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CarCareTruth

Polyalkylsiloxane with Functionalized Silica

  • Silicones
  • CAS trade-secret
  • IUPAC: Unknown (trade secret)

Polyalkylsiloxane with Functionalized Silica (CAS trade-secret) appears in 2 of the 2,122 car-care products CarCareTruth tracks (as of August 2026).

Trade-secret silicone-silica polymer system. No GHS hazard classification in available SDS data. Low systemic toxicity expected for organosiloxane polymers; no H-codes assigned at mixture level.

Polyalkylsiloxane with functionalized silica is the protection chemistry in Meguiar's M300 So1o All-In-One. The manufacturer lists it as a trade secret at 3–7% of the formula in SDS §3. This class of ingredient represents silicone polymers (polyalkylsiloxane) bonded to or combined with functionalized silica particles — the combination delivers hydrophobic water-beading behavior and durable adhesion to clear-coat surfaces.

Organosiloxane polymers are broadly used in personal care and industrial coating products. They bond to surfaces via the functionalized silica portion, leaving a water-repelling silicone polymer layer. No health H-codes are present for this ingredient in the SDS, and the product's mixture-level classification is not hazardous.

Trade-secret designation means CAS number and full chemical identity are withheld per manufacturer IP protection.

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
no
Biodegradable
no
Bioaccumulative
no
Persistent
yes
Ozone depleting
no
Microplastic
no
PFAS
no
Purpose: Silica-based protective polymer that delivers water-beading and durable paint protection in one-step polish products

Common questions about Polyalkylsiloxane with Functionalized Silica

What is Polyalkylsiloxane with Functionalized Silica used for in car care?
Silica-based protective polymer that delivers water-beading and durable paint protection in one-step polish products
Is Polyalkylsiloxane with Functionalized Silica a VOC?
No. Polyalkylsiloxane with Functionalized Silica is not classified as a volatile organic compound (VOC).
Is Polyalkylsiloxane with Functionalized Silica on California's Proposition 65 list?
No. Polyalkylsiloxane with Functionalized Silica is not on California's Proposition 65 list.

2 products contain this

Related

Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.