[KongchangAI]
Unverified85% confidenceCautionTime unknown

原有旧填缝已发霉发黑的情况下,不建议直接在上面覆盖新填缝剂,霉菌会透过或在界面继续生长;必须先用美缝剂清缝勾(开缝器)清除旧缝并杀菌干燥后再施工

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