This food-grade liquid silicone rubber sealing gasket for coffee machines is produced by Xiangchu. It features stable sealing performance, temperature and aging resistance, no peculiar smell, meets food contact requirements, fits various household and commercial coffee machines, and supports custom specifications.
Material
Food-grade LSR
Hardness
Shore A 30-60
Temperature
Certifications
Applications
-40°C ~ +200°C
Colors
Black, White, Transparent, Customizable
# Food-grade LSR Coffee Machine Sealing Gasket
Food-grade Liquid Silicone Rubber (LSR) coffee machine sealing gaskets are critical performance components designed to prevent water, steam, and coffee leakage during brewing and heating operations. At 橡楚（湖北）橡胶有限公司, we manufacture precision-molded LSR gaskets engineered to meet the strict hygiene and durability requirements of commercial and residential coffee equipment, leveraging our years of specialized production experience in liquid silicone rubber products.
Unlike traditional rubber gaskets that degrade quickly from repeated heat exposure and food contact, our LSR sealing gaskets retain consistent elasticity and sealing performance across thousands of brewing cycles. The non-porous surface of LSR resists staining, bacterial growth, and coffee oil buildup, making it easy to clean and compatible with all standard coffee machine maintenance routines. All our raw materials are sourced from reputable suppliers that meet global food safety standards, ensuring our gaskets are suitable for continuous direct contact with hot food and beverages.
Our manufacturing facility is located at 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, where we maintain controlled production environments to produce gaskets with uniform dimensional accuracy and no residual harmful additives, suitable for integration into a wide range of drip coffee makers, espresso machines, capsule coffee systems, and commercial bulk brewing equipment.
Our food-grade LSR coffee machine sealing gaskets are produced from addition-cure liquid silicone rubber that meets the following core material requirements:
Our gaskets are produced via precision liquid injection molding, with the following controlled production and finishing specifications:
Coffee machines operate with consistent cycles of 90–100°C hot water and 120°C+ steam for espresso extraction and milk frothing. Our LSR material maintains stable elasticity and compression resistance far longer than alternative materials like nitrile rubber (NBR) or ethylene propylene diene monomer (EPDM). The low compression set of our gaskets prevents permanent deformation after prolonged compression, eliminating common issues like leaking from worn seals that require frequent replacement.
All our raw materials are tested for food contact compliance before production, and our finished gaskets undergo post-curing to remove any trace volatile compounds. Unlike lower-quality silicone gaskets that can leave an off aftertaste in coffee during the first uses, our product is completely flavor-neutral, so it will never alter the aroma or taste of brewed coffee, even at high brewing temperatures. The non-porous surface also prevents the growth of mold, bacteria, and yeast, supporting safe daily use in coffee equipment.
We use automated liquid injection molding for all our sealing gaskets, which delivers far more consistent dimensional accuracy than manual compression molding. This ensures a tight, custom fit for standard coffee machine models, eliminating the need for on-site trimming or adjustment during installation. Consistent dimensions also reduce installation stress on the gasket and surrounding equipment components, extending the service life of both the seal and the coffee machine.
The smooth, non-stick surface of LSR resists buildup of coffee oils, limescale, and coffee grounds, making it easy to wipe clean during regular machine maintenance. Our gaskets are compatible with all common coffee equipment cleaning methods, including hand washing with mild detergent, dishwasher cleaning, and soaking in food-safe descaling solutions, with no degradation or discoloration after repeated cleaning cycles.
Our food-grade LSR coffee machine sealing gaskets are suitable for a wide range of residential and commercial coffee equipment, including:
We also produce custom gaskets for specialized coffee machine designs, with support for small-batch production tailored to unique equipment dimensions and requirements.
The optimal hardness for your sealing gasket depends on its application:
We maintain stock of most standard industry sizes for common coffee machine models, with inner diameters ranging from 30 mm to 120 mm, and cross-sectional thickness ranging from 2 mm to 10 mm. For custom equipment or replacement gaskets for less common machine models, we can produce custom dimensions to match your drawing or sample requirements, with a minimum order quantity suitable for small and medium equipment manufacturers.
All our coffee machine sealing gaskets are produced using our base food-grade LSR material that meets global food safety standards. For applications that require additional high-temperature resistance for continuous steam exposure, we offer a modified high-heat food-grade LSR option that maintains performance in continuous 180°C service.
At 橡楚（湖北）橡胶有限公司, we operate our production processes in full compliance with ISO 9001 quality management system standards. Every batch of raw material is tested for food safety compliance and mechanical performance before entering production, and every finished batch of gaskets undergoes 100% visual inspection for surface defects, plus random dimensional testing and compression set testing to confirm compliance with our technical specifications.
We maintain full traceability for all production batches, from raw material sourcing to finished product shipment, to ensure consistent quality for every order. If you require a batch certificate of compliance or food safety testing documentation, we can provide this with every shipment.
For inquiries about standard stock sizes, custom gasket development, or bulk ordering, please contact us at:
