Heat-resistant paint for roofs (metal roofs, tile roofs, cement) can reduce the temperature by up to 15°C, helping to cool the roof, providing good insulation, reducing heat transmission, and reflecting sunlight.
A good heat-resistant paint needs two characteristics: insulation and the ability to reflect heat from the sun. With advanced material technology, 3M glass beads from Hitta can enhance the heat-resistant efficiency of roof paint as well as increase the paint’s durability. Our expertise can help in producing paint that offers an excellent solution for insulation and heat reflection from solar energy.
Heat-resistant paint containing 3M glass beads can reflect up to 90% of infrared rays and 85% of UV rays (depending on the paint formula), making it the best solution for roof painting. As a result, users are relieved from the increasing heat due to solar heat transmission.
Heat-resistant paint with 3M glass beads can reduce roof temperatures by up to 15°C, correspondingly reducing indoor temperatures, creating a better living and working environment. The 3M glass beads mixed into the paint do not emit additional odors, thus maintaining the surrounding air quality.
Heat-resistant paint for roofs, also commonly known as reflective or insulating paint, is a highly effective and convenient solution for cooling homes. This paint can be applied not only to roofs (metal, tile, cement) but also to any surface that is directly or indirectly exposed to sunlight, thereby effectively lowering the overall temperature of the entire house.
The high infrared reflectivity of 3M glass beads helps ensure that heat-resistant paint absorbs very little heat and tends to dissipate it easily over time. With their hollow internal structure, which is essentially a vacuum, 3M glass beads also provide insulation. Consequently, heat-resistant paint with 3M glass beads extends the lifespan of surfaces by preventing thermal expansion. In addition to temperature control, the 3M glass beads in heat-resistant paint reflect UV rays, which are the primary cause of surface aging and degradation.
left: using 3M bubble glass.
Operating Principle of Heat-Resistant Paint for Roofs
The paint operates on the principle of continuously eliminating infrared and UV rays, resulting in less solar heat being absorbed by the surface. The remaining heat is insulated by the internal vacuum layer (thanks to the hollow structure of the 3M glass beads). This dual effect can improve temperature reduction by up to 15°C. The bead structure also provides a smooth, uniform membrane for the heat-resistant paint, preventing dirt and pollution, keeping the coating clean and effective with minimal maintenance.
Results Achieved with Heat-Resistant Paint
- The building remains cool even during peak summer.
- Humidification and air conditioning costs can be reduced by up to 40%.
- Roof temperatures can be significantly lowered by up to 15°C during peak summer.
- Provides dust and water resistance.
- Fills small cracks and joints, preventing leaks.
- Low application and maintenance costs.
- Environmentally friendly solution (non-toxic, low VOC, energy-saving).
- Ensures consistent, uniform coverage when mixed into various paints.
Additional Advantages
- UV Protection: Eliminates UV rays, reducing yellowing of the paint. The paint ages less, resulting in a longer lifespan.
- Energy Cost Savings: Due to excellent solar heat reflection and insulation, it lowers roof temperatures. Less heat transfer reduces indoor temperatures and can save up to 40% on air conditioning, fans, and misting systems.
- Solvent-Free: 3M glass beads do not require any special additives to be mixed into the paint.
- Low-Cost Application and Maintenance: No regular maintenance costs. Roofs are automatically cleaned by rainwater as the 3M glass beads in the paint prevent dust from sticking.
Uses of Heat-Resistant Paint
Heat-resistant paint is widely used, not only for roofs, walls, and cement or concrete surfaces but also for many other surfaces due to its superior heat resistance. Heat-resistant paint with 3M glass beads can be applied to various surfaces such as galvanized steel, polycarbonate, asbestos, plastic, etc. Below are some common applications of heat-resistant paint.
| Warehouse | Factory |
| Apartment building | Residential house |
| Container | Silo |
| Shopping center | Hospital |
Technical Analysis of Heat Reflection Capability
Sunlight reflection is achieved by scattering visible radiation and infrared rays.
- The ultraviolet range, from 200 to 400 nm, represents 5% of solar light energy.
- The visible spectrum, from 400 to 700 nm, represents 46% of solar light energy.
- The infrared range, from 700 to 2500 nm, represents 49% of solar light energy.
The total solar radiation at normal levels is approximately 1.3 kW/m2.
Due to their hollow structure, 3M glass microspheres have a low refractive index, close to 1.0, much lower than the refractive index of other conventional materials. Therefore, their scattering efficiency in the visible and near-infrared regions is superior.
To quantify the impact of hollow glass microspheres on sunlight reflection, an experiment was conducted as follows:
Six types of paints were prepared with the same pigment volume concentration (PVC) of 65%. Titanium dioxide (TiO2) was added at 15%, with the remaining 50% consisting of calcium carbonate (CaCO3) or 3M hollow glass microspheres type S22 as shown in the table below:
| Paint # | CaCO3 | S22 |
|---|---|---|
| 1 | 50 | 0 |
| 2 | 40 | 10 |
| 3 | 30 | 20 |
| 4 | 20 | 30 |
| 5 | 10 | 40 |
| 6 | 0 | 50 |
The total solar reflection of the coating was measured using a UV-Vis-NIR spectrophotometer according to ASTM E903-96 standard.
Test Results:
The solar energy reflection coefficient of the heat-resistant paint with 3M glass microspheres was calculated using the ASTM E903-96 method and reference data for solar radiation from ASTM G173-03:
| Sample | Total Reflection | UV | Visible Spectrum | Near-Infrared Region |
|---|---|---|---|---|
| 0% 3M glass microspheres type S22 | 78.4 | 82.6 | 87.9 | 69.0 |
| 50% 3M glass microspheres type S22 | 82.9 | 86.4 | 90.4 | 75.4 |
The improvement in solar energy reflection is mainly in the Near-Infrared region, accounting for nearly 50% of total solar energy. Thermometers were installed in both houses, and temperatures were recorded over a period of time. In a stable state, the average temperature was lower by up to 15°C in the house with heat-resistant paint with enhanced heat reflection capability.
Heat-Resistant Paint Formula for Roofs
The composition of the paint plays a crucial role in determining its heat-resistant properties, both in terms of heat reflection and insulation. When mixed into the paint, 3M glass microspheres provide both heat reflection and insulation capabilities, making it a superior option in the current market.
Read more: Làm sao để chế tạo sơn cách nhiệt, chống nóng từ sơn thường?
Sample Heat-Resistant Paint Formula:
Utilization of 3M glass microspheres S22
| Raw Material | Density (g/cc) | Weight | Weight (%) | Volume (%) | Dry Volume (%) |
|---|---|---|---|---|---|
| Water | 1.00 | 47.64 | 22.18 | 23.82 | 0.00 |
| Wetting & dispersing agent | 1.16 | 0.87 | 0.40 | 0.37 | 0.23 |
| TiO2 | 4.10 | 61.50 | 28.62 | 7.50 | 15.00 |
| Acrylic resin dispersion | 1.09 | 81.88 | 38.11 | 37.56 | 31.72 |
| 3M Glass Microspheres S22 | 0.22 | 11.00 | 5.12 | 25.00 | 50.00 |
| Thickening agent 1 | 1.05 | 2.21 | 1.03 | 1.05 | 1.00 |
| Thickening agent 2 | 1.04 | 9.45 | 4.40 | 4.55 | 2.00 |
| Anti-foaming agent | 1.00 | 0.29 | 0.14 | 0.15 | 0.05 |
| Total | 1.07 | 214.85 | 100.00 | 100.00 | 100.00 |
Utilization of 3M glass microspheres S38
Here’s the provided information organized into a data table:
| Raw Material | Density (g/cc) | Weight | Weight (%) | Volume (%) | Dry Volume (%) |
|---|---|---|---|---|---|
| Water | 1.00 | 47.64 | 21.38 | 23.82 | 0.00 |
| Wetting & dispersing agent | 1.16 | 0.87 | 0.39 | 0.37 | 0.23 |
| TiO2 | 4.10 | 61.50 | 27.60 | 7.50 | 15.00 |
| Acrylic resin dispersion | 1.09 | 81.88 | 36.74 | 37.56 | 31.72 |
| 3M Glass Microspheres S22 | 0.38 | 19.00 | 8.53 | 25.00 | 50.00 |
| Thickening agent 1 | 1.05 | 2.21 | 0.99 | 1.05 | 1.00 |
| Thickening agent 2 | 1.04 | 9.45 | 4.24 | 4.55 | 2.00 |
| Anti-foaming agent | 1.00 | 0.29 | 0.13 | 0.15 | 0.05 |
| Total | 1.07 | 222.85 | 100.00 | 100.00 | 100.00 |
Please note: This is just a sample formula. For specific formulations and expert advice, please contact Hitta.
Buying Heat-Resistant glass bubble for Paint
Hitta is one of the leading certified distributors of 3M in Vietnam. With a team of experts, engineers, and specialists with over 10 years of experience with 3M products and solutions, Hitta is your expert advisor to find the most suitable and best solution. To purchase 3M glass microspheres for heat-resistant paint (insulation, heat reflection), please contact us:
- ☎️ Hotline: 090.8611.011 (Mr. Dương).
- ✉️ Email: hittajsc@hitta.vn