Do You The Difference of Weatherproof Silicone Sealant And Structural Silicone Sealant?

  Silicone structural sealant can withstand a certain amount of force, and silicone weather resistant adhesive is mainly used for waterproof sealing. Silicone structural adhesive can be used to make a secondary frame, can withstand a certain tension and gravity, silicone weather resistant adhesive is only used as a caulking, can not be used for structural sealing.

  Silicone building sealant is a kind of neutral curing high quality building silicone weather-resistant sealant. Excellent weather aging resistance, high and low temperature resistance -50℃+150℃, good adhesion, it can be extruded under a wide range of climatic conditions, and quickly react with water in the air, curing into durable, high-performance and elastic silicone sealant, which can resist natural erosion such as oxygen odor, ultraviolet light and rain. The main purpose is to seal doors and Windows and building decoration.

  Among the main technical indicators of silicone weather-resistant sealant, the construction performance is characterized by sagging, extrusion, surface drying time, and the displacement capacity and mass loss rate are the main characteristics of weather-resistant sealant after curing. The mass loss rate of weather-resistant adhesive is equivalent to the thermal weight loss of structural adhesive. The performance change of weather-resistant adhesive after long-term use is mainly investigated. The higher the mass loss rate, the more serious the performance decline after long-term use.

  The main role of silicone sealant is to seal the joint between the plates, because the plates are often affected by temperature changes, the main structure deformation and displacement, resulting in joint width will also change. This requires that the weather-resistant adhesive has a good ability to withstand the displacement of the joint, and does not crack in the case of long-term changes in the width of the joint, this performance is called the displacement capacity of the weather-resistant adhesive, which is different from the "displacement capacity" of the structural adhesive.

  Silicone structural sealant is a single component, neutral curing, specially designed for bonding and assembling glass structures in building curtain walls. It can be easily extruded under a wide range of temperature conditions. Rely on moisture in the air to cure into excellent, durable high modulus, high elastic silicone rubber. Products do not need to use primer on glass, can produce superior bonding.

  Structural adhesive finger strength is high (compression strength >65MPa, steel-steel positive tensile bonding strength >30MPa, shear strength >18MPa), can withstand large loads, and aging resistance, fatigue resistance, corrosion resistance, stable performance in the expected life, suitable for strong structural parts bonding. Non-structural adhesive has low strength and poor durability, and can only be used for bonding structural parts due to ordinary and temporary bonding, sealing and fixing.