The difference between structural adhesive and weatherproof adhesive is that structural adhesive is generally used for glass installation, with super high bond strength (and window frames, glass and other firm bond, to ensure safety), elastic modulus is relatively high, and is generally two components (can control a short curing time); Weather-resistant adhesive is generally a single component, more convenient to use, generally used for joint sealing waterproof, low elastic modulus (allow joint displacement), and a variety of materials to bond well (but the bond strength is much lower than the structural adhesive).
The weather resistance of the structural adhesive is as good as the weather resistance adhesive, or even better, because the weather resistance of the structural adhesive is related to safety. If the aging is fast, the consequences of the glass falling are very serious, so now the structural adhesive is basically silica gel (silicone adhesive), and the natural environment will not age. Weather resistance glue does not involve safety, the failure result is generally mainly leakage and air leakage, so the weather resistance glue material type more, including polyurethane, polysulfide, acrylic acid and so on, but the weather resistance is the best silica gel.
Weather resistant sealant
1. Suitable for all kinds of curtain wall weatherproof sealing, especially recommended for glass curtain wall, aluminum plate curtain wall, stone dry hanging weatherproof sealing;
2, metal, glass, aluminum, ceramic tile, plexiglass, coated glass joint sealing;
3, concrete, cement, masonry, rock, marble, steel, wood, anodized aluminum and painted aluminum surface joint sealing. Primer is not needed in most cases.
Silicone structural adhesive
It is mainly used for structural or non-structural bonding assembly between metal and glass of glass curtain wall.
2. It can connect the glass directly with the surface of metal components to form a single assembly component, meeting the curtain wall design requirements of full or half hidden frame.
3. Structural bonding and sealing of insulating glass.
Weatherproof sealant is mainly used for sealing joints between materials, and structural adhesive is mainly used for bonding, and the two are not in the same place. Weather resistant sealant can also be said to be a general adhesive, mainly with uv resistance, acid rain, snow and other extreme weather. Silicone structural adhesive in addition to the characteristics of weatherproof sealant, but also has stronger bonding performance than weatherproof sealant, mainly in tear strength, elongation at break, tensile strength is relatively strong, tensile strength is mainly used in the pre-stress place.
Structural adhesive is used for structural and non-structural assembly bonding of various curtain walls, weatherproof adhesive is mainly waterproof and sealing of joints, the modulus, hardness, strength and price of structural adhesive are higher than that of weatherproof adhesive of the same grade, and the displacement ability of weatherproof adhesive (elastic interpretation) is higher than that of structural adhesive.
You can't mix the two. Sealing place with structural glue is a high cost, two is not conducive to the displacement of the joint change. Should be used in the structural glue is not a weather glue.