How to Prepare an RFQ for Custom Silicone Products: A Buyer’s Specification Checklist

TL;DR — An incomplete request for quotation (RFQ) produces prices that cannot be compared: factories may assume different materials, tooling, packaging, testing responsibilities, and production quantities. A useful custom silicone product RFQ defines the product’s function, drawing status, target market, food-contact or child-product requirements, customization, forecast volume, and approval process before asking for a unit price. Mitour Silicone operates a 4,500 m² Shenzhen facility, reports 21 years of manufacturing history and 300+ granted patents, and offers OEM and ODM development. Its published sourcing guidance lists typical starting MOQs of 1,000 pieces for stock-mold/logo programs, 2,000–3,000 for modified ODM projects, and 3,000–5,000 for fully custom structures; a specific existing bottle lists orders from 300 pieces. Published sample and production timelines are 7–12 and 25–35 working days respectively, subject to the project scope.

Key Takeaways

• A quotation is only comparable when every supplier prices the same product specification, quantity, packaging, testing scope, and delivery terms.

• “Food-grade” does not replace a market-specific compliance brief: intended contact conditions and applicable requirements must be identified.

• A patent portfolio or factory audit does not automatically qualify a new SKU: request the drawings, test reports, and production controls relevant to that product.

• An RFQ can start from a sketch, reference sample, or finished drawing, but each starting point requires a different development quotation.

• MOQ is SKU-specific: an existing-mold product may have a different starting quantity from a newly tooled OEM design.

• Ask for a milestone schedule, not one undifferentiated lead time: feasibility, tooling, samples, testing, approval, production, and shipping are separate stages.

Define the RFQ’s Starting Point: Existing Product, Modified Design, or New Tooling

The first line of a custom silicone RFQ should tell the factory what it is being asked to quote. Three requests that appear similar in an email may require substantially different engineering work:

For OEM, the buyer commonly supplies a developed specification or approved design. For ODM, the factory takes a larger role in turning a concept into a manufacturable product. The labels themselves are less important than the allocation of work: Who creates the CAD files? Who approves materials? Who pays for the mold? Who owns it? Who specifies and pays for third-party testing?

If a buyer wants only to customize an established product, include the exact page URL. For example, Mitour’s 550 ml collapsible silicone water bottle has a defined silicone-body and PP-cap configuration. A request to change its color and packaging is not necessarily equivalent to a request for a new bottle silhouette or sealing structure.

When the design is still conceptual, send the intended function, target retail market, approximate size, target cost, and reference images rather than asking for an unsupported “best price.” Mitour’s ODM service page describes an initial feasibility review within 24–48 hours after receiving a sufficient brief; its OEM service page explains the route for buyer-supplied designs.

Provide a Drawing Package That Can Be Manufactured and Inspected

A visual rendering communicates appearance. It does not, by itself, specify how a part should be molded or measured. An effective RFQ drawing package should identify the latest revision and, where available, include 2D dimensioned drawings, 3D CAD files, assembly views, and a bill of materials (BOM).

Dimensions, tolerances, and critical-to-quality features

Specify overall dimensions in mm, but give particular attention to features that control product performance. Depending on the item, these may include:

• Nominal and minimum wall thickness, especially at folds, seals, hinges, and handles.

• Mating dimensions for caps, valves, lids, plugs, and rigid inserts.

• Sealing-surface geometry and acceptable flash or parting-line location.

• Finished-product weight, if it affects cost or customer perception.

• Critical-to-quality (CTQ) tolerances rather than an unsupported blanket tolerance for the whole article.

• Logo position and maximum print area, including whether deformation during use could distort decoration.

State the measurement method when the geometry makes it relevant. A flexible silicone part can produce different readings depending on whether it is measured free-standing, held in a fixture, or assembled with a rigid component. If no tolerances have been engineered yet, label them “for supplier DFM recommendation” rather than presenting guessed figures as approved requirements.

For a collapsible water bottle, a drawing should separately identify the fold zones, bottle opening, cap interface, and any gasket or valve. For a food storage bag, the seal and corner geometry may deserve closer review than its overall outline. Mitour’s collapsible water-bottle range and self-sealing storage bag illustrate why a single overall dimension cannot describe the functional risk.

Color and appearance references

Provide a Pantone reference or an approved physical color sample, but recognize that a color printed on paper may not appear identical in a translucent or textured silicone compound. The RFQ should say whether the buyer expects:

1. A visual match under agreed lighting;

2. A physical master sample for production approval; or

3. An instrument-measured color tolerance, with the method agreed in advance.

Also specify the permitted appearance of mold lines, surface texture, logo registration, and any visible inclusions. Without an agreed reference, a supplier may quote a finish that technically meets the drawing but does not meet the brand’s retail expectation.

Mitour describes in-house tooling and structural development on its factory capabilities page. A buyer seeking that support should mark unresolved drawing items clearly so the engineering team can identify them during DFM rather than discovering them after a tool is cut.

Specify Silicone Material by Use and Performance, Not by Marketing Label

“Food-grade silicone,” “soft silicone,” and “premium material” do not give competing factories enough information to quote the same construction. The RFQ should state the intended use, then identify the material properties that matter to that use.

A practical material brief may include:

Do not copy a Shore A number, wall thickness, or maximum-use temperature from an unrelated product. A bib closure, foldable bottle body, and air-fryer liner solve different engineering problems. If the buyer does not yet know the correct material specification, the RFQ should ask the supplier to propose two or more technically justified options, with differences in function, testing scope, and cost made visible.

The same principle applies to proprietary formulations. Mitour’s ODM page references invention patents CN113650314A and CN114015239A for particular development areas. Include a patent or patented material in a quotation only if its claims and actual relevance to the proposed SKU have been confirmed. A patent number is not a replacement for a finished-product test report.

For products intended to contact food, see Mitour’s kitchen silicone category when identifying the nearest existing format. Specify the actual use conditions rather than requesting a generic “FDA/LFGB material” with no product context.

Identify the Target Market and Compliance Evidence Before Pricing

Testing can affect material selection, product design, sample count, cost, and schedule. A quote prepared before the buyer identifies the destination market may omit essential work.

For a food-contact RFQ, include the country or region of sale, food types, expected contact temperature, contact duration, and repeated-use conditions. Ask the factory to distinguish between:

• A factory management-system certificate;

• A raw-material declaration;

• A test report on a material or component; and

• A report or assessment applicable to the finished article.

For the United States, 21 CFR § 177.2600 may be relevant to certain repeated-use rubber articles, subject to the particular formulation and intended use. For the EU, Regulation (EC) No 1935/2004 sets the food-contact framework, while Regulation (EC) No 2023/2006 concerns good manufacturing practice. These references do not make every silicone product automatically compliant; the applicable assessment belongs to the specific article and use case.

A buyer of infant products should identify the exact product and market rather than assuming that “infant-grade” is a single global certification. A feeding bib, teether, and pacifier can face different product-specific requirements and hazards. Where relevant, the RFQ should ask a qualified compliance specialist or laboratory to confirm the applicable US or European child-product requirements before tooling approval. Mitour’s baby and infant product category shows the range of products that cannot reasonably be covered by one undifferentiated testing request.

Include a document request with the RFQ:

“Please identify the applicable requirements for the proposed product and sales market; state which existing reports cover the quoted formulation and components; list any new finished-article tests required; and itemize their cost and expected laboratory time.”

Mitour lists its company-level credentials on the certifications and patents page. The procurement decision should still be based on current documents with the correct scope, not solely on logos displayed on a website.

Define Branding, Packaging, and the Full Delivered SKU

An RFQ for “10,000 silicone units” is incomplete if one supplier quotes loose parts while another quotes printed retail cartons with barcodes. The buyer should describe the delivered SKU, including all components and packaging layers.

For branding, specify the artwork file format, color count, logo dimensions, placement, and expected durability. Ask whether the proposed method is molded-in embossing/debossing, printing, laser marking, or another process, and request a decorated sample before approval. If the logo is placed on a folding, stretching, or frequently washed area, request a product-specific durability recommendation.

For packaging, state:

• Individual bag, sleeve, box, hangtag, or bulk-pack format;

• Barcode, label language, and warning-text responsibilities;

• Units per inner and master carton;

• Carton-mark requirements and target shipping channel;

• Whether the supplier creates artwork, prints buyer-provided files, or only packs supplied materials;

• Whether an odor or material assessment is needed for packaging that contacts the silicone article.

Packaging is not a minor administrative detail for odor-sensitive silicone. Printed cartons, adhesive labels, fragrances, and warehouse conditions can affect the smell perceived when a customer opens the pack. The approval sample should therefore represent the product in its intended retail packaging, not just an unpacked silicone part.

Mitour’s OEM service page describes available customization across color, logo, structure, and packaging. Ask for each element as a separate line in the quote so later revisions do not become unexplained unit-price changes.

Request a Cost Breakdown, SKU-Specific MOQ, and Milestone Schedule

A useful quotation separates one-time costs, per-unit costs, and conditional costs. A single unit price conceals whether tooling, decoration, testing, packaging, and freight are included.

Commercial fields every supplier should return

Published Mitour figures demonstrate why MOQ must be tied to a specific project. Its 550 ml bottle product page lists a starting custom-order MOQ of 300 pieces. A separate Mitour OEM-versus-ODM sourcing article describes typical starting quantities of 1,000 pieces for stock-mold/logo work, 2,000–3,000 for modified ODM projects, and 3,000–5,000 for fully custom structures. Those figures describe different project types; the written quotation for the actual SKU controls.

The same article lists a typical 7–12 working-day sample lead time and 25–35 working days for mass production after approval. These are planning references, not a promise that tooling, laboratory testing, revisions, shipping, and customs are included.

Ask every supplier to return dates or working-day durations for:

1. RFQ clarification and DFM review;

2. Drawing and material confirmation;

3. Tooling or mold modification;

4. First-off samples and revisions;

5. Third-party testing, if required;

6. Signed sample approval;

7. Production, inspection, and shipment readiness.

Mitour’s contact page states that its team responds within 24 hours. The first response should clarify project scope; it should not be confused with a guaranteed final engineered quotation when drawings or compliance requirements remain unresolved.

Lock the Approved Sample and Define What Happens When Something Changes

A good RFQ anticipates the question that comes after the first acceptable sample: how will the manufacturer keep mass production equivalent to what the buyer approved?

Ask the supplier to describe its approval and change-control process. The purchase agreement or production specification should identify:

• The signed physical reference sample and its revision.

• Approved drawings, BOM, material grade, pigment, and decoration method.

• The inspection criteria for dimensions, appearance, function, and packaging.

• Lot-number traceability for materials and finished goods.

• Who can authorize a supplier, tooling, formulation, or packaging change.

• Which changes trigger new samples or compliance review.

• How nonconforming product is isolated, reported, and dispositioned.

Consider an illustrative procurement failure scenario: the approved sample uses one pigment system, but a later production order changes color and the substitution is not evaluated against the original food-contact evidence. Even if the new part looks correct, its supporting documents may no longer describe the produced formulation. The prevention is a formulation-lock and written-change-approval process, not a more persuasive product description.

A second common failure is quoting one design and sampling another. If a factory changes wall thickness to improve mold release, the adjustment may also affect folding feel, material usage, and price. The revised drawing should be approved before the buyer signs the sample.

Mitour describes incoming, in-process, final, and pre-shipment checks on its quality-control page. Include the records needed for your own SKU in the RFQ; do not assume that “QC included” tells the supplier which dimensions or functional tests your brand considers critical.

Buyer’s Checklist: 10 Questions to Send With the RFQ

1. Are you quoting an existing mold, a modified mold, or completely new tooling for this exact design?

2. Which drawing revision, dimensions in mm, and critical tolerances form the basis of your price?

3. What silicone compound, target Shore A hardness, pigment, and other component materials are included?

4. Which target-market requirements have you considered, and which SKU-specific reports are already available?

5. What testing remains necessary, who pays for it, and how many working days should we allow?

6. What are the MOQ and unit prices for each proposed quantity, color, logo, and packaging option?

7. Who owns the mold, and what are the terms for storage, maintenance, modification, and transfer?

8. What does the quoted sample include, and how will the approved sample be linked to mass production?

9. Which material or process changes require our written approval and possible retesting?

10. What are the separate milestones for tooling, sampling, approval, production, inspection, and shipment readiness?

Common Mistakes When Requesting Silicone Product Quotes

1. Mistake: Asking for “best price” using only a product photo. A photo does not define dimensions, materials, components, or packaging. Better approach: provide a use-case brief and identify every unknown that requires supplier recommendation.

2. Mistake: Comparing unit prices without comparing tooling. One supplier may include a mold; another may charge separately or quote an existing shape. Better approach: compare total project cost and document mold ownership.

3. Mistake: Treating “food-grade” as a complete compliance specification. It does not identify the destination market or contact conditions. Better approach: state the product’s actual use and request applicable, SKU-relevant evidence.

4. Mistake: Assuming a published MOQ applies to every product. An existing 550 ml bottle and a new structural design are different commercial projects. Better approach: obtain an MOQ for the exact design and configuration.

5. Mistake: Leaving retail packaging until after sample approval. Packaging can affect cost, shipping, labeling, and perceived odor. Better approach: include it in the first RFQ and approve a packed sample where relevant.

6. Mistake: Approving a sample without controlling changes. A later pigment, mold, or material substitution can invalidate the basis of approval. Better approach: sign a reference sample and require written change notification.

Conclusion: Send a Brief Suppliers Can Quote Against the Same Scope

A strong custom silicone RFQ is not necessarily long; it is specific about the decisions that affect cost, compliance, function, and delivery. Define the product route, drawings, material and market requirements, branding, packaging, target quantities, and approval method before comparing prices. Where specifications are not yet known, ask suppliers to identify assumptions and propose alternatives rather than silently choosing them.

To request an OEM or ODM assessment from Mitour, send the product drawing or concept, target sales market, intended use, annual forecast, and required launch date through the inquiry form. Mitour states a 24-hour response target; a project-specific feasibility review and final quotation depend on the completeness of the brief.

Related Mitour resources

• OEM silicone manufacturing

• ODM product development

• Factory capabilities and tooling

• Quality-control process

• Certifications and patents

• Collapsible silicone water bottles

• Kitchen silicone products

• Contact Mitour Silicone

Author: Peter Cui | Mitour Silicone (Shenzhen Yuanfeng Xingye Technology Co., Ltd.) | Company manufacturing history: 21 years | Shenzhen factory: 4,500 m² | Company-reported 300+ patents | View the scope of published certifications and supplier credentials | Email: yfxy@mymitour.com | WhatsApp: +86 136 0305 6950

FAQ

What is an RFQ for a custom silicone product?

An RFQ, or request for quotation, is the set of product and commercial information a buyer gives manufacturers so they can price the same project. For a silicone item, it should identify the drawing or concept, dimensions in mm, target material or Shore A hardness if known, component list, destination market, customization, packaging, quantities, and required delivery date. It should also ask suppliers to itemize tooling, samples, testing, unit prices, and MOQ. If important engineering decisions remain open, label them clearly. A supplier can then return a quotation with explicit assumptions instead of pricing an unspecified interpretation of a product photo.

Can Mitour quote a project without a finished CAD drawing?

Yes, the appropriate starting point depends on the development route. Mitour’s ODM service describes a feasibility review for buyers who have a concept, sketch, or reference rather than completed production drawings; the page states a 24–48-hour initial review after receiving the brief. To make that review useful, provide the product’s function, approximate dimensions, target market, target quantity, intended selling price if available, and images of comparable products. If the buyer already owns a finished drawing or approved sample, Mitour’s OEM route is the more direct quotation path. Engineering, tooling, and testing costs still require a project-specific quote.

What is the MOQ for OEM or ODM silicone products?

Mitour’s publicly stated MOQ varies with the project. One existing 550 ml water bottle lists custom orders from 300 pieces. Its OEM-versus-ODM guide gives typical starting points of 1,000 pieces for stock-mold/logo projects, 2,000–3,000 for modified ODM work, and 3,000–5,000 for full custom structures. These are not contradictory factory-wide promises; they reflect different tooling and production conditions. Color count, material, decoration, packaging, and whether existing tooling can be used may change the final MOQ. Ask for the quantity stated on the quotation for the exact SKU.

Does an ISO 9001 certificate prove that a silicone product is food-contact compliant?

No. ISO 9001:2015 addresses a quality management system; it is not a finished-product food-contact approval. An RFQ for a food-contact item should identify the sales market and use conditions so the supplier can determine which material and finished-article evidence is relevant. For example, 21 CFR § 177.2600 may be relevant to certain repeated-use rubber articles in the United States, while Regulation (EC) No 1935/2004 establishes an EU food-contact framework. Ask for current documents that identify the tested material or SKU, test conditions, laboratory, and report date. Factory-system credentials and product-specific test reports serve different procurement purposes.

How long does custom silicone product development take?

There is no single timeline covering every concept and tooling route. Mitour’s published sourcing guidance states a typical 7–12 working days for samples and 25–35 working days for mass production after approval; its ODM page describes an initial feasibility review within 24–48 hours after receipt of a sufficient brief. These ranges should not be added together mechanically: new mold construction, sample revisions, external laboratory testing, retail-packaging approval, and freight arrangements can change the critical path. Request a milestone schedule showing when drawings are frozen, first samples arrive, testing finishes, the signed sample is approved, and production is ready for inspection.

What files should be included in a silicone manufacturing RFQ?

Send the latest available 2D drawing, 3D CAD file, assembly view, BOM, artwork, and packaging layout, clearly marked with revision numbers. If some files do not exist, provide a dimensioned sketch, physical sample, or reference-product link and identify which decisions need engineering support. The brief should specify overall dimensions and critical mating features in mm, target quantity, color reference, logo location, and target market. For a multi-component product such as a bottle, list the silicone body, cap, valve, gasket, and any other materials separately. State which files are for reference only and which represent approved requirements; that distinction prevents a visual concept from being mistaken for a controlled production drawing.

Who owns the mold in a custom silicone OEM/ODM project?

Mold ownership is a contract term, not something the words OEM or ODM determine automatically. Before paying a tooling charge, ask the supplier to state in writing who owns the mold, whether the price covers the complete tool, where it is stored, who pays for maintenance or repairs, whether it can produce goods for another customer, and how transfer would work if the relationship ends. Record the mold identification, cavity count, approved drawing revision, and any buyer-owned design files. If an existing supplier-owned mold is being customized, its ownership position may differ from a newly commissioned exclusive mold. Resolve these points before approving tooling—not after the first production order.

How can buyers make quotations from two silicone factories comparable?

Send both factories the same controlled RFQ revision and require responses in the same commercial format. Each supplier should quote the same material assumptions, dimensions, finish, logo method, packaging, target quantities, testing responsibilities, and named trade term. Request tooling charges and unit prices in USD as separate lines, plus MOQ, sample charges, revision costs, and lead-time milestones. If a supplier proposes a different construction to reduce cost, ask it to label the response as an alternative quotation, not a direct equivalent. This makes the engineering trade-off visible and prevents a lower price from winning simply because an essential component, compliance test, or packaging operation was omitted.