Jason Tsangaris wrote:
The ingredients a

1. Methyltriacetoxysilane
2. Silica
3. Polydimethylsiloxane

Do these ingredients make up pure silicone?

Yes.

Methyltriacetoxysilane- is one of the main ingredients of silicone
sealent that gives off the vinegar smell.

Silica- is another raw ingredient

Polydimethylsiloxane- also known as PDMS is a silicon-based organic
polymer, and is particularly known for its flow properties. PDMS acts
like a viscous liquid, similar to honey. PDMS is also the primary
component in Silly Putty.

Carl