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Section 1. Identification

1.1 Product identifier

Product name: Durabak-18 Outdoor / UV

Other identifiers: Durabak-18 (all finishes: Textured, Smooth, White, Marine, RV Roof, Clear Coat)

1.2 Relevant identified uses and uses advised against

Recommended use: Protective polyurethane coating; truck bed liner; deck and marine coating; recreational vehicle (RV) roof coating. For industrial and consumer protective coating applications; follow label directions and this SDS.

Uses advised against: Do not use for interior/non-UV applications where the MDI indoor product is suitable. Not for use on glass, marble, polished stone, or surfaces that cannot be mechanically abraded.

1.3 Details of the supplier of the safety data sheet

Durabak Bergenfield, NJ 07621, USA

Telephone: 303-690-7190

Web: durabakcompany.com

1.4 Emergency telephone number

Emergency: 1-800-222-1222 (Poison Help - US national poison control hotline)

Section 2. Hazard(s) Identification

2.1 Classification of the substance or mixture (GHS / OSHA 29 CFR 1910.1200)

Hazard class	Category	H-statement
Flammable Liquids	Category 3	H226
Skin Irritation	Category 2	H315
Environment	Not classified	-

2.2 GHS label elements

Signal word: WARNING

Pictograms: GHS02 (Flame) | GHS07 (Exclamation mark)

Hazard statements:

• H226 Flammable liquid and vapour.
• H315 Causes skin irritation.

Precautionary statements:

• P210 Keep away from heat, sparks, open flames, hot surfaces. No smoking.
• P280 Wear protective gloves, protective clothing, eye protection, and face protection.
• P284 In case of inadequate ventilation, wear respiratory protection.
• P302 + P352 IF ON SKIN: Wash with plenty of soap and water.
• P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do; continue rinsing.
• P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
• P501 Dispose of contents/container to landfill site after solidification.

Label special note: Contains isocyanates. May produce an allergic reaction.

Hazard-determining component for labelling: Xylene (mixed isomers). Percentage of mixture consisting of ingredient(s) of unknown hazards to the aquatic environment: less than 5%.

2.3 Other hazards

No specific dangers known if the regulations and notes for storage and handling are observed.

Note for spray application: IPDI (isophorone diisocyanate) is a respiratory sensitizer at higher exposure concentrations. Although present at 0.1-1.0% in this formulation (below the H334 GHS cut-off for mixture classification), spray mist can generate elevated vapor/aerosol concentrations. Use supplied-air or cartridge respirator (organic-vapor + P100 particulate cartridge) for all spray operations. Once sensitized, re-exposure at any level can trigger a reaction.

Section 3. Composition / Information on Ingredients

Substance / mixture: Mixture

Type: One-part (single-pack) moisture-cured polyurethane coating

Hazardous components required to be disclosed:

Chemical name	CAS No.	EINECS	Concentration (% by mass)	GHS classification
Xylene, mixed isomers	1330-20-7	215-535-7	20 - 30%	H226, H312, H315, H332
Ethylbenzene	100-41-4	202-849-4	5 - 10%	H225, H304, H332, H373
Isophorone diisocyanate (IPDI)	4098-71-9	223-861-6	0.1 - 1.0%	H315, H317, H319, H331, H334, H335, H411

Balance: Proprietary polyurethane resin, pigments, and additives - non-hazardous or present below GHS disclosure cut-off thresholds.

Note: Ethylbenzene is a constituent of the aromatic (xylene) solvent fraction and is disclosed separately per GHS cut-off thresholds.

Note: The full H-statement set for IPDI (including H334 - respiratory sensitizer) applies to the pure substance. The mixture classification for respiratory sensitization is not triggered at 0.1-1.0% IPDI concentration; see Section 2.3 for spray-use caution.

Section 4. First-Aid Measures

4.1 Description of first-aid measures

Inhalation: Move to fresh air. In case of any discomfort, seek medical attention immediately.

Skin contact: Use hand cleaner/soap and water. Remove contaminated clothing. If skin irritation continues, consult a doctor.

Eye contact: Rinse opened eye for several minutes under running water. If symptoms persist, consult a doctor.

Ingestion: Do not induce vomiting. Seek immediate medical attention.

4.2 Most important symptoms and effects, both acute and delayed

Inhalation sensitizer with accumulative effects. Risk of dermatitis (skin).

May cause lung damage if swallowed. IPDI: respiratory sensitization may occur; chronic inhalation exposure may result in permanent decrease of lung function. Contains isocyanate - potential sensitizer; once sensitized, reactions can occur at very low concentrations.

4.3 Indication of immediate medical attention and special treatment needed

In all cases of significant inhalation exposure or respiratory symptoms, seek prompt medical evaluation. Inform treating physician that the product contains an isocyanate (IPDI) and xylene. No data available on specific antidotes.

Section 5. Fire-Fighting Measures

5.1 Extinguishing media

Suitable: Foam, carbon dioxide, dry powder, water fog to cool and control.

Unsuitable: Do NOT use water jets. Containers can become pressurized if contents are contaminated with water.

5.2 Special hazards arising from the substance or mixture

Flammable with toxic fumes. Flash point 27 C (80.6 F); classified Flammable Liquid Category 3.

5.3 Advice for fire-fighters

Wear full protective equipment and self-contained breathing apparatus (SCBA). Blown or distorted containers should be handled with extreme caution (burst risk if heated or water-contaminated).

Section 6. Accidental Release Measures

6.1 Personal precautions, protective equipment and emergency procedures

Wear protective equipment (see Section 8). Keep unprotected persons away. Eliminate ignition sources. Provide adequate ventilation.

6.2 Environmental precautions

Do not allow to enter drains, sewers, surface water, or ground water.

6.3 Methods and material for containment and cleaning up

Ensure adequate ventilation. Product is hazardous in liquid state. Solidify by reaction with water before disposal. Contain spill; absorb with inert material (sand, earth). Collect in suitable containers for disposal per Section 13.

6.4 Reference to other sections

See Section 8 (PPE) and Section 13 (Disposal).

Section 7. Handling and Storage

7.1 Precautions for safe handling

Flammable - no open flames, no smoking. Open containers with care. Cover lid/bung with a cloth while releasing pressure. Product generates carbon dioxide gas from reaction with water. Do not seal containers that are contaminated with water - danger of bursting. Stir thoroughly before use; do not shake (entrains moisture and air). Reseal can immediately after use. Use with adequate ventilation; wear respiratory protection for spray application (see Section 8).

7.2 Conditions for safe storage, including any incompatibilities

Store separately from reactive substances, especially oxidizers. Keep containers tightly sealed. Store at 32-104 F (0-40 C) in a well-ventilated location away from heat and ignition sources. Shelf life: 12 months unopened.

7.3 Specific end uses

Protective polyurethane coating; truck bed liner; deck, marine, and RV roof coating. See Section 1.2.

Section 8. Exposure Controls / Personal Protection

8.1 Control parameters (Occupational Exposure Limits)

Component	CAS	OEL type	Value
Xylene, mixed isomers	1330-20-7	OSHA PEL TWA	100 ppm (435 mg/m3)
Xylene, mixed isomers	1330-20-7	ACGIH TLV-TWA	100 ppm
Xylene, mixed isomers	1330-20-7	ACGIH TLV-STEL	150 ppm
Xylene, mixed isomers	1330-20-7	IOELV TWA (8 h)	50 ppm (221 mg/m3)
Xylene, mixed isomers	1330-20-7	IOELV STEL (15 min)	100 ppm (442 mg/m3)
Xylene, mixed isomers	1330-20-7	Germany MAK TWA	100 ml/m3
Xylene, mixed isomers	1330-20-7	UK WEL 8 hr TWA	220 mg/m3
Xylene, mixed isomers	1330-20-7	UK WEL STEL (15 min)	441 mg/m3
Ethylbenzene	100-41-4	OSHA PEL TWA	100 ppm (435 mg/m3)
Ethylbenzene	100-41-4	ACGIH TLV-TWA	20 ppm
IPDI (Isophorone diisocyanate)	4098-71-9	OSHA PEL	None established
IPDI (Isophorone diisocyanate)	4098-71-9	ACGIH TLV-TWA	0.005 ppm
IPDI (Isophorone diisocyanate)	4098-71-9	Germany MAK TWA	0.005 ml/m3
IPDI (Isophorone diisocyanate)	4098-71-9	UK WEL 8 hr TWA	0.02 mg/m3
IPDI (Isophorone diisocyanate)	4098-71-9	UK WEL STEL (15 min)	0.07 mg/m3
IPDI (Isophorone diisocyanate)	4098-71-9	IOELV	Not established

8.2 Engineering controls

Provide adequate local exhaust ventilation. For spray application, use a dedicated spray booth with exhaust ventilation maintaining airborne concentrations below OELs. For brush/roller application, ensure cross- ventilation or local exhaust.

8.3 Individual protection measures / personal protective equipment

Respiratory protection: For brush/roller use with good ventilation, an organic-vapor cartridge respirator (NIOSH-approved, OV/P100) is recommended. For spray application, a supplied-air respirator or a full-face organic-vapor plus P100 particulate respirator is required. IPDI is a respiratory sensitizer; do not rely on ventilation alone during spraying.

Eye protection: Tightly sealed chemical splash goggles or full-face shield.

Hand protection: Nitrile rubber gloves (minimum 0.2 mm thickness); replace immediately if punctured or if product contacts the interior.

Skin / body protection: Coveralls and safety boots; avoid prolonged skin contact.

Hygiene: Wash hands, forearms, and face thoroughly after handling and before eating, drinking, or using toilet facilities. Remove and wash contaminated clothing before reuse.

Section 9. Physical and Chemical Properties

Property	Value
Physical state	Liquid
Color	Various (multiple pigmented grades)
Odor	Sweetish (mild solvent)
Odor threshold	No data available
pH	8.0
Melting point / freezing point	< -46 C (< -50.8 F)
Boiling point (initial)	140 C (284 F)
Flash point	27 C (80.6 F) - closed cup (ASTM D56)
Evaporation rate	Not determined
Flammability (solid/gas)	Not applicable (liquid)
Lower flammability / explosion limit	Refer to xylene: approx. 1.0% by volume (LEL)
Upper flammability / explosion limit	Refer to xylene: approx. 7.0% by volume (UEL)
Vapor pressure	14.2 hPa at 20 C (68 F)
Vapor density	Not determined
Relative density (water = 1.00)	0.985 at 20 C (68 F)
Density	0.985 g/cm3 at 20 C
Solubility in water	Not miscible; reacts with water
Partition coefficient (n-octanol/water)	Not determined
Auto-ignition temperature	> 200 C (> 392 F)
Decomposition temperature	200 C (392 F)
Viscosity (dynamic, 20 C)	80 - 110 KU (Krebs units)
VOC (EU)	<= 250 g/L
VOC (% by volume)	<= 29.0% by volume
Solids content	66% by weight / 75.8% by volume
Organic solvent content	< 24.75% by mass
Water content	< 0.1% by mass

Section 10. Stability and Reactivity

10.1 Reactivity

Reacts with water. One-part moisture-cure product: reaction with atmospheric moisture is the intended cure mechanism and generates carbon dioxide (CO2) gas. Sealed, water-contaminated containers may burst.

10.2 Chemical stability

Stable if stored under normal conditions (see Section 7). Could produce static discharge when transferring - use earthing/bonding for metallic containers.

10.3 Possibility of hazardous reactions

Stable if stored under normal conditions. Flammable vapors may accumulate in poorly ventilated spaces.

10.4 Conditions to avoid

Abnormally high temperatures; exposure to heat, ignition sources, open flames. Containers will bulge and possibly burst when exposed to abnormally high temperatures or if sealed while water-contaminated.

10.5 Incompatible materials

Oxidizers. Water (generates CO2 gas; do not seal water-contaminated containers).

10.6 Hazardous decomposition products

Carbon monoxide, carbon dioxide, oxides of nitrogen, and smoke (on combustion or at temperatures above 200 C).

Section 11. Toxicological Information

11.1 Information on toxicological effects

Acute toxicity:

Xylene (CAS 1330-20-7):

• Oral LD50: 4300 mg/kg (rat)
• Dermal LD50: > 1700 mg/kg (rabbit)
• Inhalation LC50: 27.6 mg/L / 4 hours (rat)

IPDI - Isophorone diisocyanate (CAS 4098-71-9):

• Oral LD50: 5490 mg/kg (rat)
• Dermal LD50: 4780 mg/kg (rabbit)
• Inhalation LC50: 40 mg/m3 / 4 hours (rat)

Skin corrosion / irritation:

Xylene: practically non-irritating to skin with brief contact; prolonged contact may cause dermatitis.

IPDI: slight to moderate irritation; may stain skin.

Serious eye damage / eye irritation:

Xylene: irritant.

IPDI: moderate eye irritation; may cause transient corneal damage.

Respiratory or skin sensitization: Product is a skin and inhalation sensitizer. IPDI: respiratory sensitization may occur with inhalation exposure; chronic inhalation may result in permanent decrease of lung function. May cause sensitization by skin contact. Contains isocyanate - potential sensitizer; once sensitized, reactions can occur at any concentration.

Germ cell mutagenicity: No carcinogenic, mutagenic, or genetic effects have been established for the components at concentrations present in this mixture.

Carcinogenicity: No carcinogenic effects established for the components at concentrations present in this mixture.

Reproductive toxicity: No data available.

STOT - single exposure: Inhalation of vapors/mists may cause respiratory irritation.

STOT - repeated exposure: Chronic xylene inhalation: possible effects on central nervous system. IPDI: chronic inhalation may result in permanent decrease of lung function.

Aspiration hazard: May cause lung damage if swallowed (based on hydrocarbon solvent content).

Section 12. Ecological Information

12.1 Ecotoxicity

None of the components is persistent in the aquatic environment. Considered harmful to terrestrial vertebrates. May have short-term environmental effects.

Aquatic toxicity: no data available on the mixture as a whole.

12.2 Persistence and degradability

Biodegradable. Once solidified by reaction with moisture, product can be disposed of in landfill sites.

12.3 Bioaccumulative potential

Not bioaccumulative.

12.4 Mobility in soil

Low mobility due to solidification by reaction with water.

12.5 Results of PBT and vPvB assessment

Not applicable.

12.6 Other adverse effects

No data available.

Section 13. Disposal Considerations

13.1 Waste treatment methods

Product is hazardous in liquid state. Solidify by reaction with water before disposal. Danger of bursting if sealed during solidification - do not seal containers while solidifying. Use reputable waste disposal contractors. Destroy used/empty containers. Consult local and federal regulations before disposal.

Uncleaned packaging: leave container unsealed for 3 to 4 days to allow solidification from atmospheric moisture, then dispose of in a licensed landfill site in accordance with local regulations.

European waste codes (reference): 08 00 00 / 08 01 00 / 08 01 11.

If discarded as supplied (unused), this product exhibits the RCRA characteristic of ignitability, waste code D001 (flash point <60 C / 140 F, per 40 CFR 261.21). Unused xylene-bearing waste may also carry listed code U239 (xylene). Confirm the codes for your actual waste stream.

Consult local and state-specific hazardous waste requirements with a qualified waste management contractor.

Section 14. Transport Information

14.1 UN number

UN 1263

14.2 UN proper shipping name

PAINT

14.3 Transport hazard class(es)

Class 3 - Flammable Liquids (DOT, ADR, IMDG, IATA)

14.4 Packing group

Packing Group III

14.5 Environmental hazards

Marine pollutant: No (Not Dangerous)

14.6 Special precautions for user

Mode	Regulation	Details
Road (DOT / ADR)	ADR	UN 1263 PAINT, Class 3, PG III; Danger code (Kemler): 30
Sea (IMDG)	IMDG Code	UN 1263 PAINT, Class 3, PG III; EMS: F-E, S-E; IMO class 3
Air (IATA)	IATA DGR	UN 1263 PAINT, Class 3, PG III
ADR Limited Quantities	LQ7	5 L per inner package; transport category 3

EA code: 127. HAZCHEM code: 3 (Y).

14.7 Transport in bulk

Not applicable (packaged goods only).

US DOT (49 CFR): UN1263, PAINT, Class 3, Packing Group III. Limited quantity = inner packagings not exceeding 5 L (1.3 gal) per 49 CFR 173.150; consumer-quantity reliefs may apply to retail quart/gallon packaging.

Section 15. Regulatory Information

15.1 Safety, health, and environmental regulations specific to the substance or mixture

United States - Federal:

• OSHA: This SDS is prepared in accordance with 29 CFR 1910.1200 (Hazard Communication Standard).
• TSCA (Toxic Substances Control Act): All components are active or exempt on the US TSCA Inventory.
• Clean Air Act Section 112(b) HAPs: Xylene and ethylbenzene are listed hazardous air pollutants under the Clean Air Act.
• Clean Water Act: Ethylbenzene is a Section 307 priority pollutant. Xylene and ethylbenzene are Section 311 hazardous substances.
• SARA Title III, Section 302/304 (Extremely Hazardous Substances): No extremely hazardous substances present; reportable quantity not applicable.
• SARA Title III, Section 313 (Emergency Planning and Community Right-to-Know Act): Ethylbenzene (CAS 100-41-4) and xylene (CAS 1330-20-7) are listed toxic chemicals subject to supplier notification. TRI reporting may apply to facilities above threshold quantities.
• CERCLA / SUPERFUND: No data available on CERCLA reportable quantities for components as formulated.

United States - California:

• Proposition 65: WARNING: This product can expose you to ethylbenzene, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
• VOC compliance: Sold in California. CARB SCM-compliant as an Industrial Maintenance coating at <=250 g/L VOC. NOT available in the SCAQMD (greater Los Angeles) district or other air districts that enforce a 100 g/L Industrial Maintenance limit.

United States - State Right-to-Know:

• Xylene and ethylbenzene are listed under the Massachusetts, New Jersey, New York, and Pennsylvania Right-to-Know hazardous substance lists.
• Isophorone diisocyanate (IPDI, 4098-71-9) is listed on the New Jersey and Pennsylvania Right-to-Know hazardous substance lists (and the Massachusetts substance list).

International - Inventory Status:

• All components are listed on or exempt from the following national chemical inventories: Australia (AIIC), Canada (DSL), China (IECSC), Japan CSCL, Republic of Korea (KECI), New Zealand (NZIoC), Philippines (PICCS), Taiwan (TCSI), EU/Eurasian (EAEU/Russia), and Vietnam (VCSPL). United States: all components are active or exempt on the TSCA Inventory.

International:

• GHS Rev 7: This document is formatted under GHS Revision 7.

15.2 Chemical safety assessment

A Chemical Safety Assessment has not been performed for this mixture.

Section 16. Other Information

Revision information

Revision date: 2026-06-18

Version: 1.0

Key safety warnings

CONTAINS ISOCYANATE - POTENTIAL SENSITIZER - ENSURE PRECAUTIONS ARE TAKEN. PAY SPECIAL ATTENTION TO STORAGE AND HANDLING REQUIREMENTS. IN CASE OF ANY DISCOMFORT FROM CONTACT WITH THE MIXTURE, ALWAYS SEEK MEDICAL ADVICE.

H-statement legend (full, for all components including pure-substance statements)

Code	Statement
H226	Flammable liquid and vapour
H312	Harmful in contact with skin
H315	Causes skin irritation
H317	May cause an allergic skin reaction
H319	Causes serious eye irritation
H331	Toxic if inhaled
H312 + H332	Harmful in contact with skin or if inhaled
H334	May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335	May cause respiratory irritation
H411	Toxic to aquatic life with long lasting effects

Abbreviations

ACGIH: American Conference of Governmental Industrial Hygienists.

ADR: European Agreement Concerning the International Carriage of Dangerous Goods by Road.

ASTM: American Society for Testing and Materials.

CARB: California Air Resources Board.

CLP: EU Regulation 1272/2008/EC (Classification, Labelling and Packaging).

GHS: Globally Harmonized System of Classification and Labelling of Chemicals.

IATA: International Air Transport Association.

IMDG: International Maritime Dangerous Goods Code.

IOELV: Indicative Occupational Exposure Limit Value (EU).

IPDI: Isophorone Diisocyanate.

LEL: Lower Explosive Limit.

LQ: Limited Quantities.

MAK: Germany Workplace Exposure Limit (Maximale Arbeitsplatz-Konzentration).

NIOSH: National Institute for Occupational Safety and Health.

OEL: Occupational Exposure Limit.

OSHA: US Occupational Safety and Health Administration.

PBT: Persistent, Bioaccumulative, and Toxic.

PEL: Permissible Exposure Limit (OSHA).

SARA: Superfund Amendments and Reauthorization Act.

SCAQMD: South Coast Air Quality Management District.

SDS: Safety Data Sheet.

STEL: Short-Term Exposure Limit.

TLV: Threshold Limit Value (ACGIH).

TSCA: Toxic Substances Control Act (US EPA).

TWA: Time-Weighted Average.

UEL: Upper Explosive Limit. vPvB: Very Persistent, very Bioaccumulative.

WEL: UK Workplace Exposure Limit.

Disclaimer

Information provided is not intended to be exhaustive. The user is responsible for verifying the currency of this data sheet prior to use and for determining suitability for a specific application. Durabak disclaims liability for adverse events arising from the handling, storage, application, use, misuse, or disposal of this product.