Is Benjamin Moore Ultra Spec Masonry Elastomeric Waterproof Coating toxic?

No paint is risk-free, and "toxic" depends on how much you're exposed to and for how long. Here is what Benjamin Moore's own documents show. Benjamin Moore Ultra Spec Masonry Elastomeric Waterproof Coating scores 15–23 out of 100 across its 17 sheens and bases. Its untinted VOC is 100 g/L. Its Safety Data Sheet carries these warnings: cancer warning (all versions) and organ toxicity warning (7 of 17 versions). We found no third-party emissions testing for it.

Health score

15–23

VOC g/L

100

Use

Exterior paint

Safety Data Sheet warnings

• Cancer warningall versionsContains Benzophenone, a suspected carcinogen present in the paint itself, not only as dust.
• Organ toxicity warning7 of 17 versionsMay affect organs through repeated or high exposure (for example solvent vapors).

Evidence beyond the label

• Emissions testing: none found
• Health certification: none found
• Full ingredient list (Health Product Declaration): not published

All 17 versions

• Flat · Base 1VOC <100 g/L · 1 warning23Bad
• Flat · Base 2VOC <100 g/L · 1 warning23Bad
• Flat · Base 3VOC <100 g/L · 1 warning23Bad
• Flat · Base 4VOC <100 g/L · 1 warning23Bad
• Flat · WhiteVOC <100 g/L · 1 warning23Bad
• Low Lustre · Base 1VOC <100 g/L · 1 warning23Bad
• Low Lustre · Base 2VOC <100 g/L · 1 warning23Bad
• Low Lustre · Base 3VOC <100 g/L · 1 warning23Bad
• Low Lustre · Base 4VOC <100 g/L · 1 warning23Bad
• Low Lustre · WhiteVOC <100 g/L · 1 warning23Bad
• Flat · Amherst GrayVOC <100 g/L · 2 warnings15Bad
• Flat · Butte RockVOC <100 g/L · 2 warnings15Bad
• Flat · Cape May CobblestoneVOC <100 g/L · 2 warnings15Bad
• Flat · ClayVOC <100 g/L · 2 warnings15Bad
• Flat · Maple ShadowsVOC <100 g/L · 2 warnings15Bad
• Flat · NimbusVOC <100 g/L · 2 warnings15Bad
• Flat · Vanilla MilkshakeVOC <100 g/L · 2 warnings15Bad

Updated October 12, 2026. Scores summarize the evidence makers publish. They don't guarantee safety or predict individual health outcomes. No brand pays to be listed. How we score