Selection and characteristics of rubber material are rubber hose during use subject to external forces and prolonged contact with a variety of soil, water. Therefore, the requirements of a rubber material must have excellent flexibility, compression, high tensile strength, elongation, and wear and tear of high performance, wide temperature range. Some products also requires alkali-resistant garden, salts and other inorganic and resistance to various mineral oils, animal and vegetable oil, used in underground engineering must also have some anti-Xia performance. - Like a big rubber commonly used natural rubber, styrene-butadiene rubber, chloroprene rubber, EPDM rubber, its main characteristics are shown in Table 3-5-4. Grouting buried water stop joints are widely used in construction, bridge construction deformation joint expansion joints, it is having detection, water stop grouting repair characteristics; the product is applicable to all underground water, drainage structures construction projects, such as retaining dams, reservoirs, subway tunnels, basement. The greatest feature is detectable, can grouting repair, which is the traditional water stop in the process of waterproof biggest weakness, even though no matter how good waterproof performance Deformation water stop during the construction and construction joints, if construction quality standards, water can still benefit from the gap between the oozing water stop and concrete, causing leakage; additional joint quality Sealing construction joints difference is caused mainly due to leaking. Selection and characteristics of rubber hose rubber materials are in the process of applying external force to have been in contact with a variety of effects and long-term soil quality, water quality. Therefore, it is necessary rubber material with excellent elasticity, compressive strength, tensile strength, elongation, and wear and tear function of high temperature use planning wide. Some products also need to park alkali resistance, and resistance to various inorganic salts and other mineral oils, animal and vegetable oil, used in underground engineering are also necessary to have some anti-Xia function. - Like a big rubber commonly used natural rubber, styrene-butadiene rubber, chloroprene rubber, EPDM rubber, its main characteristics are shown in Table 3-5-4. Grouting buried water stop joints are widely used in construction, bridge construction deformation joint expansion joints, is having a view, you can water stop grouting repair characteristics; the product is suitable for all underground water, drainage structures construction projects, such as retaining dams, reservoirs, subway tunnels, basement. The most important feature is that you can view, be grouting repair, which is a traditional water stop the biggest flaw in the process of waterproof, waterproof function even better water stop during the construction process of deformation joints and construction joints, if substandard construction quality, water still can water stop and concrete from the gap between the oozing, resulting in leakage; poor quality of other water-stop connector is the main reason causing leaking seam construction. December 31, 2014, AQSIQ, the State Standardization Committee to deal with the 2014 No. 33 bulletin released the composite rubber national referral criteria "composite rubber common technical standards", the standard number of GB / T 31357-2014. The standard will be officially implemented on July 1, the current transition period. The standard is the most attention is the introduction of a composite rubber gum containing not exceed 88% of the rules, after this rule has resulted in a wide range of controversial industry. This standard by the National Rubber and rubber products natural rubber Standardization Technical Committee Technical Committee (SAC / TC 35 / SC 8) centralized. Drafted by: Institute of Agro Chinese Academy of Tropical Agriculture, Hainan State Farms base Inspection Station, People's Republic of China Huangpu Exit Inspection and Quarantine, Shun Ho Hangzhou Rubber Engineering Co., Ltd., China National Petroleum Petroleum Chemical Research Institute Co., Ltd., Hainan natural Rubber Industry Group Co., Ltd., Yunnan Agricultural Reclamation Group Co., Ltd., Guangdong Province, widely cultivated Rubber Group Co., China Chemical Rubber Company.