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Water purifier potting glue

Polyurethane potting compound GF-440


Water Purifier Potting Glue




1. Product introduction
GF-440 is a two-component polyurethane circuit board sealant. This product meets the national environmental protection requirements, with transparent appearance, good fluidity, good waterproof and insulating properties. This product is mainly applied in the protection of circuit boards, thereby playing a role in shock prevention and moisture prevention.


2. Product features
1.The cured product is transparent, with high transparency and excellent gloss.
2.The product is endowed with the benefits of automatic defoaming and leveling, remarkable surface finish, minimal water ripple, and a simple operation process.
3.The curing speed is fast, and it has excellent weather resistance and ultraviolet resistance after curing, and it keeps good performance at the temperature of (-40℃~120℃).


3. Technical parameters

Before curing





light yellow transparent liquid

light yellow transparent liquid

Viscosity (CPS 25℃)

less than 300

less than 150

Density (g/cm3)



Mixed viscosity (CPS 25℃)

less than 200

mass mixing ratio

A:B= 1:(0.98~ 1)

Operating time (100g min 25℃)


Surface dry time (min 25℃)


Surface dry time (min 70℃)


Full curing time (H 25°C)


after curing


unit or condition

cured product


visual inspection

light yellow transparent solid

Test items



Hardness Shore-A



Tensile strength (Mpa)






Surface insulation resistance (ohm)

≥6.0*10 13


Volume resistance (ohm-cm)

≥1.0*10 13

GB/T 1410-2006

Halogen content (PPM)




4. use and safety precautions
1. Weighing and mixing: This product is a two-component polyurethane glue, and the mixing ratio is calculated by weight. The accurate mixing ratio is very important (excessive component A will cause foaming at the bottom after curing, and excessive component B will cause foaming after curing. The surface layer is sticky or even not cured);
2. Stirring: When stirring, please stir slowly in the same direction to avoid a lot of air bubbles. Stir to ensure that A and B components are evenly mixed. Since component A is slightly turbid, there are still a lot of filaments with the naked eye when stirring, so it needs to be patiently stirred until it is completely transparent. If the mixing is uneven, it will cause stickiness and ripples on the rubber surface;
3. Blistering: The evenly stirred glue needs to be vacuumed and defoamed, or dripped with a machine; please do not use wooden sticks and other sticks with moisture to stir; 4
. Safety: Please try to prevent the skin from contacting with this product. If you accidentally touch it, please wash it with plenty of water or seek medical treatment;
5. Note: manual mixing will inevitably introduce air bubbles, and it needs to be vacuumed and degassed before dispensing. Due to the slow speed of manual dispensing, the requirements for environmental humidity are relatively high, and the relative humidity is preferably between 40 and 60. The base material should be dry, avoid using ink containing glycerin;
6. Pay attention to the preservation of unused glue after opening. The unused glue should be vacuumed or filled with dry nitrogen and sealed for storage. The reserved space in the container should not be too large to prevent the B glue from being turbid or the AB glue from absorbing moisture and causing the uncured or opaque glue block after curing. And the appearance of air bubbles in potting products.


5. Storage, transportation and precautions
1. Components A and B are put into airtight containers respectively, and stored separately in a dry, dark and cool place;
2. Such products are not dangerous goods and can be transported as general chemicals;
3. This product (especially component B) is easy to absorb water and deteriorate when placed in the air, so it should be kept sealed, and please seal it in time after use.


6. packaging and shelf life
1. Packing: A: 200Kg/drum or 20Kg/drum B: 200Kg/or 20Kg/drum can be packed according to customer requirements;
2. Shelf life: A: 3 months at room temperature B: 3 months.



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The company mainly produces and operates solder paste, solder bars, solder wire, anode plates (rods), anode balls and other related electronic welding materials.

The company mainly produces and operates polyurethane potting adhesives, sealants, and structural adhesives.

Hong Kong Chengxing Group Co., Ltd.


Add:The company mainly produces and operates polyurethane potting adhesives, sealants, and structural adhesives.

Gaoxin Tin Industry (Huizhou) Co., Ltd.


Add: Xianan Industrial Zone, Yuanzhou Town, Boluo County, Guangdong Province

Kunshan Chengli Solder Manufacturing Co., Ltd.


Add: No. 20-1 Zhuzhu Road, Lujia Town, Kunshan City, Jiangsu Province

Huizhou Chengli Industrial Co., Ltd.


Add: G/F, Block B, Heli Industrial Center, 3-5 Wang Tai Road, Kowloon Bay, Hong Kong

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