Audited Supplier
STWD9011 Bridge piers special polyurea is a 100% solid content aromatic polyurea elastomer. It has excellent resistance to moisture, seawater erosion, and cathodic disbonding. It has high adhesive force with substrate which is a ideal material for bridge piers protection.
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 and adhesive strength
*Excellent impact resistance and abrasion resistance
*Excellent corrosion resistance and chemical resistance to acids, alkali, salts etc.
*Excellent penetration resistance 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 Product Applications
Anticorrosion waterproof protection of bridge piers that across the sea, river, rivers and across lakes.
Products information
| Item | A | B |
| Appearance | Pale yellow liquid | Adjustable color |
| Specific gravity (g/m³) | 1.12 | 1.05 |
| Viscosity(cps)@25ºC | 790 | 640 |
| 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) | 1.04kg/m2 Film thickness 1mm | |
Physical properties
| Item | Test standard | Result |
| Hardness (Shore A) | ASTM D-2240 | 91 |
| Elongation rate(%) | ASTM D-412 | 470 |
| Tensile strength(Mpa) | ASTM D-412 | 18 |
| Tear strength (N/km) | ASTM D-624 | 63 |
| Impermeability(0.3Mpa/30min) | HG/T 3831-2006 | impermeable |
| Wearable(750g/500r)/mg | HG/T 3831-2006 | 4.2 |
| Adhesive strength(Mpa)concrete base | HG/T 3831-2006 | 3.2 |
| Adhesive strength(Mpa) steel base | HG/T 3831-2006 | 11.2 |
| Density(g/cm³) | GB/T 6750-2007 | 1.02 |
| 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# di esel, 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) | |
Application environment
| Environment temperature | 0ºC-45ºC |
| Product pre-heat temperature | 65ºC-70ºC |
| Pipe pre-heat temperature | 55ºC-65ºC |
| Relative humidity | ≤90% |
| Dew point | ≥3ºC |
Application guide
| Recommend spray machine | GR ACO 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 | Foot traffic | Solid dry |
| +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.
