In response to deadly smoke inhalation incidents, fire codes now mandate silicone rubber intumescent seals. FireStop International’s polysilazane-enhanced seals expand 10x when heated, creating 1200°C-resistant foam barriers at door edges. Chengdu skyscraper tests confirmed 25+ minutes of smoke blockage – exceeding new national requirements by 150%. "Traditional rubber seals fail at 300°C; ours withstand fourfold higher temperatures," notes CTO Dr. Zhang. Emergency services nationwide are retrofitting critical infrastructure with the technology. 
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