This is an 16oz bottle of Silicone Art Materials OSS silicone solvent (photo shows 8oz). SAM OSS is a clear liquid that works both as a solvent and thinner, which is an important part of any silicone painting set. This solvent evaporates 100% at room temperatures and is completely odorless. 

Use OSS the same as you would Novocs -- however it doesn't evaporate as quickly as Smooth-On's Novocs does, which makes it WONDERFUL for painting! OSS dries slightly slower than water.

While this solvent is flammable, it is NOT considered a shipping hazard and can safely ship worldwide. OSS Solvent does not contribute to ozone depletion or global warming. 

Painting Tip: Before painting your silicone, using a thin coat of OSS on the surface of your silicone as part of your painting prep will open up the pores of the silicone, which leads to a better paint bond. When used as a paint thinner, OSS evaporates into the air as well as soaking into the silicone, which helps draw silicone paint into the pores of the silicone doll for a more secure paint bond.