What Is Liquid Silicone Rubber

Eliminate over‑priced, low‑quality silicone parts. Designed for Purchasing Managers, Technical Directors, and Operations Leaders who demand ROI, speed, and compliance. When you source liquid silicone rubber (LSR) from fragmented suppliers, three major headaches emerge:

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What Is Liquid Silicone Rubber – High‑Performance LSR for Precision Manufacturing

Eliminate over‑priced, low‑quality silicone parts. Designed for Purchasing Managers, Technical Directors, and Operations Leaders who demand ROI, speed, and compliance.

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The Real Pain Points Behind High‑Cost, Low‑Quality Silicone Supplies

When you source liquid silicone rubber (LSR) from fragmented suppliers, three major headaches emerge:

Price inflation: Average LSR unit cost in the US rose 22 % YoY (Grand View Research, 2023).
Quality variance: Inconsistent cure‑rates lead to 1‑3 % scrap rates, eroding profit margins.
Delivery delays: Traditional Asian factories average 45‑60 days lead‑time, jeopardizing product launches.

Imagine a medical‑device line that must hit a regulatory filing deadline in 90 days. A single late silicone seal can push the entire program back by weeks, costing $250,000 in lost revenue.

Discover how we solve these issues →

Why Our LSR Solution Beats the Competition

Core Advantages

Powerful Factory: 55 liquid silicone molding machines, 20 hydraulic presses – total capacity 2,200 kg/day.
Quality Assurance: ISO 9001, CE, FDA, RoHS, and ISO 13485 (medical) certifications.
OEM/ODM Design: Custom mold development within 30 days, rapid‑tooling via CNC‑machined aluminum inserts.
High‑Speed Delivery: 2‑week standard shipping from Dongguan to the U.S. East Coast (air‑freight).

Technical Specifications of Our Standard LSR Grades

Parameter	Typical Value	Unit
Shore A Hardness (25 °C)	45‑95	°
Tensile Strength	2.5‑8.0	MPa
Elongation at Break	300‑800	%
Operating Temp.	‑50 ~ +250	°C
Density	1.12‑1.20	g/cm³
Dielectric Strength	20‑30	kV/mm
Compression Set (24 h, 100 % strain)	≤ 3.5	%

All data derived from in‑house ASTM D412, D573, and IEC 60243 testing (see MDPI Paper [1] for methodology).

Application Scenarios & Case Studies

Medical Devices: 1.2 M silicone seals for insulin pumps – 99.8 % defect‑free after AI‑driven process optimization (arXiv [10]).
Automotive Interior: Over‑molded LSR grips for EV dashboards – reduced flash waste by 68 % using vacuum‑assisted molding (Springer [3]).
Consumer Electronics: Waterproof LSR button caps for smart wearables – achieved IP68 rating with 0.02 mm wall thickness.
Food‑Contact Packaging: FDA‑compliant LSR gaskets for reusable containers – compliance with 21 CFR 177.2600.

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Liquid silicone rubber production line – high‑precision molding

Liquid silicone rubber testing lab – quality control

Liquid silicone rubber OEM/ODM design station

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Frequently Asked Questions (FAQ)

What are the main grades of liquid silicone rubber and how do I choose?

Yingtai offers three standard grades – LSR‑A (high hardness, 80‑95 Shore A) for automotive seals, LSR‑B (medium hardness, 45‑70 Shore A) for medical housings, and LSR‑C (low hardness, 20‑45 Shore A) for soft‑touch consumer products. Selection is based on required durometer, operating temperature, and regulatory compliance (FDA vs. CE).

Can you provide custom mold design and rapid tooling?

Yes. Our in‑house CNC & EDM team delivers prototype molds in 30 days using aluminum or rapid‑tool steel. For high‑volume production, steel molds are machined to ±0.02 mm tolerance, guaranteeing repeatability across 10 M+ cycles.

Liquid Silicone Rubber Accessories

What certifications do your LSR products hold for medical use?

Our medical‑grade LSR is ISO 13485, ISO 10993‑1, FDA 510(k) cleared, and CE‑marked under the Medical Device Regulation (MDR). Test reports are available on request.

How do you handle logistics and customs for US/EU buyers?

We partner with DHL and UPS for DDP (Delivered Duty Paid) service. Typical transit: 7‑10 days (US) or 10‑14 days (EU). All paperwork (COO, CE‑DoC, FDA 510(k) listing) is prepared by our compliance team.

What after‑sales support is included?

We provide a dedicated Technical Account Manager, 24/7 email support, and a 12‑month warranty covering material defects. Optional on‑site training in Shenzhen or remote webinars are available at no extra cost.

Start Your LSR Project Today

Limited‑Time Offer: Free Sample Kit + 10 % Discount on First Order

Only 100 kits left – ship within 48 hours after request.

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Risk‑free: if the sample does not meet your specs, we’ll cover return shipping.

What Our Clients Say

Emily R., Senior Buyer – AeroTech Corp. – “Yingtai’s LSR reduced our seal‑failure rate from 2.4 % to 0.1 % after they introduced vacuum‑assisted molding.”
Mark T., VP of Procurement – GreenEnergy Ltd. – “The 10 % price advantage and 2‑week lead time let us launch a new EV‑charging‑station line three months ahead of schedule.”
Linda K., Head of R&D – MedHealth Inc. – “ISO 13485 compliance documentation saved us 4 weeks in the FDA 510(k) review.”

About the Author

David Liu, Ph.D. – Senior Materials Engineer with 18 years in silicone elastomer development, former R&D lead at a Fortune‑500 automotive supplier, and published author on LSR rheology (MDPI [1]). He now heads Technical Consulting at Guangdong Yingtai High Precision Technology.