How to remove the potting glue on the circuit board?

In the use of electronic products always can not avoid the damage of components, some of the main components are also encapsulated in the circuit board. However, it is difficult to remove the potting glue on the circuit board, today we will discuss how to remove it together. There are different types of filling sealant, the most widely used organic silicone filling sealant, epoxy filling sealant, polyurethane filling sealant.

Among them, the epoxy sealant is very hard, hard to remove, acetone, alcohol, acetic acid, can not really clean the epoxy sealant, the epoxy sealant before it hardens, can be washed out with alcohol, if it hardens, alcohol can't get rid of it, unless it's destructive, like you don't want to use circuit boards anymore. Of course, the sealant has not solidified words can use a hair dryer heating, and then scrape down with tools such as scrapers, residual sealant can be dipped in a small amount of acetone with cotton cloth to wipe clean. There is a relatively soft after curing silicone pouring sealant, if you want to remove the cured silicone pouring sealant, just need to use a knife around a cut, and then take out the cured pouring sealant. This is quite convenient.