SAFETY DATA SHEET. None. None. The mixture does not meet the criteria for classification.

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1 SAFETY DATA SHEET 1. Identification Product identifier Other means of identification SKU# Recommended use Recommended restrictions Thiokol 2235M Polysulfide Joint Sealant - Hardener/Side B TK223H None known. Manufacturer/Importer/Supplier/Distributor information Manufacturer Company name ITW Engineered Polymers Address 130 Commerce Drive Montgomeryville, PA Telephone United States Customer Service (215) Website orders@itwcoatings.com Contact person EHS Department Emergency phone number CHEMTREC (800) International (703) Hazard(s) identification Physical hazards Health hazards Environmental hazards OSHA defined hazards Label elements Hazard symbol Signal word Hazard statement Precautionary statement Prevention Response Storage Disposal Hazard(s) not otherwise classified (HNOC) Supplemental information None. None. The mixture does not meet the criteria for classification. Observe good industrial hygiene practices. Wash hands after handling. Store away from incompatible materials. Dispose of waste and residues in accordance with local authority requirements. None known. Not applicable. 3. Composition/information on ingredients Mixtures Chemical name Common name and synonyms CAS number % Manganese Oxide Tetramethyl Thiuram Disulfide (TMTD) Other components below reportable levels > 30 *Designates that a specific chemical identity and/or percentage of composition has been withheld as a trade secret First-aid measures Inhalation Move to fresh air. Call a physician if symptoms develop or persist. 1 / 7

2 Skin contact Eye contact Ingestion Most important symptoms/effects, acute and delayed Indication of immediate medical attention and special treatment needed General information 5. Fire-fighting measures Suitable extinguishing media Unsuitable extinguishing media Specific hazards arising from the chemical Special protective equipment and precautions for firefighters Fire-fighting equipment/instructions General fire hazards Wash off with soap and water. Get medical attention if irritation develops and persists. Rinse with water. Get medical attention if irritation develops and persists. Rinse mouth. Get medical attention if symptoms occur. Direct contact with eyes may cause temporary irritation. Treat symptomatically. Ensure that medical personnel are aware of the material(s) involved, and take precautions to protect themselves. Water fog. Foam. Dry chemical powder. Carbon dioxide (CO2). Do not use water jet as an extinguisher, as this will spread the fire. During fire, gases hazardous to health may be formed. Self-contained breathing apparatus and full protective clothing must be worn in case of fire. Move containers from fire area if you can do so without risk. No unusual fire or explosion hazards noted. 6. Accidental release measures Personal precautions, protective equipment and emergency procedures Methods and materials for containment and cleaning up Keep unnecessary personnel away. Keep people away from and upwind of spill/leak. Keep out of low areas. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. For personal protection, see section 8 of the SDS. Stop the flow of material, if this is without risk. Prevent entry into waterways, sewer, basements or confined areas. Following product recovery, flush area with water. Environmental precautions 7. Handling and storage Precautions for safe handling Conditions for safe storage, including any incompatibilities Never return spills in original containers for re-use. For waste disposal, see section 13 of the SDS. Avoid discharge into drains, water courses or onto the ground. Observe good industrial hygiene practices. Store in original tightly closed container. Store away from incompatible materials (see Section 10 of the SDS). 8. Exposure controls/personal protection Occupational exposure limits US. OSHA Table Z-1 Limits for Air Contaminants (29 CFR ) Components Type Value Manganese Oxide (CAS ) Tetramethyl Thiuram Disulfide (TMTD) (CAS ) US. ACGIH Threshold Limit Values Components Ceiling PEL Type 5 mg/m3 5 mg/m3 Value Form Manganese Oxide (CAS ) Tetramethyl Thiuram Disulfide (TMTD) (CAS ) TWA 0.1 mg/m3 Inhalable fraction mg/m3 Respirable fraction. TWA 0.05 mg/m3 Inhalable fraction and vapor. 2 / 7

3 US. NIOSH: Pocket Guide to Chemical Hazards Components Type Value Form Manganese Oxide (CAS ) Tetramethyl Thiuram Disulfide (TMTD) (CAS ) Biological limit values Exposure guidelines Appropriate engineering controls STEL 3 mg/m3 Fume. TWA 1 mg/m3 Fume. TWA 5 mg/m3 No biological exposure limits noted for the ingredient(s). Occupational Exposure Limits are not relevant to the current physical form of the product. Good general ventilation (typically 10 air changes per hour) should be used. Ventilation rates should be matched to conditions. If applicable, use process enclosures, local exhaust ventilation, or other engineering controls to maintain airborne levels below recommended exposure limits. If exposure limits have not been established, maintain airborne levels to an acceptable level. Individual protection measures, such as personal protective equipment Eye/face protection If contact is likely, safety glasses with side shields are recommended. Hand protection Skin protection Other Respiratory protection Thermal hazards General hygiene considerations 9. Physical and chemical properties Appearance Odor Physical state Form Color Odor threshold ph Melting point/freezing point Initial boiling point and boiling range Flash point Evaporation rate Flammability (solid, gas) For prolonged or repeated skin contact use suitable protective gloves. Wear suitable protective clothing. In case of insufficient ventilation, wear suitable respiratory equipment. Wear appropriate thermal protective clothing, when necessary. Always observe good personal hygiene measures, such as washing after handling the material and before eating, drinking, and/or smoking. Routinely wash work clothing and protective equipment to remove contaminants. Liquid. Liquid. Liquid. Gray when mixed with Part A Slight. > F (> 93.9 C) Upper/lower flammability or explosive limits Flammability limit - lower (%) Flammability limit - upper (%) Explosive limit - lower (%) Explosive limit - upper (%) Vapor pressure Vapor density Relative density Solubility(ies) Solubility (water) Partition coefficient (n-octanol/water) Auto-ignition temperature estimated not soluble 3 / 7

4 Decomposition temperature Viscosity Other information Flammability class Specific gravity VOC (Weight %) 10. Stability and reactivity Reactivity Chemical stability Possibility of hazardous reactions Conditions to avoid Incompatible materials Hazardous decomposition products Combustible IIIB estimated 1.76 estimated 0 mixed components The product is stable and non-reactive under normal conditions of use, storage and transport. Material is stable under normal conditions. No dangerous reaction known under conditions of normal use. Contact with incompatible materials. Strong oxidizing agents. No hazardous decomposition products are known. 11. Toxicological information Information on likely routes of exposure Ingestion Inhalation Skin contact Eye contact Symptoms related to the physical, chemical and toxicological characteristics Information on toxicological effects Acute toxicity Skin corrosion/irritation Serious eye damage/eye irritation Respiratory or skin sensitization ACGIH sensitization Respiratory sensitization Skin sensitization Germ cell mutagenicity Carcinogenicity Sensitizer. No data available to indicate product or any components present at greater than 0.1% are mutagenic or genotoxic. IARC Monographs. Overall Evaluation of Carcinogenicity 3 Not classifiable as to carcinogenicity to humans. OSHA Specifically Regulated Substances (29 CFR ) Not listed. Reproductive toxicity Specific target organ toxicity - single exposure Specific target organ toxicity - repeated exposure Aspiration hazard Further information This product has no known adverse effect on human health. 12. Ecological information Ecotoxicity Not expected to be harmful to aquatic organisms. 4 / 7

5 Persistence and degradability Bioaccumulative potential Mobility in soil Other adverse effects No data is available on the degradability of this product. No data available for this product. No other adverse environmental effects (e.g. ozone depletion, photochemical ozone creation potential, endocrine disruption, global warming potential) are expected from this component. 13. Disposal considerations Disposal instructions Hazardous waste code US RCRA Hazardous Waste U List: Reference Collect and reclaim or dispose in sealed containers at licensed waste disposal site. The waste code should be assigned in discussion between the user, the producer and the waste disposal company. Waste from residues / unused products Contaminated packaging 14. Transport information DOT Not regulated as dangerous goods. IATA Not regulated as dangerous goods. IMDG Not regulated as dangerous goods. Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code U244 Dispose of in accordance with local regulations. Empty containers or liners may retain some product residues. This material and its container must be disposed of in a safe manner (see: Disposal instructions). Empty containers should be taken to an approved waste handling site for recycling or disposal. Not applicable. 15. Regulatory information US federal regulations TSCA Section 12(b) Export Notification (40 CFR 707, Subpt. D) CERCLA Hazardous Substance List (40 CFR 302.4) SARA 304 Emergency release notification Listed. Listed. OSHA Specifically Regulated Substances (29 CFR ) Not listed. US EPCRA (SARA Title III) Section Toxic Chemical: De minimis concentration % 1.0 N450 % 1.0 US EPCRA (SARA Title III) Section Toxic Chemical: Listed substance Superfund Amendments and Reauthorization Act of 1986 (SARA) Hazard categories Immediate Hazard - No Delayed Hazard - No Fire Hazard - No Pressure Hazard - No Reactivity Hazard - No SARA 302 Extremely hazardous substance Not listed. SARA 311/312 Hazardous chemical No Listed. N450 Listed. SARA 313 (TRI reporting) Chemical name CAS number % by wt. Manganese Oxide / 7

6 SARA 313 (TRI reporting) Chemical name CAS number % by wt. Tetramethyl Thiuram Disulfide (TMTD) Other federal regulations Clean Air Act (CAA) Section 112 Hazardous Air Pollutants (HAPs) List Clean Air Act (CAA) Section 112(r) Accidental Release Prevention (40 CFR ) Safe Drinking Water Act (SDWA) US state regulations US. Massachusetts RTK - Substance List US. New Jersey Worker and Community Right-to-Know Act US. Pennsylvania Worker and Community Right-to-Know Law US. Rhode Island RTK US. California Proposition 65 California Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65): This material is not known to contain any chemicals currently listed as carcinogens or reproductive toxins. International Inventories Country(s) or region Inventory name On inventory (yes/no)* Australia Australian Inventory of Chemical Substances (AICS) Canada Canada China Europe Europe Japan Korea New Zealand Philippines United States & Puerto Rico Domestic Substances List (DSL) Non-Domestic Substances List (NDSL) Inventory of Existing Chemical Substances in China (IECSC) European Inventory of Existing Commercial Chemical Substances (EINECS) European List of Notified Chemical Substances (ELINCS) Inventory of Existing and New Chemical Substances (ENCS) Existing Chemicals List (ECL) New Zealand Inventory Philippine Inventory of Chemicals and Chemical Substances (PICCS) Toxic Substances Control Act (TSCA) Inventory *A "" indicates that all components of this product comply with the inventory requirements administered by the governing country(s) A "No" indicates that one or more components of the product are not listed or exempt from listing on the inventory administered by the governing country(s). 16. Other information, including date of preparation or last revision Issue date Revision date Version # 03 HMIS ratings Health: 0 Flammability: 1 Physical hazard: 0 NFPA ratings Health: 0 Flammability: 1 Instability: 0 No No 6 / 7

7 Disclaimer Revision Information The information provided in this Safety Data Sheet is correct to the best of our knowledge, information and belief at the date of its publication. The information relates only to the specific material designated and may not be valid for such material used in combination with any other materials or in any process, unless specified in the text. The information given is designed only as a guidance for safe handling, use, processing, storage, transportation, disposal and release. Physical & Chemical Properties: Multiple Properties Regulatory Information: United States 7 / 7