A GlassRenu Category 1 surface contaminant that presents as a faint cloudy or whitish haze on the exposed glass surface.
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Meaning and boundaries
Heat haze is treated as surface contamination in the GlassRenu system. Confirm that the condition is on the exposed surface and distinguish it from roll-wave distortion, anisotropy, corrosion, coating nonuniformity, furnace-roll marks, and internal IGU haze.
Why it matters in glass restoration
Correctly identifying heat haze as Category 1 directs the technician to a surface-contaminant process and avoids unnecessary glass removal or confusion with optical distortion.