Silicone structural sealant

1. Silicone weather-resistant sealant Among the main technical indicators of silicone weather-resistant sealant, the ones that characterize the construction performance are sag, extrusion, and tack drying time. The main ones that characterize the performance of the weather-resistant sealant after curing are displacement capacity and mass loss rate. The mass loss rate of weather-resistant adhesive is equivalent to the thermal weight loss of structural adhesive. The main purpose is to examine the performance changes of weather-resistant adhesive after long-term use. The higher the mass loss rate, the more serious the performance decline after long-term use. The main function of silicone weather-resistant sealant is to seal the joints between plates. Because the plates are often affected by temperature changes, deformation of the main structure, etc., the width of the joints will also change. This requires that the weather-resistant adhesive has good ability to withstand joint displacement and does not crack when it withstands changes in joint width for a long time. This performance is called the displacement capacity of the weather-resistant adhesive, which is the same as the "displacement tolerance" of the structural adhesive. different.

2. Silicone structural sealant Silicone structural sealant is a single-component, neutral-curing, specially designed for the bonding and assembly of glass structures in building curtain walls. Can be easily extruded for use in a wide range of temperature conditions. Relying on moisture in the air to solidify into excellent, durable high-modulus, high-elastic silicone rubber. The product does not require primer on glass and can produce excellent adhesion. Structural adhesives have high strength (compressive strength>65MPa, steel-steel positive tensile bonding strength>30MPa, shear strength>18MPa), can withstand large loads, are resistant to aging, fatigue, and corrosion, and perform well within the expected life. Stable and suitable for bonding structural parts that can withstand strong forces. Non-structural adhesives have low strength and poor durability. They can only be used for ordinary and temporary bonding, sealing and fixing, and cannot be used for bonding structural parts. The service life of construction projects is generally more than 50 years. The components bear large and complex stresses, which are directly related to the safety of personnel and property. Structural adhesives should be used for bonding glue. Structural adhesives are widely used in engineering. They are mainly used for reinforcement, anchoring, bonding, and repair of components; such as steel bonding, carbon fiber bonding, reinforcement, crack reinforcement, sealing, hole repair, road spike pasting, and surface protection. , concrete bonding, etc.