• Sourcing Solutions
  • Services & Membership
  • Help & Community

Quick Details

  • CAS No.: 9009-54-5
  • Other Names: PU construction sealant
  • MF: CH3H8N2O
  • EINECS No.: 210-898-8
  • Place of Origin: Shanghai, China (Mainland)
  • Classification: Other Adhesives
  • Main Raw Material: Polyurethane
  • Usage: Construction, Transportation, airport runway, highway, road, pavement, basement, etc
  • Brand Name: SEPNA
  • Model Number: PU820
  • Type: runway joint sealant
  • Color: Gray
  • Shelf life: 6 months
  • Certificate: SGS, ISO9001:2008, MSDS, RoHS,Reach
  • Density: 1.35±0.1G
  • Skin dry time: ≤3h
  • Tack free time: 6-16h
  • Elastic recover rate: ≥90%
  • Elongation at break: ≥800%
  • Application temperature: 5~35°C
  • samples: avaliable

Packaging & Delivery

Packaging Details 20kg/ metal bucket, 240kg/drum
Delivery Time 10-15 days after receiving the payment



Product Display


PU820,single component, can be used for crack sealing of airport runway,

highway, basement.


PU820 can be directly used for crack sealing of airport runway,highway, basement.



1. One component, very easy for application, free solvent, non-toxic odorless after curing,
2. Self-leveling, excellent flowability, easy to scratch sewing operation
3. Durable flexibility, no crack, excellent sealing and waterproofing
4. High displacement, no crack, fall off, suitable for sealing kinds of concrete road
5. The new and used sealant has good compatibility, easy to repair
6. Excellent water resistant, oil resistant, acid and alkali resistant, resistance to puncture


Data Table


lApplication Points

  1.  Base surface requirement: dry, clean and non-pollution.
  2. Application tools: cutting machine, blower, pouring equipment, brush, shovel knife etc.

l  Application methods

  1. Application slot cutting: use the cutting machine to cut good application slot according to the designing and planning, with the application tools such as blower, brush, shovel knife etc. to remove the dust and debris, and sufficiently drying.
  2. The liner material placement: put the polyethylene foam strip slightly larger than the gap into the application slot, the depth is according to the application condition.
  3. Application: Put the sealant into the pouring equipment, the extruding sealant hose go deep into the bottom of slot, then inject the sealant to the application slot.
  4. Reserve gap: The application joint will expand with temperature changing, therefore, after application, the sealant should be lower than the road surface. In summer: 2-3cm, In winter: 1-2mm.
  5. Maintenance to tack free time, In summer: about 6 hours, In winter: about 12 hours.

l  Attention of operation

    1. Before application, should guarantee that the sealant is in the warranty period.

    2. This product is innocuous after curing completely, but before curing, please avoid to touch with eyes and skin. In case of               touch with eyes and skin, wash immediately and thoroughly with soap and water. If the situation is serious, please go to                 hospital.


Package & Storage


20kg/ metal bucket, 240kg/drum


When stored at 5~25°C, humidity≤50%RH in the original unopened containers, this product has a usable life of 6 months from the date of production. Do not store at temp. over 25°C, humidity over 80%RH.

Transportation: moisture proof, prevent the rain, prevent sunscreen, anti-high temperature, away from heat, handle with care, crush or collision is prohibited.


Production Process

Patent Certificate

Cooperation Brand


Packing And Shipping

Service Process



1.Q:Delivery time ?


A: Normally,delivery time of sample order is 7 to 10 days, standard order is 15-20 days.

2.Q:How to get samples ?

A: Normally,Sepna offer our customer 1-2pcs or 50-100g free samples for quality testing.

3.Q:How to be Sepna’s distributor ?

A: As the growing of Sepna’s global business,we need to find more and more distributors and agents worldwide.Sepna will provide the best solution and service for our partners. For more information,pls contact our salesperson or call us:+86-400-882-1323

4.Q:Any OEM service ?

A: Yes. Sepna can offer the customer OEM label service,and will give the protection of the your right in your market.

5.Q:Do you have MOQ ?


A:Yes.Normally,MOQ is 2000pcs or 1000kgs.

Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
China (Mainland) | Manufacturer, Trading Company
Transaction Level:
Supplier Assessments:
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $95,000
Learn More