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Unsaturated Polyester Polymer

  • Polymers
  • CAS trade-secret
  • IUPAC: Polyester resin (trade secret formulation)

Unsaturated Polyester Polymer (CAS trade-secret) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).

In liquid putty formulations, unsaturated polyester polymers are present as part of the dissolved resin system; the health concerns are associated with the solvent carrier, not the polymer itself. Not GHS-classified as a health hazard. Not Prop 65–listed. The cured polymer film presents no significant health concern under normal use.

Unsaturated polyester polymer is a synthetic resin that forms the structural backbone of automotive spot putties and body fillers, including Bondo glazing putty. The polymer is dissolved in the aromatic solvent carrier (xylene, acetone, and co-solvents) and deposits a flexible, adhesive film as the solvents evaporate. The cured film is chemically stable and presents no significant health or environmental hazards. The specific formulation used in this product is identified as a trade secret in the SDS, meaning exact composition is not publicly disclosed, but the class is well-characterized and not associated with significant health concerns in cured coatings.

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
3/5
Purpose: Film-forming resin binder in automotive putties and body fillers; provides adhesion, flexibility, and structural integrity to the cured film

Common questions about Unsaturated Polyester Polymer

What is Unsaturated Polyester Polymer used for in car care?
Film-forming resin binder in automotive putties and body fillers; provides adhesion, flexibility, and structural integrity to the cured film
Is Unsaturated Polyester Polymer a VOC?
No. Unsaturated Polyester Polymer is not classified as a volatile organic compound (VOC).
Is Unsaturated Polyester Polymer on California's Proposition 65 list?
No. Unsaturated Polyester Polymer is not on California's Proposition 65 list.

1 product 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.