Custom Silicone Sink Mat | US 2026 Project
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Product |
Square Silicone Sink Mat with Center Drainage Cutout |
|---|---|
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Order Quantity |
Initial Order: 15,000 pcs |
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Material |
Food-Grade Solid Silicone |
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Key Specs |
Hardness: Shore A50 Temperature Resistance: -40°C to 230°C |
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Certification |
FDA, LFGB, GB 4806.11 |
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Lead Time |
DFM Evaluation: 24 hrs |
Project details
A US-based kitchenware brand, specializing in kitchen safety products and sink accessories, wanted to develop a silicone sink mat with a central perforation to protect the sink surface and support kitchen utensils. The previous supplier’s sample met the client’s aesthetic requirements, but testing revealed three problems: the edges didn’t fit the sink bottom properly, the overly deep surface texture made cleaning difficult, and the central drain perforation was misaligned with the standard sink drain opening.
The client contacted Z.S.R, a company with extensive experience in silicone product manufacturing, through social media. Our engineering team provided a DFM (Design for Manufacturing) assessment and recommendations within 24 hours, highlighting the need for optimization of the corner, surface, and center cutouts.
Based on the DFM results, the project moved into mold making and sample production, followed by quality verification of the first batch before mass production.
Delivery data
Engineering DFM Assessment
Large Rounded Corner Design + Thickened Edges
Z.S.R changed the four right corners of the mat to large rounded corners (R6 mm), while maintaining the main body thickness at 3.2 mm and thickening the edges to 4.2 mm to form an edge-wrapping structure. A 0.3 mm deep stress-relieving groove is added to the inner side of the edge to disperse the cooling and shrinkage stress of the thin plate.
When a large-area thin silicone mat cools, the shrinkage rate between the center and the edges is inconsistent, and the release of residual stress can easily cause the corners to lift. A large 6 mm rounded corner combined with thickened edges forms a frame that improves the mat’s corner bending resistance; the stress release grooves provide a channel for releasing shrinkage stress, allowing the mat to fit smoothly against the bottom of the sink.
Raised Dot Array Anti-Slip Texture
The surface of the sink mat features a uniform raised dot array texture with a texture depth adjusted to 0.8 mm. The diameter of the raised dots is 3 mm, and the height is 0.8 mm. The cross-section has a semi-circular transition, and the spacing between dots is adjusted to 4 mm.
If the texture on the mat surface is too shallow (<0.5 mm), the coefficient of friction is insufficient, and items are prone to sliding; if the texture is too deep (>1.5 mm), it easily traps dirt and mold. The raised dot array provides a stable anti-slip effect, and the semi-circular cross-section of the raised dots eliminates dead corners, allowing water to flow smoothly along the gaps, making cleaning easy.
Reinforced Central Drainage Hole Structure
Engineers precisely positioned the dimensions of the sink drain outlet according to American standards, using mold positioning references to ensure a hole position deviation ≤0.5 mm. A 4 mm wide and 4.5 mm thick annular reinforcing rib is added around the central hollow hole, with a 1.5 mm rounded corner transition at the edge.
The holes are precisely positioned according to the standard drain outlet, and the mold positioning reference ensures a close fit; the stress is most concentrated at the center drain hole, and the annular reinforcing rib increases the hole edge thickness to 4.5 mm, while the 1.5 mm rounded corner eliminates stress concentration points at sharp corners.
Mold Making, Sample Production & Quality Verification
Mold Processing
Z.S.R Group is equipped with 10 advanced CNC machining centers and 4 EDM machines, capable of creating molds for silicone sink mats.
Silicone Molding
Production is supported by 48 solid molding machines, 12 liquid molding machines, and 13 injection molding machines utilizing a one-piece solid silicone molding process to produce silicone sink mats. Over 10 printing and spraying production lines also allow for printing logos or patterns on the silicone sink mats.
Secondary Vulcanization
After molding, the silicone sink mats undergo secondary vulcanization at 200°C for 2 hours.
The secondary curing process removes small-molecule volatiles from the silicone, reduces product odor, and ensures the mats meet food contact safety standards.
Quality Inspection
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Test |
Condition |
Acceptance Criteria |
Result |
|---|---|---|---|
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Folding Fatigue Test |
Repeatedly fold the mat 5,000 times |
No cracks or visible stress whitening |
Pass |
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Anti-Slip Friction Test |
Friction coefficient testing on dry and wet tabletops |
Coefficient of friction ≥ 0.45; kitchenware remains stable without slipping |
Pass |
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Thermal Cycling Test |
50 heating and cooling cycles between -40°C and 230°C |
No deformation, cracking, delamination, or oil exudation |
Pass |
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Flatness and Warpage Test |
Place on a flat, level surface at room temperature for 24 hours |
Corner lift height ≤ 1.5 mm |
Pass |
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Drainage Cutout Tear Resistance Test |
Repeatedly pull and rub the cutout edges 2,000 times |
No tearing or cracking around the cutout edges |
Pass |
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Dimensional Tolerance Inspection |
Measure overall dimensions and cutout position using a 2D optical measuring system |
Dimensional deviation within ±0.3 mm; cutout position deviation ≤ 0.5 mm |
Pass |
|
Food Contact Migration Test |
Tested in accordance with applicable FDA and LFGB requirements |
No unacceptable migration of harmful substances; meets applicable food-contact requirements |
Pass |
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Visual Inspection |
100% visual inspection of the mat surface |
No bubbles, incomplete filling, flash, or scratches; uniform surface texture |
Pass |
The production samples passed the specified folding fatigue, anti-slip friction, thermal cycling, flatness, cutout tear resistance, dimensional, food contact, and visual inspections. In particular, corner lift height stayed within 1.5 mm after 24-hour static placement.
Related Product
Customer reviews & feedback
“Thank you for your follow-up! We did receive the sink mats we ordered in July 2026. They work great on our sink. We currently have an order for silicone gloves planned, and we’ll contact Rachel later. Thank you for your products and services, we are very grateful!”
Custom Silicone Sink Mat
OEM & ODM solutions for brands, retailers, wholesalers, and Ecommerce sellers. Food-grade silicone sink mats with FDA/LFGB compliance.
Other Project
For industrial-scale production, ZSR Group also operates a dedicated silicone compression molding service for custom silicone parts.
