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Quick Details

  • Type: Other Fireproofing Materials
  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: gysm
  • Model Number: FD102
  • Density: 1.6-2.0g/cm
  • Material: ROCK WOOL
  • Tensile Strength: 8-15MPa
  • Application: Sealing Material

Packaging & Delivery

Packaging Details In woven plastic bag
Delivery Time 2 days


Dusr free rock wool  packing 

The series of rock wool  products handled and exported by our corporation consist of rock wool yarns ,rock wool packing ,rock wool tape ,rock wool cloth ,rock wool gloves ,compressed rock wool  fibre joint sheets and lubricate rock wool  packing ,etc .Possessing the properties of fireproof ,heat insulation ,thermal retention ,electric insulation and alkali resistance ,etc .These gasket and sealing stuff are essential to modern machinery ,electrical machinery ,steamship boiler ,electrical engineering and other industries .
     Our rock wool  products are made of high quality materials with skillful workmanship .With their excellent quality and complete range of specifications ,they are warmly welcomed by customers both at home and abroad . 
There are two type of asbestos fiber yarn, dust free and with dust
     Dust free yarn: composed of around 99% rock wool  fiber and 1% chemical powder, color: white, temperature: 550℃ degree .
 Dusted yarn: composed by around 70-85% rock wool  fiber and 15-25% cotton fiber, color: white, temperature: 250-550℃ degree, according to quality grade of rock wool  fiber, it can be divided into five grades: common, A grade, AA grade, AAA grade, and AAAA grade, different grade has different temperature resistance and tensile strength, the yarn can be reinforced by glass - fiber yarn, brass yarn, and stainless steel yarn according to requirement.








rock wool  content







Ignition loss

















Certificate of Ruifeng:


Packaging & Shipping

Package(Per Spool) of Graphite And PTFE Packing:


Regular:3m, 8m, 1kg, 1 pound, 2.5kg, 2.5 pound, 5kg, 5 pound,10kg, 10 pound.

Other packages are available on request


Package Choise of Gland Packing:


Ningbo Gongyao Sealing Materials Co., Ltd. is established in 1965. We mainly supply sealing gland packing, asbestos products, fiberglass products, carbon fiber products, ceramic fiber products, expanded graphite products, and PTFE products. 

We are one of the largest manufacturers of sealing, fireproof, and heat insulation in china at present. We have 6,500 square meters building in the south factory, and another 13,300 square meters in the north, with more than 200 skillful employees. Our company invested in Xuxi county of Jiangsu Province at the beginning of 2005, set up a new production base in order to seek development. 

Our enterprise objective is: based on sincerity, the high quality at low price strives for the survival; the technical innovation strives for the development. 

We are sincerely looking for partners to develop and cooperate together in new business opportunities in the principle of mutual benefit. If you are interested in any of our products, please feel free to contact us for more information.


Company Name: 
Ningbo Ruifeng Sealing Materials Co., Ltd.


Operational Address: 
No. 2, Tanghe Road, Kuangyan Town, Cixi, Ningbo, Zhejiang, China (Mainland)




Website on alibaba.com: 



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China (Mainland) | Manufacturer, Trading Company
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