Weathering glue, structural glue, and sealant are all adhesives, which are widely used in the construction, decoration and other industries, but they differ in performance, use, etc.:
1. Different performance characteristics
1. Weathering glue: single component, neutral curing, specially designed for various curtain wall weathering seals, with excellent weather resistance, after artificial accelerated climate aging test, various physical and chemical properties have no obvious changes. The displacement capacity reaches 20 levels, and the normal expansion and shear deformation of the curtain wall can maintain the performance unchanged, and play an effective sealing role; it also has the advantages of aging resistance, UV resistance, ozone resistance, water resistance, high and low temperature resistance, etc. After curing, it will not become brittle, harden or crack at a low temperature of -30℃, and will not soften or degrade at a high temperature of +90℃, and always maintain good elasticity. In addition, it is non-corrosive to building materials such as metal, coated glass, concrete, marble, granite, etc., and has excellent adhesion. After curing, it forms a strong bond with most building materials without the need for primer, and has good compatibility with other neutral silicone glues.
2. Structural adhesive: high strength (compression strength> 65mpa, steel-steel positive tensile bonding strength> 30mpa, shear strength> 18mpa), can withstand large loads, and is resistant to aging, fatigue, and corrosion, with stable performance within the expected life. After curing, it has high modulus performance and can carry the interface's ±25% telescopic displacement capacity. It has excellent bonding properties, does not require primer, and can form a strong bond with most building materials.
3. Sealant: Usually made of dry or non-dry viscous materials such as asphalt, natural resin or synthetic resin, natural rubber or synthetic rubber, etc., combined with inert fillers such as talcum powder, white clay, carbon black, titanium dioxide and asbestos, and then added with plasticizers, solvents, curing agents, accelerators, etc. It has the functions of anti-leakage, waterproof, anti-vibration, sound insulation, heat insulation, etc. It can prevent gas, liquid, solid from penetrating, and prevent structural materials from being destroyed when the structure is displaced, thereby playing the role of heat preservation, sound insulation, waterproof, dustproof, gas proof, fireproof, corrosion-resistant, shock absorption and preventing the accumulation of foreign matter in the joints.
2. Different uses
1. Weather-resistant adhesive: Mainly used for weather-resistant sealing of various glass curtain walls, such as weather-resistant sealing of metal (aluminum plate) and enamel curtain walls; joint sealing of concrete, metal, etc. and roof building joint sealing, etc. It is often used in places with higher requirements in engineering occasions, such as sealing gaps between metal and concrete building walls, sealing glass curtain walls, etc.
2. Structural adhesive: Suitable for bonding structural parts that bear strong forces, and can be used for bonding between the same materials or different materials such as metal, ceramics, plastics, rubber, wood, hollow glass, etc., and can partially replace traditional connection forms such as welding, riveting, and bolting. It is widely used in engineering, mainly for the reinforcement, anchoring, bonding, and repair of components, such as bonding steel, bonding carbon fiber, planting steel bars, crack reinforcement, sealing, hole repair, spike pasting, surface protection, concrete bonding, etc.; it is also used for the structural or non-structural bonding assembly between metal and glass of glass curtain walls, which can directly connect the glass to the surface of metal components to form a single assembly component, meet the design requirements of curtain walls with full or semi-hidden frames, and can also be used for the structural bonding and sealing of hollow glass.
3. Sealant: Mainly used to fill the gap of the configuration to play a sealing role. It can be used for various seams that need waterproofing, including exterior wall filling and structure, glass stone prefabricated panels and curtain walls, kitchen and bathroom sanitary ware joints, etc., as well as various seams that need airtightness, including air conditioning pipes, doors and windows, etc., which are divided into stone sealants, mildew-proof sealants, fire-proof sealants, pipe sealants, etc.