Polybutene

Polymers
CAS 9003-29-6
IUPAC: Polyisobutylene

Inert synthetic polymer. No health hazards. Used in chewing gum and food-grade lubricants.

Polybutene is the synthetic rubber/polymer that forms the matrix of detailing clay bars. It's tacky enough to grab embedded contaminants (iron particles, tree sap, overspray) from paint surfaces but soft enough to glide with proper lubrication. Completely non-toxic — the same polymer family is used in chewing gum base and food-grade machinery lubricants. No chemical hazard, no inhalation concern, no skin irritation.

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
Env. score: 4/5

Purpose: Clay bar matrix (contaminant capture medium)

1 product contain this

Mothers California Gold Clay Bar System
clay-bar

Health summaries are editorial — we synthesize from SDSs, peer-reviewed sources, and regulatory listings. Not medical advice.