Product Description
STWD9007 traffic tunnel special fire retardant polyurea is a 100% solid content aromatic polyurea elastomer. It not only has excellent physical properties of polyurea, but also can extinguish right after being deviated from fire, now it has been widely applied in Chinese tunnel projects.
Product features and advantages
*Solvent free, 100% solid content, safe, environmentally friendly and odor free.
*Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces, no sagging.
*Dense coating, seamless, with good flexibility
*High adhesive strength, can fast bond well on many substrate like steel, concrete, wood, fiber glass etc.
*Excellent impact resistance, abrasion resistance
*Excellent corrosion resistance and chemical resistance to acids, alkali, salts etc.
*Excellent waterproof performance
*Good shock absorbing performance
*Excellent resistance to temperature variation
*Fast cure, application site back to service quickly
*Excellent durability to reduce maintenance cost of service life
*Extend the service life of sprayed structure
Polyurea Application scope
Fire retardant anticorrosion waterproof protection of railways, road, urban subway and other transportation facilities.
Products information
| Item |
A |
B |
| Appearance |
Pale yellow liquid |
Adjustable color |
| Specific gravity (g/m³) |
1.15 |
1.2 |
| Viscosity (cps) @25ºC |
700 |
680 |
| Solid content (%) |
100 |
100 |
| Mix ratio (by volume) |
1 |
1 |
| Gel time (second) @25ºC |
4-6 |
| Surface dry time (second) |
15-40 |
| Theoretical Coverage (dft) |
1.08kg/m2 Film thickness 1mm |
Physical properties
| Item |
Test standard |
Result |
| Hardness (Shore A) |
ASTM D-2240 |
92 |
| Elongation rate(%) |
ASTM D-412 |
450 |
| Tensile strength(Mpa) |
ASTM D-412 |
16 |
| Tear strength (N/km) |
ASTM D-624 |
62 |
| Impermeability(0.3Mpa/30min) |
HG/T 3831-2006 |
impermeable |
| Wearable(750g/500r)/mg |
HG/T 3831-2006 |
4.6 |
| Adhesive strength(Mpa)concrete base |
HG/T 3831-2006 |
3 |
| Adhesive strength(Mpa) steel base |
HG/T 3831-2006 |
11 |
| Density(g/cm³) |
GB/T 6750-2007 |
1.1 |
| Cathodic disbondment [1.5v,(65±5)ºC,48h] |
HG/T 3831-2006 |
≤15mm |
Chemical resistance
| Acid resistance 10%H2SO4 or 10%HCI,30d |
No rust, no bubbles, no peel off |
| Alkali resistance 10% NaOH, 30d |
No rust, no bubbles, no peel off |
| Salt resistance 30g/L,30d |
No rust, no bubbles, no peel off |
| Salt spray resistance, 2000h |
No rust, no bubbles, no peel off |
| Oil resistance 0# die sel, crude,30d |
No rust, no bubbles, no peel off |
| (For reference: the above data is acquired based on GB / T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data) |
Product application environment
| Environment temperature |
0ºC-45ºC |
| Product spray heating temperature |
65ºC-70ºC |
| hose heating temperature |
55ºC-65ºC |
| Relative humidity |
≤90% |
| Dew point |
≥3ºC |
Product application guide
| Recommend spray machine |
GRA CO H-XP3 Polyurea spray equipment |
| Spray gun |
Fusion-air purge or mechanical purge |
| Static pressure |
2300-2500psi |
| Dynamic pressure |
2000-2200psi |
| Recommend film thickness |
1000-3000μm |
| Recoating interval |
≤6h |
Application note
- Agitate part B uniform prior to application, thoroughly mix the deposited pigments, or the product quality will be affected.
- spray polyurea within the proper time if the substrate surface is primed. For the application method and interval time of STWD polyurea special primer please refer to STWD companies' other brochure.
- Always apply STWD spray polyurea on a small area before large application to check the mix ratio, color and spray effect are correct. For detailed information of application please refer to the latest instruction sheet of the application instructions of STWD spray polyurea series.
Product curing time
| Substrate temperature |
Dry |
Walking intensity |
complete solidify |
| +10ºC |
30s |
45min |
7d |
| +20ºC |
23s |
15min |
6d |
| +30ºC |
17s |
5min |
5d |
Note: the curing time varies with the environment condition especially the temperature and relative humidity.
Shelf Life
* From the manufacturer date and on the original package sealed condition:
Part A: 10 months
Part B: 10 months
*storage temperature:+5-35°C
Packing: Part A 220kg/drum, part B 200kg/drum
Make sure the product package sealed well
* store in cool and ventilated place, avoid direct sunshine exposure.
Product health and safety information
For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Material Safety Data Sheet containing physical, ecological, toxicological and other safety related data.
Integrity declaration
STWD guarantee all technical data stated in this sheet are based on laboratory tests. Actual testing methods may vary due to different circumstances. Therefore please test and verify its applicability. STWD does not take any other responsibilities except the product quality and reserve the right of any modifications on the listed data without prior notice.
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