The difference between weather-resistant glue and glass glue

1. The difference between structural adhesive and weather-resistant adhesive is that structural adhesive is generally used for glass installation, and has ultra-high bonding strength (firmly bonded with window frames, glass, etc.). Ensure safety), high elastic modulus, generally two-component (curing time can be controlled shorter); Weather-resistant adhesive is generally a single component, which is more convenient to use. Generally used for joint sealing and waterproofing, it has low elastic modulus (allowing joint displacement to be large) and good bonding with various materials (but the bonding strength is much lower than that of structural adhesive).

The weather resistance of structural adhesive is as good as or even better than that of structural adhesive, because the weather resistance of structural adhesive is related to safety. If the glass falls quickly, the consequences will be very serious, so the current structural adhesives are basically silica gel (silicone adhesive), which will not age in the natural environment. Weather-resistant adhesive does not involve safety, and the result of failure is generally water leakage, so there are many kinds of weather-resistant adhesive materials, including polyurethane, polysulfide, acrylic acid and so on. But silica gel has the best weather resistance.

Weathering sealant?

1 Suitable for weatherproof sealing of various curtain walls, especially for glass curtain walls, aluminum-plastic curtain walls and stone dry hanging; ?

2. Joint sealing between metal, glass, aluminum, ceramic tile, plexiglass and coated glass; ?

3. Joint sealing of concrete, cement, masonry, rock, marble, steel, wood, anodized aluminum and painted aluminum. Primer is not needed in most cases. ?

Silicone structural adhesive?

1 Mainly used for structural or non-structural bonding assembly between metal and glass of glass curtain wall. ?

2. It can directly connect the glass with the surface of the metal component to form a single assembly component, which meets the design requirements of the fully hidden frame or semi-hidden frame curtain wall. ?

3. Structural bonding and sealing of insulating glass. ?

Weather-resistant sealant is mainly used for sealing and caulking between materials, and structural adhesive is mainly used for bonding, and they are not used in one place. Weather-resistant sealant can also be said to be a general adhesive, which mainly resists extreme weather such as ultraviolet rays, acid rain and snow. Silicone structural adhesive not only has the characteristics of weather-resistant sealant, but also has stronger adhesion performance than weather-resistant sealant, mainly in stronger tear strength, elongation at break and tensile strength, and the tensile strength is mainly used in prestressed places.

Structural adhesive is used for structural and non-structural assembly bonding of various curtain walls, and weather-resistant adhesive is mainly used for waterproof sealing of joints. The modulus, hardness, strength and price of structural adhesive are higher than those of the same grade products, and the replacement ability of weather-resistant adhesive is higher than that of structural adhesive.

The two cannot be confused. The cost of structural adhesive used in sealed places is high, which is not conducive to the displacement change of joints. Where structural adhesive should be used, weather-resistant adhesive should not be used.

reference data

Building materials network China: