Home Safety / Products / Caulk and Sealant Replacement (Silicone vs Polyurethane, Mold, VOC)

Caulk and Sealant Replacement (Silicone vs Polyurethane, Mold, VOC) — household safety profile

Low risk

Old caulk harbors mold that penetrates below the surface — must be removed, not cleaned over.

What is this product?

Old caulk harbors mold that penetrates below the surface — must be removed, not cleaned over. Silicone caulk: acetic acid off-gassing during cure. Polyurethane: contains MDI (skin sensitizer, gloves required). Latex/acrylic: lowest VOC, shortest lifespan. All caulks off-gas during cure: 24-72 hours for silicone, 7-14 days for polyurethane.

What's in it

Click any compound name for its full safety profile, regulatory consensus, and exposure data.

Contaminant

Solvent

Frequently asked questions

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Reference data, not professional advice. Aggregates publicly available regulatory and scientific information. Why we built ALETHEIA →