Liquid silicone sealant, Neutral General purpose silicone sealant,RTV,Fast curing

FOB Price: US $1.5 - 20 / Pack Get Latest Price
Min.Order Quantity: 5002000 Pack/Packs
Supply Ability: 1000,000 Ton/Tons per Year
Port: Shanghai, any port in China
Payment Terms: L/C,D/A,D/P,T/T,Western Union,MoneyGram,Escrow, Cash
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Quick Details

CAS No.: CAS# 112926-00-8 Other Names: silicone glue MF: xSiO2yH2O
EINECS No.: 231-545-4 Place of Origin: Shanghai China (Mainland) Classification: Other Adhesives
Main Raw Material: Silicone Usage:
Construction,Fiber & Garment,Footwear & Leather,Packing,Transportation,Woodworking,electronic
Brand Name: PUNADE
Model Number: SI3321 Price: 1.50-20$ MOQ: 500-2000pcs
Viscosity: 15000 Pa.s Component: one part Curing: 4min
Certification: ISO9001,MSDS, Test Report etc. Temperature: -60-200 ℃ Valid time: 20-30years
Manufacture: R&D Manufacturer other adhesive: epoxy,acrylic,polyurethane

Packaging & Delivery

Packaging Detail: 310ml Tube per pc, 25pcs per caton Size: 265mm*260mm*260mm=0.018cbm 38500pcs per 20ft container, 1375pcs per cbm
Delivery Detail: 7-10days for sample, 15-20days for cargo


1. Curing time: 4 mins
2. Use in -60--200 degree
3. Valid 20-30 years
4. MSDS and ISO9001
5. Factory


Senior Member of Shanghai International Chamber of Commerce


 R&D Manufacturer




No Curing

Testing Term

Testing Standard








GB/T 10247-2008




GB/T 13354-92



Curing Speed




Fully Cured


GB/T 531.1-2008

Shore A


Thermal Conductivity

GB/T 10297-1998



Expansion Coefficiency

GB/T 20673-2006



Elongation at break

GB/T 528-1998



Tensile Strength

GB/T 528-1998



Tensile-shear strength

GB/T 6328-86



Dielectric Strength

GB/T 1693-2007



Dielectric Wastage

GB/T 1693-2007



Dielectric Constant

GB/T 1693-2007



Volume Resistance

GB/T 1692-92

(DC500V)Ω· cm




RTV Si3321 is room temperature curing one component organic silicone pouring sealant with low viscosity. As a kind of self-levelling and flowing dealcoholized one component room temperature curing silicon rubber, Si3321 exactly complies with the requirements of the EU ROHS.



  1. Moisture, dust and corona proof, cushion and earthquake proof
  2. Good extreme temperatures bearing, -60~200°C
  3. Excellent ageing-resistance and corona resistance
  4. No yellow and leakage after curing, excellent comprehensive performance



Widely used in electronics, industrial, aerospace, automotive, marine, rail vehicles, communications, household appliances, electric power, medical, LED, semiconductor, new energy as well as the protection of sensitive circuits and components






  1. Cleaning: cleaning the surfaces that to be glued and coated, removing the rust, dust, greasy dirt and other foreign matter and substance.
  2. Gluing: cutting nozzle to the required angle, extruding the liquid cement to the cleaned surface and making it well-distributed (to these sealing rubber hose, pierce the sealing with the tip end), then folding and fixing the glued surfaces.
  3. Curing: placing sealed components in the air to make them cured naturally. Put into use after 24 hours’ room temperature curing.




Tightening and sealing preserve the leftover sealant after the operation. Removing the cured cement at the sealing part that might happen during the preservation, it could be normally used again.


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Shanghai Sepuna Chemical Co.,Ltd is a subcompany of PUNADE INTERNATIONAL GROUP, Sepuna is a professional industry adhesive supplier ,manufacturing polyurethane/silicon/epoxy sealant and adhesive,has nearly 10 years history.
In 2005 Sepuna introduced PUNADE technology from Switzerland.
Via the ISO90001:2000 certification.
In 2013 Sepuna introduce Drawing Machine technology and has put it into producing formally now.

Sepuna has professional factory which area is 5.000 squaremeters,and has ... View detail

Basic Information

Product/Service (We Sell): Polyurethane Adhesive,Polyurethane Sealant,Epoxy Adhesive,Silicone Adhesive  
Brands: PUNADE  
Number of Employees: 101 - 200 People  

Trade & Market

Main Markets: Central America
South Asia
Northern Europe
Domestic Market
Eastern Asia
Southern Europe
Southeast Asia
Mid East
Western Europe
Eastern Europe
South America
North America
Total Annual Sales Volume: US$50 Million - US$100 Million  
Export Percentage: 81% - 90%  

Factory Information

Factory Size (Sq.meters): 3,000-5,000 square meters  
Factory Location: Shanghai Minhang District  
Number of Production Lines: 10  
Number of R&D Staff: 11 - 20 People  
Number of QC Staff: 5 - 10 People  
Contract Manufacturing: OEM Service Offered   Design Service Offered   Buyer Label Offered  

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China (Mainland) | Manufacturer, Trading Company | Contact Details
Experience: Established 2010

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