Natural Home reviews the best nontoxic caulks and sealants.
AFM Safecoat MexeSeal
Pros
Sealer for porous tile and masonry; SCS-certified, LEED-qualified
Cons
Not for use on polished surfaces
OSI GreenSeries Acrylic Urethane Indoor/Outdoor Sealant
Pros
Smooth bead; easy to handle
Cons
May contain pockets of material that can splatter
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