One component modified polyurea waterproof anticorrosion protective coating
Product description
STWD9528 is a one-component aromatic-modified polyurea waterproof and anti-corrosion protective coating material. This product exhibits excellent adhesion to both concrete and steel substrates, and features simple application that does not require specialized polyurea spraying equipment. Owing to its unique chemical structure, the cured coating film demonstrates outstanding chemical medium resistance and superior waterproofing performance, rendering it an ideal material for waterproof and anti-corrosion protection applications. Its characteristics of high elasticity and high bond strength make it particularly suitable for waterproofing projects of building roofs, balconies, bathrooms, exterior walls and basements, and is especially applicable to the renovation of old roofs constructed with SBS membranes as well as anti-corrosion and waterproofing treatment of old profiled colored steel tile roofs.
Product features and advantages
*High solid content, low VOC emissions
*The application method is simple and does not require professional polyurea spraying equipment. It can be applied by brush, roller, or high-pressure airless machine.
*The coating has good flexibility, strong leakage resistance, and excellent waterproof performance.
*Excellent resistance to chemical medium corrosion, capable of withstanding certain concentrations of acids, alkalis, salts, oils, organic solvents, etc
*Excellent adhesion, which can quickly and firmly bond to the surface of substrates such as concrete, steel, wood, glass fiber, etc
*Wide temperature range for use ranging from -50 ℃ to 120 ℃
*It is one component material, easy to apply, without the need for mixing, reducing labor costs
Application scope
Construction, water conservancy, transportation, chemical industry, electricity, etc. For example, waterproofing of building roofs, bathrooms, exterior walls, basements, water conservancy dams, hydropower station buildings, etc. Especially for the repair of old SBS membrane material roofs and the anti-corrosion waterproofing of old colored steel tile roofs.
Product information
| Item | Results |
| Appearance | Color is adjustable |
| Specific gravity (g/cm3)） | 1.25±0.05 |
| Viscosity (cps )@20℃ | 7500±500 |
| Solid content (%) | ≥80 |
| surface dry time (hrs) | 2-4 |
| Pot life (hrs) | 1h |
| theoretical coverage | 0.75kg/m2(thickness 500um) |
Physical properties
| Item | Test standard | results |
| Hardness (Shore A) | ASTM D-2240 | 78 |
| Elongation (%) | ASTM D-412 | 400 |
| tensile strength (Mpa) | ASTM D-412 | 13.5 |
| Tear strength (kN/m) | ASTM D-624 | 52 |
| abrasion resistance(750g/500r),mg | HG/T 3831-2006 | 10 |
| Adhesive strength (Mpa) steel base | HG/T 3831-2006 | 8 |
| Adhesive strength (Mpa) concrete base | HG/T 3831-2006 | 3.3 |
| impact resistance (kg.m) | GB/T23446-2009 | 1.0 |
| Density (g/cm3) | GB/T 6750-2007 | 1.25 |
Chemical properties
| Acid resistance 10%H2SO4 or10%HCl,30d | no rust, no bubbles, no peel off |
| Alkali resistance 10%NaOH, 30d | no rust, no bubbles, no peel off |
| Salt resistance 10g/L,30d | no rust, no bubbles, no peel off |
| Salt spray resistance, 2000h | no rust, no bubbles, no peel off |
| Oil resistance | no bubbles, no peel off |
| 0# diesel, crude oil, 30d | no rust, no bubbles, no peel off |
| (For reference: pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requiring detail data.) | |
Application instructions
Recommended dry film thickness: 300-1000um (or as design requirements)
Coating interval: 4-24 hours. If the re-coating time exceeds 24 hours or there is dust on the surface, It is recommended to use sandpaper to polish and clean before application.
Recommended coating methods: brush, roller, high-pressure airless spraying.
Application environment
Environmental temperature: -5~35 ℃
Relative humidity: 35-85%
Dew point: When applying on metal surfaces,the surface temperature must be 3 ℃ higher than the dew point temperature.
Substrate treatment
Metal surface: It is recommended to sandblast for rust removal, reaching Sa2.5 level according to ISO8501-1 or GB8923 standards.
Concrete surface: achieve a sturdy, dense, flat, clean, and dry state. There should be no phenomena such as sanding, peeling, cracks, honeycomb pits, etc. Usually, it needs to be repaired with putty.
Wood surface: clean, dry, free from burrs, debris, and loose debris.
Consult STWD technical personnel for the surface treatment when apply on other substrate.
Application note
◆This product can be used at a low temperature of -5 ℃. When using in low-temperature environments, it is recommended to place the coating bucket in an air-conditioned room for at least 24 hours.
◆STWD recommends mixing the coating evenly before use, pour out the exact quantity that would use up, and quickly closing the lid of the barrel. The material after use shall not be returned to the original barrel.
◆ The coating viscosity of this product has been adjusted as needed before leaving the factory. Application personnel cannot add diluent without permission. If the viscosity needs to be adjusted due to changes of temperature, please consult the coating manufacturer and obtain guidance before adding special diluent.
Curing time
| Substrate temperature | Surface dry time | Foot traffic time | Solid cure |
| +10℃ | 5h | 24h | 7d |
| +20℃ | 3h | 16h | 6d |
| +30℃ | 2h | 8h | 5d |
Shelf life
* Package: 5kg/barrel, 25kg/barrel.
* shelf life: 6 months (sealed)
* Storage environment temperature: 5 ℃ -35 ℃
* store in cool and ventilated place, avoid sunshine direct exposure, keep away from heat.
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
SWD 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. SWD does not take any other responsibilities except the product quality and reserve the right of any modifications on the listed data without prior notice.
