AZ-400-LSW is an extremely low off-gassing organic white thermal control paint developed for use on spacecraft and satellites to coat hard anodized aluminum. A specialized pigment in a silicone binder, AZ-400-LSW can be spray deposited with an air brush or high-volume low-pressure system with the ease of other silicone paints to form a flexible organic nonspecular white marker paint. AZ-400-LSW meets flammability and toxicity requirements of NHB 8060.1C.
The main advantage of AZ-400-LSW relative to AZ-93 and AZW/LA-II is that it has similar very low outgassing but does not require controlled temperature and humidity when applying.
The table below lists the optical and application parameters of cured AZ-400-LSW.
| Nominal Surface Resistivity | N/A |
| Thermal Emittance (ε_t) | 0.89 ± 0.02 |
| Solar Absorptance (α_s) | 0.169 ± 0.02 at ≥ 3.0 mils thickness |
| Use Temperature Range | -180 C to 700 C |
| Appearance/Color | Nonspecular optical white |
| Nominal Dry Thickness | 3.0 ± 1.0mils (over 85% of coated area) |
| ASTM D3359A Adhesion Grade | Not less than 3A |
| Full Cure | 48 to 72 hours |
| Coating coverage estimates can be found here. | |
| The SDS can be found here. | |
View a typical spectral reflectance curve for AZ-400-LSW (pdf 27KB). Measurements were taken with AZ Technology’s Laboratory Portable SpectroReflectometer LPSR-300.
Note: terms reflectance, emittance and absorptance and terms reflectivity, emissivity and absorptivity are often used interchangeably.