Author: Site Editor Publish Time: 2024-02-01 Origin: Site
The knowledge point about adhesives is very interesting and important. Can you distinguish between glass sealant, structural sealant, sealant and weather-resistant sealant? Today I will take you through it again.
The real glass sealant is composed of sodium silicate, acetic acid and organic silicone. It is mainly divided into two categories: silicone sealant and polyurethane sealant (PU). The glass sealant we usually refer to refers to silicone glass sealant. It has superior weather resistance properties such as ozone resistance and UV resistance, giving it a long service life.
Glass sealant is suitable for weather-resistant sealing of various curtain walls, and is especially recommended for weather-resistant sealing of glass curtain walls, aluminum-plastic panel curtain walls, and dry-hanging stone; as well as joint sealing between metal, glass, aluminum, ceramic tiles, plexiglass, and coated glass; Also available for joint sealing on concrete, cement, masonry, rock, marble, steel, wood, anodized aluminum and painted aluminum surfaces. In most cases there is no need to use primer.
2. Sealant
Sealants are usually based on dry or non-drying viscous materials such as asphalt, natural resin or synthetic resin, natural rubber or synthetic rubber, and are combined with inert fillers such as talcum powder, clay, carbon black, titanium dioxide and asbestos. It is made by adding plasticizers, solvents, curing agents, accelerators, etc. The main sealants on the market now include: acrylic, polyurethane, silicone, and polypropylene oxide.
It is an adhesive used to fill configuration gaps and achieve sealing effect. It has the functions of leakage prevention, waterproofing, vibration prevention, sound insulation and heat insulation. Mainly used for various joints that require waterproofing, including exterior wall filling and structure, glass stone prefabricated panels and curtain walls, joints of kitchen and bathroom sanitary ware, etc., as well as various joints that require airtightness, including air conditioning ducts, doors and windows, etc., divided into stone Sealant, anti-mildew sealant, fireproof sealant, pipe sealant, etc.
Weather-resistant adhesive is a single-component, neutral-curing silicone sealant specially designed for weather-resistant sealing of various curtain walls. It has excellent weather resistance. After artificial accelerated weathering testing, the physical and chemical properties of the sealant have not changed significantly.
It can be divided into building sealant, automotive sealant, insulation sealant, packaging sealant, mining sealant and other types. According to the performance classification after construction, it can be divided into two types: curing sealant and semi-curing sealant. Mainly used for weather-resistant sealing of various glass curtain walls, weather-resistant sealing of metal aluminum panels, enamel curtain walls, concrete joint sealing, roof building joint sealing, etc.
Structural adhesive is a kind of high strength (compressive strength>65MPa, steel-steel positive tensile bonding strength>30MPa, shear strength>18Pa), can withstand large loads, and is resistant to aging, fatigue and corrosion, and has a long life expectancy It has stable internal performance and is suitable for bonding structural parts with strong resistance.
Structural adhesive has high strength, peeling resistance, impact resistance, and simple construction technology. Suitable for bonding between metals, ceramics, plastics, rubber, wood, insulating glass and other materials of the same type or between different types of materials. It can partially replace traditional connection forms such as welding, riveting and bolting. The stress on the joint surface is evenly distributed, and there is no thermal impact or deformation on the parts. Structural adhesives are widely used in engineering.
Silicone sealant is divided into two types: acidic and neutral, which are divided into two camps: "sealant" and "structural sealant". Distinguish between glass sealant, sealant, weather-resistant sealant, and structural sealant. Generally speaking, exposed adhesives can be considered to function as sealants. As long as it is an adhesive in indoor components that plays a structural fixing role, it is what we understand as structural adhesive. Both weather-resistant sealant and silicone glass sealant have a sealing effect. Structural sealant has better weather resistance than weather-resistant sealant. Generally, structural sealant is more expensive than sealant.
