Doors and windows
Doors and windows
Silicone sealant is a commonly used material in the installation and sealing of doors and windows. With its excellent weather resistance, sealing, adhesion, and elasticity, it plays a key role in door and window engineering. The following provides a detailed introduction to its application in the field of doors and windows, including application scenarios, advantages, type selection, and construction precautions:
1、 Core application scenarios
Sealing of glass and door and window frames
It is the main sealing material between glass and aluminum alloy, plastic steel and other frames, which can effectively prevent rainwater and air infiltration, and buffer the expansion and contraction differences between glass and frames caused by temperature changes, avoiding glass breakage or sealing failure.
For example, silicone sealant is required to form an elastic sealing layer at the edges of sliding window glass and the junction between casement window glass and the frame.
Gap filling between door and window frames and walls
After the installation of doors and windows, there will be gaps between the frame and the wall. Silicone sealant can fill these gaps to prevent rainwater from seeping into the room through the gap between the wall and the frame, while reducing outdoor noise and dust from entering, and improving the sound insulation and thermal insulation performance of doors and windows.
Especially in high-rise buildings or rainy areas, this stage requires higher weather resistance and bonding strength of the sealant.
Splicing and sealing of door and window components
For the joints of door and window frames (such as profile corners and joints), silicone sealant can seal the gaps between profiles, enhance the overall sealing and structural stability of the frame, and prevent profiles from rusting (metal frames) or deforming (plastic steel frames) due to water ingress into the gaps.
Sealing requirements for special function doors and windows
For fire-resistant doors and windows, fire-resistant silicone sealant should be used to maintain sealing performance at high temperatures and delay the spread of fire;
Curtain wall doors and windows require high modulus silicone sealant to withstand greater structural displacement and loads.
2、 The advantages of silicone sealant in door and window applications
Excellent weather resistance
It can resist UV rays, high and low temperatures (-50 ℃ to 150 ℃), wind and rain erosion, and is not easy to age, crack or lose elasticity after long-term use. It is suitable for long-term sealing of outdoor doors and windows.
Strong adhesion
It has good adhesion to commonly used materials such as glass, aluminum alloy, plastic steel, and stone for doors and windows, and can achieve firm bonding without the need for additional primer, reducing construction steps.
Elasticity and displacement capability
Has a certain degree of elasticity (displacement capacity can reach ± 25%), can adapt to the deformation of doors and windows caused by temperature changes, wind pressure, etc., and avoid cracking of the sealing layer.
Water resistance and sealing performance
The adhesive layer formed after curing is non absorbent and non permeable, and can maintain water and air tightness for a long time, which is the core guarantee for waterproofing doors and windows.
3、 Common types and selection criteria
According to the type and usage scenario of doors and windows, silicone sealant can be divided into the following categories, and the selection should be based on specific needs:
类型 | 特点 | 适用场景 |
中性硅酮密封胶 | 无腐蚀性，固化后释放醇类物质 | 玻璃、塑钢、铝合金等多数门窗材料 |
酸性硅酮密封胶 | 粘结力强，但有腐蚀性（释放醋酸） | 仅适用于玻璃与陶瓷等非多孔材料，不适用于金属、塑钢（可能腐蚀型材） |
高性能硅酮结构胶 | 强度高、位移能力大 | 幕墙门窗、大型玻璃板块的结构粘结密封 |
防火硅酮密封胶 | 耐高温、阻燃 | 防火门窗、有防火要求的缝隙密封 |
Selection principle:
Neutral silicone sealant is preferred for ordinary doors and windows to avoid corrosion of profiles;
Curtain walls or load-bearing structures require structural silicone sealant (certified by the state);
In humid environments (such as bathroom doors and windows), anti mold silicone sealant can be used to prevent mold growth.
4、 Construction precautions
Surface Treatment
Before construction, it is necessary to clean the dust, oil stains, and moisture on the door and window frames, glass, or wall surfaces to ensure that the surfaces are dry and clean. If necessary, sandpaper should be used to polish the metal surfaces to enhance adhesion.
Glue application technique
When applying glue, it should be continuous and uniform to avoid bubbles or broken glue. The recommended thickness of the glue layer is 3-5mm (too thin may cause cracking, while too thick may affect elasticity);
You can use masking paper to stick it on both sides of the adhesive seam. After gluing, use a tool to scrape it flat, and then tear off the masking paper to ensure a beautiful adhesive seam.
Curing conditions
Silicone sealant needs to be cured in a ventilated environment, and the curing time is affected by temperature and humidity (usually dry within 24 hours and fully cured within 7 days). Before curing, avoid rainwater erosion or external contact.
Compatibility testing
For special materials such as coated glass and new plastic steel profiles, a bonding test must be conducted before construction to ensure compatibility between the sealant and the material and avoid delamination.
5、 Summary
Silicone sealant is the "soul material" of door and window sealing systems, and its performance directly affects the waterproofing, sound insulation, thermal insulation effect, and service life of doors and windows. In practical applications, it is necessary to select suitable sealant according to the type of doors and windows and the usage environment, and strictly follow the construction specifications to ensure the long-term stability of the sealing effect.
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The brand accumulation of Xinzhan for 20 years has accompanied and witnessed the emergence, growth, and development of China's organic silicone construction adhesive, creating a reputation in the industry with "a generation of pride, a new exhibition in China; craftsmanship and quality, a new exhibition in the world".
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