One-Component Silicone Sealant

A Common Product profile (CP) is a type of data record originally developed as part of a collaboration called the Quartz Project. The profiles are not specific to any manufacturer, but list the substances that are most commonly present in a product type. The CPs include a general description of the product type, a list of the most common substances serving each function in the product, and the health hazards associated with these substances. See the CP methodology here for more information.

This CP presents research done by Healthy Building Network alone following the completion of the Quartz effort.

Representative Manufacturers



One-component silicone sealants are comprised of silicon polymers, silicone oils, filler (typically limestone), biocides, and silanes that crosslink and cure these mixtures upon application in the presence of moisture. The most common systems, reflected in this record, are "neutral cure." "Neutral cure" sealants release methyl ethyl ketoxime, and are common in exterior applications, such as sealing door and window gaps, HVAC and other penetrations, as well as interior weathersealing applications. Acetyl cure systems, which release acetic acid, are more common in sanitary applications.

This information reflects our best understanding of product composition in 2016.


EC - CEPA DSL - Persistent, Bioaccumulative and inherently Toxic (PBiTE) to the Environment (based on aquatic organisms) from Octamethylcyclotetrasiloxane

US CDC - Occupational Carcinogens - Occupational Carcinogen from Titanium dioxide

EC - CEPA DSL - Bioaccumulative from Dimethicone (alternate CASRN is 9006-65-9)

EC - CEPA DSL - Persistent from Aquafil

MAK - Pregnancy Risk Group C from Amorphous silica subgroups (MAK list)

EU - GHS (H-Statements) - H361f - Suspected of damaging fertility from Octamethylcyclotetrasiloxane

ChemSec - SIN List - Endocrine Disruption from Octamethylcyclotetrasiloxane

US EPA - PPT Chemical Action Plans - Neurotoxicity - TSCA Criteria met from ARSENIC COMPOUNDS

GHS - Australia - H372 - Causes damage to organs through prolonged or repeated exposure from Silicon dioxide

EU - GHS (H-Statements) - H400 - Very toxic to aquatic life from arsenic compounds, with the exception of those specified elsewhere in Annex VI of Regulation (EC) No 1272/2008

GHS - New Zealand - 9.4A - Very ecotoxic to terrestrial invertebrates from Dimethicone (alternate CASRN is 9006-65-9)

See the Pharos record HERE for more details and the sources used to create this Common Product profile.

Last updated: May 17, 2018