Now more and more people like to make some handmade or food molds by themselves. Many will choose food grade liquid mold silica gel to make them because they are simple to operate and do not need any equipment; However, we often encounter some customers' feedback on why the surface of the mold made of food grade liquid mold silica gel is sticky. The main reasons are as follows:

The curing temperature of food silica gel is too low.

The AB component of food silica gel was not mixed in strict accordance with the specified proportion

The mixing process is not complete

The mixing container is not clean or the mixing tool is not clean

The surface of the original mold seed is not treated (especially if the original mold seed contains heavy metal elements or nitrogen, sulfur, phosphorus, tin, arsenic, mercury, lead, etc.)

The material of the original mold is polyurethane resin.

Solving these problems is relatively simple:

It can increase the curing temperature of food grade silica gel. In addition, increasing the curing temperature has the advantage of shortening the curing time

In the mixing process, the mixing shall be carried out in strict accordance with the mixing proportion provided by the manufacturer. For example, the common mixing proportion of Xubai silica gel food grade silica gel is 1:1 and 10:1

When mixing food grade silica gel AB components, be sure to use clean containers and mixing tools.

If conditions permit, it is best to spray a layer or even multiple layers of release agent on the surface of the mold seed. The release agent can effectively block the contact between silica gel and some chemicals in the mold seed that cause the non curing of silica gel and silica gel.