Prolonged curing time 

In some cases, the curing time of polyurethane potting glue may exceed expectations. This may be related to ambient temperature, humidity, glue quality, and mixing ratio. 

Solutions: 

To address the issue of prolonged curing time, users can adjust the temperature and humidity of the construction environment to accelerate the curing speed. At the same time, ensure the use of high-quality polyurethane potting glue purchased through regular channels, and strictly follow the product instructions for mixing and use. 

Bubbles after curing 

The selected product has poor defoaming properties; air is entrapped during the mixing process, and no vacuum defoaming is performed; before use, the product is not mixed evenly, resulting in excessive polyol after mixing, which will also produce bubbles. 

Solutions: 

To address the issue of bubbles after curing, users can choose products with good defoaming performance and vacuum them after mixing the main agent and curing agent. Preheating the product to be potted will help air escape. Cure in a room with lower temperature and humidity to allow sufficient time for air to escape. 

Poor adhesion to substrate 

If the polyurethane potting glue does not reach the expected strength or bonding effect after curing, it may be due to improper surface treatment of the substrate or incorrect mixing ratio. 

Solutions: 

To address the problem of poor adhesion, first ensure that the substrate surface is properly treated, such as sanding and cleaning. Second, strictly follow the mixing ratio in the product instructions to ensure that the glue performance is fully utilized.

Color change or yellowing 

Polyurethane materials will be affected by ultraviolet rays, light, ambient temperature, air humidity, and other environmental factors during the curing process, resulting in yellowing after curing. In addition, long-term use and improper maintenance will also accelerate the aging and yellowing of polyurethane materials. 

Solutions: 

To address the problem of color change or yellowing after polyurethane curing, choose a UV-resistant polyurethane adhesive to reduce the impact of light on color. UV Avoid exposure to direct sunlight or high temperatures during storage and use. Choose cool and dry storage conditions, and regularly clean, wipe, and maintain polyurethane products. 

Uneven surface after solidification 

Excessive humidity or low temperature in the construction environment can lead to incomplete solidification of polyurethane, resulting in an uneven surface. Inadequate construction techniques or improper operation can also lead to incomplete solidification of polyurethane, or the selection of poor-quality materials can also easily lead to an uneven surface. 

Solutions: 

Maintaining a suitable humidity and temperature in the construction environment can effectively prevent incomplete solidification of polyurethane. Paying attention to technical details during construction, operating according to requirements, and choosing high-quality materials can effectively prevent uneven surfaces. 

If the uneven surface of the solidified polyurethane is severe and cannot be resolved by sanding, it is recommended to consider re-construction.

Polyurethane potting glue As a high-quality sealing material, when used correctly, it can bring great convenience to users. For problems that may be encountered during use, as long as we adopt the correct solution strategy, we can ensure that the product performance is fully utilized. Hinnel Has a wide range of innovative polyurethane potting glue product series, with a variety of mechanical properties, including gel properties, elastomer properties, impact resistance, large size stability, and transparent, UV-resistant solutions for transparent applications. UV Able to quickly respond to adhesive needs, welcome users to consult and understand. 

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