Endurance Building Systems is the only company in the US that produces non plasticizing caulk. Traditional, retail-bought, caulk tends to shrink, and eventually crack, because the plasticizers that keep the product soft migrate out. With the EBS system the plasticizers do not migrate out, meaning the caulk performs better for a longer period of time. EBS caulk does not allow solvents to leak out either, so when a surface is coated you will not see staining or bleed-through where the caulk was originally applied.