Claimed Benefits:

• Reduced Heat Gain: These coatings aim to reflect infrared (IR) radiation, a major component of solar heat, keeping your home cooler in summer.
• Improved Energy Efficiency: By reducing heat gain, they can potentially lower your air conditioning usage and energy bills.
• Transparent Application: Many liquid coatings are advertised as transparent, allowing for a clear view out the window.

Technology and Types:

• Liquid Nano-coatings: These are a popular option, often containing silicon-based solutions that create a microscopic film on the window.
• Other Formulations: There might be other types of liquid coatings with varying compositions and functionalities.

Limitations to Consider:

• Limited Independent Verification: Since this is a developing technology, independent verification of manufacturer claims regarding effectiveness and durability might be scarce.
• Potential for Reduced Visibility: While transparency is claimed, some coatings might have a slight negative impact on how clearly you see through the window.
• Durability Concerns: The effectiveness of these coatings might diminish over time, especially with exposure to harsh weather. Reapplication may be necessary.
• Focus on Heat Reduction: The primary benefit seems to be heat control. Energy efficiency improvements beyond heat reduction might be limited.