When you are specifying materials for an adult wellness product, two options dominate the B2B sourcing conversation: medical-grade silicone and ABS plastic. Both are widely available from Chinese manufacturers. Both have legitimate roles in product construction. But they serve fundamentally different functions — and confusing them is one of the most expensive mistakes a new brand can make.

This guide gives you a precise, citable breakdown of what each material is, where it belongs in a product, what certifications it requires, what it costs, and how to verify a supplier's material claims before you commit to a bulk order.

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What Is Medical-Grade Silicone?

Silicone is a synthetic polymer made from silicon, oxygen, carbon, and hydrogen. The term "medical-grade" refers to silicone that has been formulated and tested to meet biocompatibility and skin-safety standards set by regulatory bodies in the US and EU.

In practice, the two most relevant standards for adult wellness products are:

• FDA 21 CFR 177.2600 — the US Food and Drug Administration standard for rubber articles intended for repeated use, including food and body contact applications. Silicone meeting this standard is routinely described as "food-grade" or "FDA-grade" in supplier literature.
• ISO 10993 — the international standard for biological evaluation of medical devices. Silicone meeting ISO 10993 biocompatibility testing (cytotoxicity, sensitisation, irritation) is described as "medical-grade." This is a higher bar than FDA 21 CFR 177.2600 and is required for clinical-channel products.

For standard adult wellness retail — e-commerce, adult specialty retail, Amazon — FDA 21 CFR 177.2600 compliant silicone is the correct specification. ISO 10993 medical-grade adds cost without meaningful differentiation in this channel. The important point is that the silicone must be tested and certified, not simply labeled as "food-grade" or "body-safe" without supporting documentation.

Key Properties of Medical-Grade Silicone

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What Is ABS Plastic?

ABS (Acrylonitrile Butadiene Styrene) is a rigid thermoplastic widely used in consumer electronics, automotive interiors, and industrial components. It is one of the most common engineering plastics in Chinese manufacturing due to its low cost, precise mouldability, and excellent mechanical properties.

ABS is not body-safe for skin contact on sensitive areas. It is not phthalate-free by default (grade-dependent), not non-porous, and not recommended for direct intimate contact under EU or US product safety frameworks. However, ABS is an excellent material for internal product components where it never contacts the user's skin.

Key Properties of ABS Plastic

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Side-by-Side Material Comparison

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Where Each Material Belongs in a Product

The industry standard for premium adult wellness devices is a two-material construction: silicone on the outside, ABS inside. Understanding exactly which components use which material helps you write accurate product specifications and evaluate supplier quotes.

Medical-Grade Silicone Components

• Full outer sleeve or body: The primary silicone shell that the user holds and that contacts skin during use. This is the most visible and most important silicone component.
• Tip and insertion section: The distal end of insertable devices. Must be silicone with no seams or joints at skin-contact zones.
• Button pads and control panels: Silicone overmould on control buttons allows tactile feedback while maintaining a consistent soft exterior.
• O-rings and gaskets: Silicone O-rings provide the waterproof seal around charging ports and seams — part of the IPX waterproofing system.
• Charging port covers: Where a physical cover is used, it should be silicone to maintain the waterproof seal and the soft-touch exterior.

ABS Plastic Components

• Motor housing: The internal cavity that holds the motor in precise alignment. Requires rigid, dimensionally stable ABS to maintain correct vibration transfer geometry.
• Battery compartment: Structural housing for the lithium battery pack. Must be rigid and thermally stable.
• PCB carrier: The internal frame that holds the printed circuit board, charging contacts, and control electronics.
• Structural spine: The internal skeleton that gives the product its shape and mechanical strength, over which the silicone sleeve is moulded or fitted.
• Charging port surround (internal): The ABS structure around a magnetic or USB-C charging port. The silicone cover goes on top; the ABS provides the mechanical structure underneath.

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Cost Breakdown by Material and Component

Material costs are a significant part of unit economics for adult wellness products. The table below shows typical component-level material costs at 500-unit MOQ for a mid-range vibrator (EXW Dongguan, 2025 pricing).

The silicone components represent approximately 60–65% of total material cost by value, while constituting a smaller proportion of total product weight. This reflects the higher per-kilogram cost of certified silicone versus commodity ABS.

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Certification Requirements by Market

Both materials require documentation for CE marking and for major e-commerce platforms. The table below shows what document you need, for which component, in which market.

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Common Material Mistakes B2B Buyers Make

These are the most frequent material-related sourcing errors that result in compliance failures, customer returns, and platform listing removals.

1. Accepting "body-safe" or "non-toxic" Without Documentation

These marketing terms have no regulatory definition. A supplier can print "body-safe" on a product made entirely from ungraded ABS without any legal consequence. The only evidence that matters is a third-party lab test report from an accredited laboratory — SGS, Intertek, TÜV Rheinland, Bureau Veritas, or an equivalent CNAS-listed Chinese lab — showing the specific product model tested and the specific standard passed.

2. Assuming CE Marking Covers Material Safety

A CE Declaration of Conformity covers the product's electromagnetic compatibility (EMC), electrical safety (LVD), and relevant directive compliance. It does not independently certify that silicone materials meet FDA 21 CFR 177.2600 or EU food-contact standards. You need a separate material test report for silicone components.

3. Specifying ISO 10993 for Standard Retail Products

ISO 10993 medical-grade silicone is required for implantable and clinical devices. For adult wellness products sold through retail, e-commerce, or adult specialty channels, FDA 21 CFR 177.2600 compliant food-grade silicone fully satisfies regulatory requirements. Specifying ISO 10993 adds USD 0.30–0.80 per unit in material cost with no corresponding compliance benefit for this channel.

4. Not Verifying That ABS Is Used Only Internally

Some lower-cost suppliers use ABS for external surfaces, particularly on the lower half of a device below the primary skin-contact zone, to reduce the silicone sleeve length and unit cost. This produces a product with partial ABS exposure on the exterior — which fails EU REACH and FDA skin-contact standards. Always request a materials-by-component breakdown from your supplier before approving samples.

5. Accepting Silicone Mixed With PVC or TPE

Some suppliers quote "silicone" that is actually a TPE (thermoplastic elastomer) or a silicone-PVC blend. TPE and PVC blends are porous, may contain phthalate plasticisers, and do not meet the same safety profile as pure silicone. Request an SGS hardness and material verification test to confirm the outer sleeve is pure silicone, not a blend.

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How to Verify a Supplier's Material Claims

Use this verification sequence before approving any sample or placing a bulk order:

1. Request the MSDS for both the silicone and the ABS used in your product. The MSDS should identify the material grade, the chemical composition, and the originating material supplier (e.g., Wacker, Shin-Etsu, Momentive for silicone; LG Chem or BASF for ABS).
2. Cross-reference the silicone brand. Reputable silicone raw material suppliers include Wacker Chemie (Germany), Shin-Etsu (Japan), Momentive (US), and Dow Corning. Chinese-branded silicone raw materials vary widely in quality; ask for the raw material datasheet.
3. Request the third-party lab test report for the silicone outer components. This should show: the specific model tested, the lab name and accreditation number, the standard tested (FDA 21 CFR 177.2600 or equivalent), and a pass result.
4. Request a phthalate test report covering DEHP, DBP, BBP, DINP, DIDP, and DNOP — the six phthalates restricted under EU REACH Annex XVII and US CPSC regulations.
5. Verify the ABS is used only internally. Ask for a cross-section diagram or a physical cross-section of the sample showing which surfaces are silicone and which are ABS. On a premium product, no ABS should be visible or reachable during normal use.
6. Confirm silicone is not a TPE blend. Request an SGS hardness test and material identification test (FTIR analysis) if you have any uncertainty about the sleeve material.

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Material Selection Summary

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Conclusion

The silicone vs ABS decision is not actually a choice — it is a design principle. Every adult wellness product that meets current EU and US market standards uses both materials in the correct zones: silicone for all skin-contact surfaces, ABS for all internal structural and electronic components.

The risk is not in choosing the wrong material on purpose. The risk is in accepting supplier assurances without documentation, approving samples without verifying material composition, and assuming a CE mark covers material safety without requesting the supporting test reports.

Build your supplier verification process around documentation: MSDS for both materials, a third-party silicone material test report (SGS or equivalent), a phthalate test report, and a cross-section diagram confirming which surfaces are silicone and which are ABS. These four documents cost the supplier nothing to produce if they are already compliant — and their absence is the most reliable indicator that they are not.

Evokomoribi uses FDA 21 CFR 177.2600 compliant silicone on all external skin-contact components, with MSDS, SGS material test reports, and phthalate-free certification available to verified B2B buyers. Contact our team to request the full documentation package for any product in our catalogue.