A rubber strip (also called a sealing strip or gasket profile) is a long, extruded rubber product widely used in equipment, vehicles, and construction. Its primary function is to fill gaps between mating surfaces using its elasticity, providing sealing, waterproofing, dustproofing, sound insulation, vibration damping, and fixing capabilities.

Rubber strips are used in virtually all industrial sectors.

Building & construction – Sealing doors, windows, and curtain walls for waterproofing, windproofing, sound insulation, and energy saving.
Automotive manufacturing – Sealing car doors, windows, engine compartments, and trunk lids for waterproofing, dustproofing, sound insulation, and vibration damping.
Machinery & equipment – Sealing cabinets, enclosures, and pipework to prevent ingress of dust, moisture, and fluids.
Home appliances & electronics – Door seals for refrigerators, washing machines, ovens, and electronic device housings for sealing, insulation, and vibration damping.
Rail transportation – Sealing train doors, windows, and inter-car connections to ensure air tightness and sound insulation.

Rubber strips can be manufactured in various cross-sectional shapes to suit different installation and sealing needs.

Round (O-ring profile) – The most common type, used as a sealing ring or simple linear seal.
Square / Rectangular – Provides a wider sealing surface, often used for flat-surface sealing.
Custom profiles – Tailored to specific applications (e.g., U-shaped, P-shaped, D-shaped) for complex mounting structures.
Hollow / Foam – Lightweight, soft, with excellent thermal insulation, sound absorption, and vibration damping.

The performance of a rubber strip is mainly determined by its material. Selection depends on the specific working environment (temperature, media contact, etc.).

The dimensions and performance of rubber strips are governed by national standards.
Dimensional notation – For round rubber strips (O-ring profile), the specification is usually given by cross-sectional diameter (C/S). Common sizes include φ1.78 mm, φ2.62 mm, φ3.5 mm, φ5.7 mm, etc. Square strips are available in sizes such as 6×6 mm, 10×10 mm, etc.
Relevant standards:
GB/T 3672.1 – Specifies dimensional tolerances for rubber products.
GB/T 5574-2008 – Basic national standard for rubber sealing strips.
GB/T 30649-2014 – Rubber components for sound barriers (used in railways, highways, etc.).

Q 1. What's the payment term?
A: We accept T/T 50% advance ,   50% balance before booking shipping date. 

 

 Q 3. What is your standard packing?
A: All the goods will be packed by carton box and loaded with pallets. Special packing method can be accepted when needed.

Q 4. Could you please tell us the month capacity of your products ?
A: It depends on which model, we produce more than 500 tons rubber materials per month.

Q 5. what kind of certificates you have ?
A1: We have been ISO9001:2015 and ISO14001:2004 certified by SGS since 2015.
A2: We have various rubber compounds approved by ROHS and REACH.

Q6: How to check the quality of the bulk order?
A1: We provide preproduction samples before mass production for all customers if needed.
A2: We accept third party inspection such as TUV, INTERTEK, BV, etc.

Q 7: Do you use any international standards for the rubber products?
A: Yes, we mainly use GB/T3452.1-2005 standard to define the quality of the rubber materials.

Q8: What materials are available to produce from your side?
A: NBR, EPDM, SILICONE, FPM(FKM), PTFE,POM,PU,NEOPRENE(CR), NR, IIR, SBR, ACM, AEM, Fluorosilicone(FVMQ), FFKM, Liquid Silicone, Sponge, etc. 

Q9: Do you provide maintenance on tooling?
A: We maintain all tooling and will replace as needed.

Q10: How many empolyees you have?
A:We have 25 empolyees at time of December 2024. 

Customer can choose 4ways for get the goods.

NINGBO PALT IMPORT AND EXPORT CO.,LTD (The factory name is Huan Ling Sealing  )the products including the O-rings, Flat washer, rubber rings, ED-Ring,Bonded seal,PTFE rings, O-ring Kit,rubber ball, Y-rings,Rubber Strip,Piston U-seal,Rod U-seal,Glyd-Ring,Sitefeng seals, v-shaped rings, X-rings and other various non-standard rubber.In addition,The main material can be NBR, EPDM, FKM, , AFLAS, CR, Butyl, HNBR, SILICON, FFKM, PU or approved by  etc.

Huan Ling Sealing has the product is made of imported raw materials, quality excellent, the company products have been exported to Europe and the United States, the feedback is good, is a broad seal users trustworthy company.

Huan Ling Sealing established in 2011. Huan Ling Sealing is a professional rubber products manufacturer .Business involves the engineering machinery, plastic machinery, hydraulic press, compressor, die-casting machine, ceramic machinery, port machinery, metallurgical machinery, steel, steamboat manufacturing, coal mine machinery, chemical machinery, light industry machinery, mining machinery and machine tools, and other fields and industries.