Comens flex Non-sagging Polyurethane Construction Sealant for Roads

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1 Kilogram
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Company Information

Beijing Comens New Materials Co., Ltd.

CN Manufacturer, Trading Company
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Quick Details

Payment Terms: L/C,T/T,Western Union,MoneyGram
Supply Ability: 30000 Ton/Tons per Year
CAS No.: 9009-54-5
Other Names: construction sealant
MF: -C3H8N2O-
EINECS No.: 210-898-8
Place of Origin: Beijing China
Classification: Other Adhesives
Main Raw Material: Polyurethane
Usage: Construction
Brand Name: Comensflex
Model Number: joint sealant
Type: Non-sagging Pu Sealant
Uses: Roadway. Highway Driveway Runway Railway
Standard: ISO9001, ISO14001
Packing: 22.5kg+13.5kg/Pail
Export Markets: Global
Color: Black
HS Code: 3506100090
Cure Mechanism: Chemical Cure
Delivery Detail: 7 Working Days
Packaging Detail: 22.5kg+13.5kg/Pail

Two-Component PU (polyurethane) Sealant for Construction Joint Sealant which is thixotropic Sealant


1. Description
This product is a two-component polyurethane sealant for various joint sealing, which owns the features of good thixotropy, high elongation and good elasticity after A and B mixing. It is a high-performance polyurethane material for sealing and waterproofing for construction.

2. Uses
Concrete construction expansion joint, expansion joint of railway, airport runway, and highway/railway bridge.

3. Characteristics
1 Good thixotropy, easy to apply on vertical and inclined surface,
2) High solid content, high elongation, good water resistance, excellent durability and fatigue resistance.
3) Its service life is much longer than asphalt joint sealant.
4) The sealant is of high bonding strength, with no trickling at summer time or hardening and cracking at winter time.
5) It keeps an elastomer permanently, which is effective sealing and waterproofing.

4. Construction Technology
(1) Preparing Work
Expansion Joint Clearance
The expansion joint should be dry and clean with no sundries such as foam and matchwood, etc. Clear away the quicksand and oil. If necessary, clear away the sundries and quicksand with blower.

The clearance of the expansion joint is a factor of the good performance of the sealant. The wet or dirty expansion joint will cause bulge or falling down of the sealant. And the oil or dust will impact the bonding effect. Thus, there will be separation between the sealant and the surface under the cold condition. Comens will not shoulder the responsibility if there is quality problem due to the uncleaness of expansion joint.

According to the need, we usually suggest to use the PE pad under the joint, to avoid stress concentration due to bonding on three sides. The diameter of the round pad should be bigger than the 25% width of the expansion joint to avoid leakage of the sealant.

(2) Comensflex 8266A/B (Type N): Mixing ratio is 5: 1. As the two components are both of non-sagging, put the two components on the tray with the ratio and mix uniformly.

Comensflex 8266 A/B (Type N) is of two-component. The mixing ratio must be 5: 1 and assure uniformly mixed as the color appears uniform.

(3) Applying technology
Apply the mixture with spade or spatula into the joints. After working, no water can be put into the sealant within 24 hours.

(1) The work must be done at appropriate temperature. (Refer to From I).
(2) The consumption is different according to the depth of the expansion joints.
(3) The sealant must be applied in working time, or the work will be affected. (Refer to From I).
(4) The sealant must be conserved for at least 24hs at the humidity less than 80%RH, temperature 5-40.
(5) It does not affect usage if there is slight bubble or bulge after the sealant curing.
(6) The movement capability is 25LM, that is to say the deflection of the expansion joint should be less than 25% of the expansion joint.
Form I.jpg
5. Basic Techinical Information
1Levelability Even and smooth
2Tack-free timeh≤8
3Complete dry timeh≤12
4Elastic recovery rate%≥80
5Solid content%≥99
6Hardness (23c)Shore A20-30
7Water impermeability 0.4Mpa, 2h
8Elasticity modulus25±2cMpa≤0.3
9Tensile strengthStandard conditionMpa≥2.0
10Elongation at break (%)Standard condition%≥500
11Elasticity at low temperatureStandard condition-35cNo crack
12Bonding performance at definite elongationHeat treatment60% definite elongationNo breakage
Alkaline treatment
13Bonding strengthDry surfaceMPa≥1.0
Wet surface≥0.6

6. Storage and shelf life:
    Store in a cool and dry place. Avoid direct sunlight. If stored at the recommended conditions in original, unopened containers, this product has a shelf life of 12 months.


7. Packaging:
Comensflex 8266N (A):22.5kg/pail,
Comensflex 8266N (B):13.5kg/pail.
3 part Comensflex 8266N (A) match with 1 part Comensflex 8266N (B)


8. Production Base and Marketing Network


--- Beijing: 2 factories of 37000 squre meters

--- Nantong in Jiangsu Near to Shanghai 107000 squre meters


--Existed in more than 40 countries and regions in the world


9.Office and Workshop

10. Draft of Certification
Production Certificate
11. TDS, MSDS can be provided accordingly