Polyurethane Sealant ST11

Description ST11 is a one-component adhesive and sealing compound of permanent elasticity. It is based on a special moisture-cured polyurethane with an accelerated curing time. Uses1)ST11is used for sealing and waterproof for sanitary fixture, roof and underground construction. 2)Its used for sealing joints for bridge, tunnel, culvert, hydraulic engineering and other constructions. 3)Its used for sealing joints for roof, drain, water pipes, reservior, water tank and silo. Advantages *Excellent adhesion on all cement-based materials, brick, glazed brick, metal, wood, etc. *Neutral,no pollution and curing under normal temperature. *Poisonless and anti-mould. *Excellent durability. *Abrasion resistant, anti-penetration and tearing. *Resistant to aging and weather exposure. *No dripping. *Ready-to-use. *Can be painted. *No corrosion. Instructions for use Surface preparation Keep surface clean. Clean all dirty, dust, loose particles and paint. Joints can be cleaned by compressed air. The filling material in the joints must be polythene. Priming Use specified primer on concrete and porous surface. Application *Stick protecting adhesive tape on both sides of the joints. *Insert filling materials. *Use the sealant with manual caulking gun or aerodynamic caulking gun. Horizontal seal can be finished by spatula. *Smooth with synthesized cleaner mixed by clean water if necessary. *Tear off the protecting adhesive tape befor the sealant is curing. *Clean all the tools after operating. The curing materials can be only cleaned by machinery methods. Joint Design For the successful sealing of joints with ST11, it is essential that the following guidelines on joint configuration are observed: General Use: for joints up to 12mm wide, width to depth ratio=1:1 for joints over 12mm wide, width to depth ratio=2:1 To ensure that the correct width to depth ratio is achieved and to provide a firm backing against which the sealant can be tooled off and also to prevent the sealant from adhering to the bottom of the joint, the space under the ST11 must be filled with a tight fitting,non-rotting,non-absorbent backing material ,such as closed cell PE backer. Technical Data (Typical) ST-11LM ST-11MM ST-11HM Colours Gray,White,Black Density 1.20-1.40kg/L Skinning time 45-120mins, depending on weather Curing Rate ≥2MM/24h Hardness,Shore A 15 25 35 Modulus100% Elongation <0.4MPa 0.4-0.6MPa >0.6MPa Tensile Strength at break ≥0.8 Mpa >1.5 Mpa >2.0 Mpa Elastic Recovery >80% >90% >90% Elongation at break >800% >800% >800% Tearing Strength >5N/mm >9N/mm >11N/mm Application Temperature 5-40 Service Temperature -40-+80(maximum50 in hot water) Shelf life 9 months stored dry below 30 unopened in original containers