Flex Seal has a 10 page MSDS (Material Safety Data Sheet) from its own manufacturer. Here are a few excerpts:
3. HAZARD IDENTIFICATION EMERGENCY OVERVIEW: This product is a brown to black liquid or semisolid with a mild petroleum odor. The primary health hazards associated with this product under normal and recommended circumstances of use are from mechanical irritation of exposed tissues. This product is not flammable in emulsion form. Thermal decomposition of this product can produce black, sooty smoke, irritating vapors, and toxic gases (e.g., carbon oxides, nitrogen oxides, sulfur oxides). This product is not normally reactive. This product may be harmful to contaminated terrestrial and aquatic life. Emergency responders must wear proper personal protective equipment of for the situation to which they are responding.
12. ECOLOGICAL INFORMATION ENVIRONMENTAL STABILITY: Hydrocarbons (such as the main components of this product) are not photolyzed or hydrolyzed to any great extent. This product will not evaporate or biodegrade readily in the environment. All work practices should be aimed at preventing releases to the environment. In the event of a release to soil, the contaminated soil should be removed if possible. Additional environmental data for components of this product are provided as follows: ASPHALT: Solubility: Insoluble. Biodegradation: The biodegradation of both an n-alkane and several carboxylated cycloalkanes was examined within tailings produced by the extraction of bitumen from the Athabasca oil sands. The carboxylated cycloalkanes examined were structurally similar to naphthenic acids that have been associated with the acute toxicity of oil sand tailings. The biodegradation potential of naphthenic acids was estimated by determining the biodegradation of both the carboxylated cycloalkanes and hexadecane in oil sand tailings. Carboxylated cycloalkanes were biodegraded within oil sand tailings, although compounds with methyl substitutions on the cycloalkane ring were more resistant to microbial degradation. Microbial activity against hexadecane and certain carboxylated cycloalkanes was found to be nitrogen- and phosphorus-limited. (Type of asphalt used in this test report not indicated) EFFECT OF MATERIAL ON PLANTS or ANIMALS: Large releases may have adverse effects on plant and animal life. EFFECT OF CHEMICAL ON AQUATIC LIFE: This product may adversely affect aquatic life if released into an aquatic environment. If high concentrations of the product are released to an aquatic environment, death of fish, animals, and invertebrates may occur.
15. REGULATORY INFORMATION ADDITIONAL UNITED STATES REGULATIONS: U.S. SARA 302 and 304 REPORTING REQUIREMENTS: Components of this product are subject to the reporting requirements of Sections 302 and 304 of Title III of the Superfund Amendments and Reauthorization Act, as follows: CHEMICAL NAME SARA 302 (40 CFR 355, Appendix A) SARA 304 (40 CFR Table 302.4) Hydrogen Sulfide Yes Yes U.S. SARA THRESHOLD PLANNING QUANTITY: Hydrogen Sulfide = 500 lb (226 kg). The default Federal MSDS submission and inventory requirement filing threshold of 10,000 lb (4,540 kg) may apply to this product, per 40 CFR 370.20. U.S. SARA SECTIONS 311/312 HAZARDOUS CHEMICAL REPORTING: This product has requirements of hazardous chemical reporting, as per 40 CFR, Part 370: IMMEDIATE HEALTH (Acute Health Hazard) DELAYED HEALTH (Chronic Health Hazard) FIRE SUDDEN RELEASE REACTIVE Yes Yes (fumes) No No No U.S. SARA SECTION 313 HAZARDOUS CHEMICAL REPORTING: The Hydrogen Sulfide component of this product has reporting requirements under Section 313; however, these requirements are currently under an administrative stay. U.S. TSCA INVENTORY STATUS: The components of this product listed by CAS number in Section 2 (Composition and Information on ingredients) are listed on the TSCA Inventory. U.S. CERCLA REPORTABLE QUANTITY (RQ): Hydrogen Sulfide= 100 lb (45.4 kg)
