Material released from or carried across sealants, gaskets, waterproofing products, or joint compounds and deposited on glass by water or gravity.
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Meaning and boundaries
Runoff can contain uncured polymer, oils, plasticizers, surfactants, dirt, or weathering products. It is not necessarily silicone and may not be visible when dry.
Why it matters in glass restoration
Sealant-related films can streak, attract soil, change wetting, discolor glass, and require product-specific compatibility review.