The removal method of sealant varies depending on the type and curing state of the sealant. Here are some common methods for removing sealant:

1、 Mechanical Law

• principleRemove the sealant by impact or tapping, and use physical force to separate the sealant from the substrate.
• Applicable situationSuitable for most types of potting adhesives, especially those that are not fully cured or have lower hardness after curing.
• Operation stepsUse a hammer, chisel, or specialized adhesive remover to impact or tap the sealant until it becomes loose and falls off.

2、 Jiawen method

• principleHeat the sealant to its maximum tolerance temperature or higher, causing it to soften or carbonize, thereby losing its adhesive strength.
• Applicable situationSuitable for thermosetting sealant, such as epoxy resin sealant, polyurethane sealant, etc.
• Operation steps：
  1. Determine the maximum temperature tolerance of the sealant.
  2. Use a hot air gun, hot plate, or other heating device to heat the potting adhesive.
  3. After heating to a certain temperature, the sealant will soften or carbonize, and it can be peeled off with tools.

3、 Dissolution method

• principleChoose an appropriate solvent to dissolve the sealing adhesive and make it lose its adhesion.
• Applicable situationSuitable for certain specific types of potting adhesives, such as silicone potting adhesives, polyurethane potting adhesives, etc.
• Operation steps：
  1. Choose the appropriate solvent based on the type of sealant.
  2. Apply the solvent onto the surface of the sealant, or use the soaking method to completely immerse the sealant in the solvent.
  3. After waiting for a period of time, the sealant will be dissolved or softened by the solvent, and it can be removed using tools.

4、 Other methods

• SgraffitoFor the hardened sealant after curing, special tools or blades can be used to scrape it off. Be careful when scraping to avoid damaging the substrate.
• Chemical corrosion methodIn some special cases, chemical corrosion agents can be used to corrode the sealant, but this method may cause damage to the substrate, so caution should be exercised when using it.

matters needing attention

1. Before removing the sealant, it is necessary to first understand the type and characteristics of the sealant in order to choose a suitable removal method.
2. Be careful during the dismantling process to avoid damaging the substrate.
3. If the sealant contains harmful substances, it should be operated in a well ventilated environment and appropriate protective equipment should be worn.
4. The removed sealant and waste should be disposed of in accordance with relevant regulations to avoid environmental pollution.

In summary, there are various methods for removing sealant, and the specific method should be selected based on the type and curing state of the sealant. During the demolition process, attention should be paid to safety and environmental protection to ensure smooth operation.