এই জিনিসটা শীতকালে ঘর গরম রাখে | insulation foam

Look, this person’s foot got affected by insulation foam!
It’s actually a toxic spray that expands and hardens instantly when it comes in contact with air. Despite being hazardous, people use it in homes, especially in cold regions, because when applied on walls it blocks cold air from entering, keeping the indoors warm and cozy.

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