It is a kind of building sealing material can withstand the joint outward shift has achieved the purpose of airtight, watertight and embedded in the building joint of the material.
It is an elastic sealant embedded in the joint after the obvious elasticity, when the joint outward shift, the residual stress caused in the sealant is almost proportional to the sealant should become.
It is a plastic sealant in the embedded joint after the obvious plastic, when the joint outward shift, in the sealant caused by the residual stress quickly disappeared in the sealant.
Silicone sealant has the ability to withstand a certain amount of pressure, and solar, temperature, wind and rain and other climatic conditions.
As for the toxic question, the jury is still out, but the international body of research is working hard to prove that it is harmful to certain functions.