Xiamen Better Silicone Rubber Co., Ltd

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Xiamen Better Silicone Rubber Co,.Ltd
Contact person:
Candice Wu
Email: sales@better-silicone.com


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Neoprene Bellows

Our company make compression molded tooling, design and manufacture different kinds & construction of elastomeric silicone rubber bellows & cover, expansion joint & flexible boots, bellows suction cup, air bellows etc, which as a protective appliance to dust proof, anti-oil, water proof and other environment elements in aim to keep equipment performance in medical device, machine automotive, pumping, industrial usage etc.
  • ERB-1

  • Better

  • 3924100000


Neoprene Bellows

Neoprene  Bellows, also known as, CR bellows, neoprene dust cover and neoprene expansion joints, are designed as a cover or expansion bellows which have versatile functions as silicone “dust boots” or seals, elastomeric expansion joint, used to seal out dust and other light-duty environmental factors while allowing a specific stroke or predetermined range of motion. They are quite common in industrial and automotive applications.

Neoprene Bellows are usually produced by silicone rubber compression molding, extrusion moulding or rubber injection moulding.  

As for the Rubber Bellows, we have some types can be sold to you directly like our attached file shows, please check for details:

Stock Rubber Bellows.pdf

molded rubber bellows.jpg

Reasons of Rubber Bellows' major defects:

1. Flashing is too big: to solve this problem, we need to pay attention to 3 points when production; the first one is mold-design, second one is workers' skill about removing flash, and the production technology is also very important, if molding pressure is not enough, will also make the flash hard to be removed. 

2. Mold misalignment & uneven wall: this problem mainly caused by mold tool, like mold-making precision, misalignment of upper mold and down mold, datum angle & the 4 located pins are not accurate enough.

3. Lip cracking: the situation is relative to raw materials hardness & durometer, products' structure, and die-cutting tool.

silicone bellows bellows expansion joint

Rubber Bellows Main Material

Temperature Range
Aging Weathering, Ozone
Anti-Oil & Grease
Anti Water Swell
Economy of Material
Material Notes

Chloroprene & Neoprene


-40F to 250F

Excellent Good Exprosure to refrigerants, can be compounded for FDA applications
-22F to 212F Poor
Excellent Good
Good Excellent Excellent resistance to petroleum based oils and hydrocarbon fuels



-60F to 300F Excellent
Excellent Good Excellent /
-75F to 450F Excellent Average
Excellent Excellent Average Medical and aerospace applications
5F to 390F Excellent Excellent Good Average Poor /

Neoprene Bellows Shape

bellow manufacturer.jpgrubber dust boot suppliers.jpg

                 Miniature Rubber Bellows                              Tapered Rubber Bellows

rubber flange bellows.jpgSquare rubber bellows.jpg

            Rubber Flange  Bellows                                  Square Rubber Bellows                   

Neoprene Bellows Properties:

Neoprene also known as choloprene, it is a common material used in rubber bellow and dust boot applications with many good performance:

1. Good oil & grease resistance
2. Good Tear Strength, compression & abrasion resistance
3. Excellent Refrigerants / Ammonia performance

4. Temperature Range (dry heat):  -40F to 250F

While neoprene has poor cold & fuel resistance, if the rubber bellows requires good cold & fuel resistance, should use other material.

CR bellows

neoprene bellows

Our company advantage for Neoprene Bellows manufacturing process:

1. Precision Own Mold-making Technology since 1998: 

2. In-depth knowledge of different elastomer rubber materials molded for rubber bellows, expansion joint & boots

3. Mature experience of flexible silicone rubber bellows quality controls:

a. Neoprene bellows wall thickness sizes telorance: less 0.05mm

b. mini or less expansion joint flashing

c. mold maintenance in aim to up and down mold plate with horizontal stripe in exact position

d. good ejected molding to improve silicone bellows production efficiency

4. Rapid prototyping with full sizes production equipment and production materials.

5. In-depth knowledge of overmolded metal + silicone rubber bellows production

rubber Bellows Design.jpg


Contacts with us

  86-18159020626
Do you have 3D drawing or sample? so that we can estimate the price for you.You can contact me at my e-mail address:
 Room No. 513-515, 5F, Culture Creative Park,
No.10 Huli Avenue, Huli District, Xiamen, China.(office)
 2F, No. 165, Tong'an Park, Industry cluster zone, Tong'an District, Xiamen, China (factory)
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