Custom Silicone Rubber Gaskets & Seals

Hongju is a leading manufacturer and wholesaler of high-quality rubber gaskets, seals, and custom silicone rubber products. We are committed to exceeding our customer’s expectations by providing them with high-performance gaskets and sealing products, competitive pricing for on-time delivery, and exceptional after-sales service.

We supply rubber gaskets and seals to various industries, including marine, automotive, engineering, defense, food, mining, and electrical.

Rubber Gaskets & Seals

Why Choose Hongju?

As a leading supplier of silicone rubber gaskets and seals, we always focus on quality and R&D and provide our customers with more value.


We can make gaskets for you, no matter the dimension or shape. Whether it be a standard part or something custom-made just give us an idea of what kind of material and thicknesses are needed along with your drawing so that our experts know how best to get started! With our decades of experience and expertise, we are confident that you will be satisfied with all aspects from start to finish.

Custom Silicone Rubber Gaskets & Seals We Made

Silicone rubber gasket has excellent non-stick and electrical insulation properties. It maintains its flexibility and compression set at low or high temperatures making it a popular option for sealant applications!

Silicone rubber gaskets offer excellent resistance to water, weathering, and oxidation. They’re approved for use with potable (drinkable) drinking water at temperatures up until +85°C, which is why they’re perfect in an environment where you want your plumbing system lasts as long as possible!

We also offer a range of durable silicone rubber gaskets that comply with the latest FDA food contact regulations. Alternatively, we can supply detectable metal gaskets to help reduce contamination risks in your products and make them safer for use.

We’re proud to offer our customers high-quality gaskets at competitive prices. We have the capabilities of manufacturing them utilizing state-of-the-art CNC machinery so that you can receive a custom-made product tailored specifically for your needs!

Silicone Rubber Gaskets & Seals

Gaskets & Seals Manufacturing Process

Below are the processes when we fabricate the gaskets and seals:


Gaskets & Seals Design

Before making the gaskets or seals, we must confirm if your design is ok. And we can assist you in making a design.


Making The Die-cut Mold

After the gaskets or seals design is confirmed, we will use CNC machine to make a die-cut mold.


Punching The Larger Sheet

After the mold is done, all the gaskets or seals will be made from silicone or rubber materials sheets.



Our QC team will check all the gaskets and seals to ensure they are of the required quality.



Usually all the gaskets and seals are packed with plastic bags, but we can also use other packaging if needed.



After the goods are packed, we will ship them by air or by the ocean as per your requirements.

Estimated Manufacturing and Shipping Time

Buying silicone rubber gaskets and seals wholesale from a Chinese maker is easy. Below is the time needed for your entire order process.

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Tooling Time

For CNC die-cut mold, it will take 3-5 workdays after the design is confirmed.

Manufacturing Time

Depending on different quantities, our manufacturing time for gaskets and seals will take 7-10 days.

Test and Packaging Time

Inspecting for products is critical. We spent 2-3 days on inspection and packaging cause we won't tolerate delivering faulty products to our customers.

Transit Time

For samples and small orders, you can ship by air. It will only need 3-5 days. And for bulk orders, shipping by sea will be the best choice. Shipping time will be 15-25 days.

Frequently Asked Questions

Below are some questions regarding custom-made silicone rubber gaskets and seals. If you have more questions, please feel free to contact us.

What is a silicone rubber gasket?

Silicone rubber gaskets provide superior performance in all types of applications. These high-quality materials can withstand extreme temperatures, perfect for any application where leak prevention is necessary!

Is silicone gasket better than rubber?

Silicone is superior to natural rubber in terms of resistance against hydrocarbon fuels and lubricants. For this reason, it’s often the go-to material for chemical seal applications that require protection from highly corrosive fluids such as those found outdoors or on machinery where rust will do no good!

What are the silicone gasket & seal applications?

Think of silicone rubber gaskets as the coating protecting your important parts from outside elements. Industries use these innovative materials for various applications, such as insulation and sealants in electrical or aerospace engineering; keyboards on office machines; surgical gloves, which must be highly biocompatible (meaning they won’t cause any harm if eaten).

Can i get a custom gasket sample before place the order?

Sure, we can offer samples for your evaluation and test, sample usually will take 3-7 days. And it will be charged because we have to make a sample tooling for them.

Get a Custom Gasket & Seal Quote for Your Projects Now!

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