Silicone structural sealant Silicone weather resistant sealant difference and use

Construction Sealant Standard: GB

16776-2005 Silicone Structural Sealant for Construction, Silicone Structural Sealant is a one-component, neutral-curing, specially designed for the bonding and assembly of glass structures in building curtain walls. It can be easily extruded and used in a wide range of air temperatures. Relies on moisture in the air to cure into excellent, durable, high-modulus, high-elasticity silicone rubber.

The product does not require a primer for glass and can produce superior adhesion.

The structural adhesive refers to high strength (compressive strength: 65MPa, steel-steel tensile bonding strength: 30MPa, shear strength: 18MPa), can withstand large loads, and is resistant to aging, fatigue and corrosion, stable performance in the expected life, and is suitable for bonding structural parts with strong strength. The non-structural adhesive has low strength and poor durability, and can only be used for bonding structural parts due to the bonding, sealing and fixing of ordinary and temporary properties.

2: Silicone weather-resistant sealant: Silicone weather-resistant sealant.

Among the main technical indicators of silicone weather-resistant sealant, the sagging, extrusion, and surface drying time are characterized by the construction performance, and the displacement capacity and quality loss rate are mainly characterized by the performance of the weather-resistant adhesive after curing. The ultraviolet aging (light) of the product is very high, and the standard requires 7500h.

1. Silicone weather-resistant sealant is mainly used for sealing and caulking between materials, while silicone structural sealant is mainly used for bonding, and the two are not used in the same place.

2. In addition to the characteristics of weather-resistant sealant, silicone structural adhesive also has stronger bonding performance than weather-resistant sealant, which is mainly manifested in tear strength, elongation at break, tensile strength, tensile strength is mainly used in stress-bearing places.

3. Structural adhesive is used for structural and non-structural assembly bonding of various curtain walls, while weather-resistant adhesive is mainly used for waterproof sealing of joints.

4. The modulus, hardness, strength and quality of the structural adhesive are higher than those of the same grade of weathering adhesive, but the elasticity of the weathering adhesive is higher than that of the structural adhesive.

Second, the use of silicone structural sealant and silicone weather-resistant sealant

Weather-resistant sealant.

1. It is suitable for weather-resistant sealing of various curtain walls, especially recommended for weather-resistant sealing of glass curtain walls, aluminum-plastic panel curtain walls, and stone dry hanging;

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

3. Sealing joints on the surface of concrete, cement, masonry, rock, marble, steel, wood, anodized aluminum and painted aluminum. In most cases, there is no need to use a primer.

Silicone structural adhesives.

1. It is mainly used for metal and glass structure or non-structural adhesive assembly 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 can meet the design requirements of the curtain wall of the fully hidden or semi-hidden frame.

3. Structural bonding and sealing of insulating glass.

Extended information: 1. Glass glue.

Glass glue is a commonly used adhesive in the family, the main ingredient is sodium silicate (Na2O·MSIo2), soluble in water, viscous, also known as water glass in the south, and bubble alkali in the north. It is a material that bonds and seals various types of glass with other substrates.

2. All-purpose glue.

The so-called all-purpose adhesive refers to a class of solvent-based adhesives commonly used in the building decoration and hardware maintenance industry. It is named because of its wide bonding range and ease of use. Generally, it can be used for the bonding of wood, aluminum-plastic panels, leather, artificial leather, plastics, rubber, metals and other soft and hard materials.

The main ingredient of all-purpose glue is neoprene, which generally uses benzene, toluene, and xylene as solvents, and is yellow liquid viscous.

3. Curing. UV curing: Here "UV" is the English abbreviation of ultraviolet light, and curing refers to the process of transforming a substance from a low molecule to a high molecule.

UV curing generally refers to the curing conditions or requirements of coatings (paints), adhesives (glues) or other potting sealants that need to be cured with ultraviolet light, which is different from heating curing, adhesive (curing agent) curing, natural curing, etc.

Sogou Encyclopedia - silicone weather-resistant sealant.

The main uses of neutral silicone weatherproof sealants are as follows:

1. Neutral silicone sealant is often used for the installation and sealing of glass doors and windows and interior decoration projects. Since the use environment is mostly indoors, it does not need to withstand the sun and rain, so the requirements for weather resistance are not high, and it is enough to have good adhesion and sealing.

2. Neutral silicone weather-resistant adhesive has excellent weather resistance. It is widely used in outdoor sealing projects such as glass curtain wall sealing, stone curtain wall waterproof sealing, aluminum veneer curtain wall waterproof sealing, etc. It has good displacement capacity, good elasticity and is not easy to crack.

It can still maintain stable performance and waterproof sealing in harsh environments.

3. Neutral silicone structural adhesive has excellent mechanical properties and high elasticity, and can withstand the weight of the adhesive material and the pressure from the outside. It is a high-grade silicone adhesive, which is often used to bond hidden frame glass curtain walls and stone curtain walls.

Notes:

Cannot be used as a structural sealant; Do not work on wet surfaces or submersion in water for a long time; Not suitable for use on all oily or exudate surfaces.

It should not be used in airtight construction sites; The surface temperature of the substrate is lower than 4 or more than 40, and it is not suitable for construction.

1. Special attention should be paid to maintaining a good ventilation environment in the sealant construction site. Late trouser chains.

2. If your eyes accidentally come into contact with the uncured adhesive, you should wash them with plenty of water and seek help from your doctor.

3. When purchasing products, please compare the cost performance of the products first.

4. Before using this product, the user must conduct the compatibility and adhesion test. Confirm that the product and substrate can meet the requirements of construction. The company only guarantees whether the product meets the quality, and is not responsible for any loss caused by any accident or improper use of the product during use.

The above content reference: Encyclopedia - neutral silicone weather-resistant adhesive.

According to ** to arrange: sealant is the cheapest, then weathering glue, and finally structural adhesive, sealant is used for doors and windows, the gap between glass and aluminum profiles, the gap between doors, windows and walls are all made of sealant, and the weathering glue is mainly used for curtain wall, the gap between the two curtain walls is mainly used for the connection between the steel structure of the glass curtain wall and the insulating glass, pure hand.

Sealants are used in a completely different way than structural adhesives. The most basic point is that structural adhesives are used in places where force is applied, and sealants cannot be used in places where forces are applied, but can only be used for sealing.

Silicone structural sealant is a neutral curing sealant specially designed for the bonding and assembly of glass structures in building curtain walls. It can be easily squeezed out in a wide range of air temperatures. Relies on moisture in the air to cure into a durable, high-modulus, high-elasticity silicone rubber.

The product does not require a primer for glass and can produce superior adhesion.

Silicone construction sealant is a neutral cure, high-quality silicone weather-resistant sealant for construction. Superior weather aging resistance, high and low temperature resistance -50 +150, good adhesion, it can be extruded and used in a wide range of climatic conditions, and quickly react with the moisture in the air to cure into a durable, high-performance and elastic silicone sealant, which can resist natural erosion such as oxygen odor, ultraviolet rays and rain. It is mainly used for caulking and sealing doors and windows and building decoration.

Sealant is a kind of viscose with sealing as the first purpose, and the types are: silicone sealant, polyurethane sealant, polysulfide sealant, acrylic sealant, anaerobic sealant, epoxy sealant, butyl sealant, neoprene sealant, PVC sealant, and asphalt sealant.

The name of glass glue is divided into broad and narrow senses, and the broad sense refers to all the adhesives that can be bonded with glass, all of which are called glass glue. Glass adhesive in the narrow sense refers to the adhesive that is colorless and transparent after curing and can be bonded to glass, mainly silicone.

Weather-resistant adhesives are divided into adhesives and sealants, which are affected by external conditions such as sunlight, temperature changes, wind and rain for a long time.

There will be no fading, discoloration, cracking, chalking and loss of strength and a series of aging phenomena. Ultraviolet radiation is a key factor.

1. Sealant is a kind of viscose with sealing as the primary purpose, silicone sealant is made of polydimethylsiloxane as the main raw material, supplemented by crosslinker, filler, plasticizer, coupling agent, catalyst mixed in vacuum paste form, at room temperature by curing with water in the air to form elastic silicone rubber.

2. Silicone glass glue is a kind of silicone product. Keto glass adhesives are divided into two types, one-component and two-component, which are mainly used for insulating glass sealing. The two-component silicone glass adhesive is a two-component sealant with room temperature vulcanized silicone rubber 107 and methyl silicone oil 201 as the main agent and metal oxide as the vulcanizing agent.

3. Weather-resistant adhesive is divided into adhesive and sealant, which is affected by external conditions such as sunlight, temperature changes, wind and rain for a long time, and will not appear a series of aging phenomena such as fading, discoloration, cracking, chalking and strength reduction. Ultraviolet radiation is a key factor.

The main component of silicone structural sealant is terminal hydroxyl polydimethylsiloxane, supplemented by crosslinker, filler, plasticizer, coupling agent, catalyst mixed in vacuum state to form a paste of elastic silicone rubber.

One-component silicone glass glue is a slag-like ointment that solidifies into a tough, rubber-like solid material once exposed to moisture in the air. Silicone glass adhesive has strong adhesion, high tensile strength, and at the same time has the characteristics of weather resistance, vibration resistance, moisture-proof, odor-resistant and adaptable to large changes in cold and heat.

The silicone glass glue is used under the bridge shed at zero degrees Celsius, so that the blocking will not be extruded, and the physical properties will not change.