A Quick 5-Step On-Site Inspection Method for Consumers
Check the sealant: High-quality insulated glass features a uniform, elastic black sealant around the edges that does not crumble when the corner is gently picked at; inferior sealant peels off in large chunks under slight pressure, making the unit highly prone to moisture ingress and fogging later on.
Smell the edges: Get close to the edge of the glass and sniff; immediately reject any unit with a strong, pungent odor, as this indicates the use of low-quality raw materials (such as the butyl rubber) that will continuously release harmful substances.
Examine visual details: Look for sealant that is fully applied without air bubbles or breaks; ensure there are complete labels on both the inner and outer panes indicating the brand and applicable standards, as mass-produced products generally offer more reliable quality.
Inspect the aluminum spacer: Observe the corners against the light; bent aluminum spacers have only one or two joints that are fully sealed, offering far superior waterproofing compared to "plug-in" corner spacers with multiple seams.
Feel the butyl rubber:Lightly touch the primary seal area to feel for deep black, highly adhesive butyl rubber; if the material feels mushy, tears off easily, or has been substituted with double-sided tape, it is a product of shoddy workmanship.