II. Methods to make up for the relatively long curing time
1.Adding catalysts or accelerators
Adding an appropriate amount of catalysts or accelerators to the adhesive formula can accelerate the curing reaction speed. For example, some amine accelerators can accelerate the reaction between epoxy groups and curing agents, enabling the adhesive to reach a relatively high strength in a shorter time. However, it should be noted that the amount of accelerators added should be appropriate. Excessive addition may lead to a too short pot life of the adhesive or affect other properties. Ultraviolet (UV) curing technology can also be applied to some room-temperature-curing epoxy adhesives. By adding photoinitiators, the adhesive can be cured rapidly under ultraviolet irradiation. This method can achieve curing within a few seconds to a few minutes, greatly improving the curing efficiency. It is especially suitable for some automated production lines or rapid repair scenarios with extremely high requirements for curing speed.
2.Pre-curing treament
When permitted by actual applications, the adhesive can be pre-cured. For example, after the adhesive is coated on the surface of the adherends, pre-curing can be carried out at a temperature slightly higher than room temperature (such as 40 - 60 °C) for a short period (several hours). In this way, the curing process can be accelerated, enabling the adhesive to reach a certain strength in advance, and then it can continue to be cured at room temperature until it is fully cured. However, attention should be paid to controlling the temperature and time of pre-curing to avoid performance degradation of the adhesive caused by over-curing.
 3.Optimizing the thickness and shape of the adhesive layer
Reducing the thickness of the adhesive layer can accelerate the curing speed. Because a thinner adhesive layer dissipates heat faster and the heat generated by the curing reaction can be dissipated more easily, which is conducive to the progress of the curing reaction. Meanwhile, reasonably designing the shape of the adhesive layer, such as adopting a narrow slit or dot bonding method, can also increase the ratio of the surface area to the volume of the adhesive layer, enabling the curing reaction to be completed more quickly.

III. Methods to make up for the relatively short service life
1.Adjusting the formula and packaging
The formula of the adhesive can be adjusted by adding some stabilizers or antioxidants, which can delay the chemical changes of the adhesive at room temperature and extend its service life. For example, adding hindered phenol antioxidants can inhibit the oxidation reaction of the adhesive during storage and maintain the stability of its performance. Small packaging or sub-packaging forms can be adopted. The adhesive can be divided into small packages. In this way, only one package is opened each time it is used, reducing the chance of the remaining adhesive contacting with air, thereby reducing the possibility of the adhesive losing its effectiveness due to oxidation and other chemical reactions.
 2.Optimizing storage conditions
Control the temperature and humidity of the storage environment. Store the adhesive in a cool and dry place, and try to keep the temperature at a relatively low and stable level, such as 5 - 15 °C. A lower temperature can slow down the chemical reaction speed of the adhesive and extend its service life. Meanwhile, avoid exposing the adhesive to a humid environment, because moisture may affect the performance and service life of the adhesive. Use containers with good sealing performance for storage. Ensure that the containers can effectively isolate air and water to prevent the adhesive from absorbing water or reacting with oxygen in the air during storage. For example, metal containers with rubber gaskets or high-quality plastic containers can be used for storage.