"Master, this glue turns yellow after only half a year of use! "When I went to repair the large screen in the mall last week, the customer pointed to the degummed LED module and jumped straight to the foot. Let’s talk about this today - where should I buy double-sided screen adhesive? How to choose not to step on the wrong side?

1. Comparison of common glue types on the market

1. Organic silicone (monthly consumption accounts for 65% of the market)

• ​​advantage​ ​: Temperature resistance -40℃~150℃
• ​​shortcoming​ ​: 24 hours of curing, slow construction
• Price: 80-120 yuan per piece (500ml package)

Last year, a gymnasium used the wrong glue, and 180,000 more screen repairs cost 200㎡. remember:​ ​Outdoor screens must be weather-resistant​​！

2. Polyurethane glue (emerging forces)

• ​​Highlights​ ​: 2 hours quick drying, saving 3 days of construction
• Pain point: 30% more expensive than silicone
• Tested data: UV resistance is increased by 2 times

3. Acrylic glue (use with caution! )

• Only suitable for temporary booths
• Crispy after 3 months of sun exposure
• A screen at a certain exhibition fell off and injured people, and compensated 260,000 yuan

2. Guide to prevent pits from purchasing channels

1. Three major traps of online procurement

• Selling dog meat with sheep's head (the page is written with imported glue and actually sent to domestically produced)
• Most of the products that are available for purchase are expiration products
• Parameter virtual mark (nominal temperature resistance 200℃ is measured at 120℃)

2. Offline physical store inspection skills

• Colloid with ultraviolet flashlight (high purity uniform light transmission)
• Smell the smell (pungent and absolutely unqualified)
• Test fluidity: It is best to have a 45-degree inclination without dripping

3. Identification of special channels

• Customs fined and confiscated glue to buy with caution (maybe expired)
• The remaining materials of the project need to be found in the original packaging
• ​​Recognize GB/T 7124 certification​ ​50% worry-free

3. Detailed dismantling of costs (taking the 100㎡ project as an example)

4. Construction process timetable (actual measurement comparison)

1. Base material treatment: 2 hours (This step must not be saved! )
2. Dispensing operation: 4 hours/100㎡ (the robotic arm is 3 times faster than manual)
3. Curing Wait: Silicone 24 hours vs Polyurethane 2 hours
4. Quality inspection and debugging: 72-hour aging test must be performed

Exclusive shopping tips

1. ​​Look at the bottom of the packaging bucket​ ​:Don't precipitate more than 1cm
2. ​​Need a test report​ ​: Focus on weather resistance and shear strength
3. ​​Sample measurement method​ ​: Apply to aluminum plate and exposed to the sun for 7 days to see the changes
4. ​​Calculate the comprehensive cost​ ​: Very expensive but saves later maintenance costs

Personal experience talk

After working in the project for more than ten years, I found a strange phenomenon: 60% of customers are stingy on glue, and the later maintenance fee is 5-8 times the price of glue. Last month, I just helped my customers change batches of imported glue, and the maintenance rate dropped by 73% during the three-year warranty period.

Now new​ ​Low temperature fast fixing glue​ ​It is really fragrant, and the construction will still be done at -10℃. The Northeast customer said it was OK after using it. If you ask me, choosing glue is like finding a partner - be more picky before marriage (strict testing), less trouble after marriage (long-lasting and durable)!

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