Your Professional Rubber Supplier
TIANJIN GNEE BIOTECH CO., LTD. is a professional chemical raw material manufacturer. Our factory was established in 2016 and is located in Henan Province, covering an area of 3,600 square meters.
Our main products include PIB (low, medium, and high molecular weight), IIR, and halogenated butyl rubber.
Why Choose us
Experienced Team
We have a professional, well-equipped, and experienced R&D team with more than 10 years of expertise.
A Global Supply Chain
We maintain an established global supply chain, with our products successfully distributed across international markets, including the United States, Canada, Russia, Australia, and multiple regions throughout Europe.
Stable Quality
Committed to the principle of "quality first," we implement rigorous quality control protocols and systematic testing procedures to ensure consistently high product purity and reliable performance across all batches.
Parameter
|
Item |
Specification / Range |
|
Chemical Name |
Butyl Rubber / Isobutylene-Isoprene Rubber (IIR) |
|
CAS Number |
9010-85-9 |
|
Appearance |
White or off-white solid / crumb / powder |
|
Viscosity / Mooney Value (ML 1+4 @ 100°C) |
30 – 80 (depending on grade) |
|
Iodine Value |
≤ 1.0 g I₂/ 100g |
|
Volatile Matter |
≤ 1.0% |
|
Ash Content |
≤ 0.5% |
|
Solubility |
Soluble in aromatic and chlorinated hydrocarbons; insoluble in water |
|
Packaging |
25 kg / 50 kg bags, jumbo bags, or as required |
Benefits of Rubber
Incredible physical durability
Some materials need to withstand regular agitation. Butyl is able to take a beating over time without failing. This tough compound is able to take blow or deal with distress while maintaining seals and continuing any other job functions.
Low gas and moisture permeability
Butyl rubber has the distinction of being the only rubber material that is truly impermeable to both air and gas. While others may drastically limit airflow, butyl can completely prevent gas and oxygen from passing through a part. It also stops water and other moisture from seeping through, making it an ideal solution for seals, liners, and other parts that can’t have any leakage whatsoever.
Shock absorption
Butyl is one of the best rubber compounds for vibration and sound dampening. The material is known for being both durable and flexible, and those capabilities make it a natural choice for shock mounts, suspension bushings, and other parts that need to limit how much vibration and sound is made in an application.
Rubber Storage
Rubber products in storage can be adversely affected by the following: temperature, humidity, ozone, sunlight, oils, solvents, corrosive liquids and fumes, insects and up to 21° C with a maximum of 100° F (38° C).
If stored below 32° F (0° C), some products may become stiff and should be warmed before being placed in service. Rubber products should not be stored near source of heat, such radiators and base heaters. Rubber products should not be stored under conditions of high or low humidity.
To protect against the adverse effects of ozone, rubber products should not be stored near electrical equipment that may generate ozone and should not be stored for any lengthy period in geographical areas of known high ozone concentrations. Exposure to direct and reflected sunlight should also be avoided.
Application of Rubber
Due to its low gas and vapor permeability, butyl rubber is essential in manufacturing tubeless tires and inner tubes, where air retention is critical for safety and performance. This property also extends to sports-ball bladders and glove-box gloves, ensuring durability and airtight sealing in diverse applications.
Waterproofing and Roofing Membranes
Butyl rubber serves as an effective waterproofing liner in tanks and ponds, preventing leakage and contamination. It is commonly applied as a patching material for membrane roofs and used as a sealant for insulated windows, offering excellent resistance to weathering and environmental exposure.
Vibration Dampening Components
Its ability to absorb shock and reduce vibrations makes butyl rubber ideal for use in shock mounts, suspension bushings, and vehicle body mounts. The material also enhances acoustic performance, exemplified by its use in speaker cone edges where it has largely replaced foam for durability and sound quality.
Medical and Safety Applications
Butyl rubber is widely used to manufacture stoppers for labware and medical equipment, benefiting from its low permeability and chemical resistance. Its flexibility allows it to form effective seals in gas masks, providing reliable protection despite being less compliant than silicone rubber.

Delivery Information
Shipping Methods:
We offer a variety of shipping options, including sea freight, air freight, railway transportation, and international express delivery, to meet the diverse needs of our customers.
Estimated Delivery Time:
We will provide you with the estimated delivery time for your order, which will be clearly stated in the formal order to ensure your rights are protected, allowing you to arrange for the receipt of your goods in a timely manner.
Order Tracking:
We provide order tracking services, allowing you to stay informed about the current status and expected arrival time of your order. Detailed inspection information and shipping manifests, including photos and videos, are provided to ensure the security of your transactions.
FAQ
As one of the most professional rubber manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy bulk rubber in stock here from our factory. Contact us for customized service and free sample.













