Acid and alkali resistant rubber sheet: Features: medium hardness, acid and alkali resistance. It can work in a 20% acid (alkali) liquid with a temperature between -30 and +60 °C. Uses: It can be used to make a variety of gaskets with good sealing performance with acid and alkali resistance. It is suitable for punching various shapes of gaskets. Concrete Plasticizer retardant,super plasticizer in concrete,superplasticizer admixture for concrete,concrete superplasticizer additive,plasticizers in concrete Shanghai Hongyun New Construction Materials Co., Ltd , https://www.hongyunpce.com