Possible Clues:

• Synthetic resin
• Implant material
• Polymer used in paints and implants, say
• Kind of rubber
• It's used in, say, synthetic rubber
• Stupid shape said to be due to its implant?
• Type of rubber
• Ridiculous-sounding figure resistant to chemical attack
• What's used in breast implants since oil is unstable
• Daft-sounding shape for boob enhancement