Intermediate · 6 min read

Materials: Silicone vs TPE and Everything Else

Porosity, sterilisation, durometer and why 'body-safe' on a box means nothing on its own.

Sex toys are unregulated in most markets. "Body-safe", "medical grade" and "hypoallergenic" are marketing terms with no enforced definition. What actually matters is porosity and what the material is made from.

Non-porous materials

These can be fully sanitised, do not harbour bacteria, and are the only sensible choice for anal use.

  • Platinum-cure silicone. Flexible, warms to body temperature, durable for years. The standard.
  • Borosilicate glass. Rigid, non-reactive, excellent for temperature play, dishwasher safe.
  • Stainless steel. Heavy, rigid, sterilisable, very long-lived.
  • ABS plastic. Hard, non-porous, common in bullets and vibrator shells.

Porous materials

These have a microscopic open structure that traps fluid and bacteria and cannot be sterilised.

  • TPE and TPR. Soft, cheap, extremely common. Fine to know about; poor for anal use.
  • Jelly rubber and PVC. Often contain phthalate plasticisers. Frequently have a distinct chemical smell. Avoid.
  • "Realistic" blends. Marketing names for TPE variants in most cases.

If a porous toy is your only option, always use a condom on it and treat it as disposable.

Reading durometer

Shore A hardness describes firmness. Roughly:

  • 00–10A: very soft, floppy, hard to insert without a harness.
  • 10–20A: soft with a firm core. Comfortable and common for anal.
  • 30A and up: firm. Better for precise prostate pressure, less forgiving.

Dual-density toys pair a firm core with a soft outer layer and are generally the most comfortable option once you know what you like.

Practical buying rules

  • If the price seems impossibly low for the size, it is TPE.
  • If the box will not name the material, assume porous.
  • If it smells strongly out of the packaging, do not use it.
  • Buy from retailers who publish material specifications. Reputable ones always do.

This article is general education for adults, not medical advice. If you have a health condition, take medication that affects bleeding, or experience persistent pain or bleeding, speak with a clinician.

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