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Section 1. Identification

Product identifier

Durabak M26 (Military, smooth)

Other means of identification

Durabak M26; military smooth coating

Note on chemistry

M26 uses MDI (aromatic isocyanate) chemistry and is

the aromatic mil-spec grade meeting MIL-PRF-32171B revision B. For UV-exposed applications requiring aliphatic/non-yellowing chemistry, see Durabak-18 (IPDI grade).

Recommended use

Moisture-cured, single-component polyurethane protective

coating for military and defense applications. Meets MIL-PRF-32171B revision B. Qualified under MIL-PRF-32171B and NAVSEA Std Item 009-32. Suitable as a truck bed liner, deck coating, and protective surface coating. Smooth (non-textured) finish.

Uses advised against

Industrial and consumer protective coating only.

Follow label and this SDS. Not for permanent exterior UV exposure (ambers and fades; use MDI-compatible topcoat or Durabak-18 IPDI grade for UV-exposed surfaces).

Supplier (manufacturer/importer): Durabak Bergenfield, NJ 07621, USA

Telephone: 303-690-7190

Web: durabakcompany.com

Emergency telephone

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

Section 2. Hazard(s) Identification

2.1 GHS Classification (OSHA 29 CFR 1910.1200 / GHS Rev 7)

• Flammable Liquids - Category 3 (H226)
• Skin Irritation - Category 2 (H315)
• Skin Sensitization - Category 1 (H317, from MDI - isocyanate)
• Eye Irritation - Category 2 (H319)
• Acute Toxicity (inhalation/dermal) - Category 4 (H312, H332)
• Respiratory Sensitization - Category 1 (H334)
• Specific Target Organ Toxicity, Single Exposure (Respiratory Tract Irritation) - Category 3 (H335)
• Carcinogenicity - Category 2 (H351)
• Specific Target Organ Toxicity, Repeated Exposure (inhalation) - Category 2 (H373)

Signal word: WARNING

Pictograms:

• GHS02 (Flame)
• GHS07 (Exclamation mark)
• GHS08 (Health hazard)

2.2 Hazard Statements

Code	Statement
H226	Flammable liquid and vapour
H312	Harmful in contact with skin
H315	Causes skin irritation
H319	Causes serious eye irritation
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
H351	Suspected of causing cancer
H373	May cause damage to organs through prolonged or repeated inhalation exposure

2.3 Precautionary Statements

Code	Statement
P210	Keep away from heat, sparks, open flames, hot surfaces. No smoking.
P280	Wear protective gloves, protective clothing, eye protection, 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.

2.4 Label Special Provisions

Contains isocyanates. May produce an allergic reaction. Hazard-determining component(s) for labelling: Xylene (mixed isomers).

2.5 Other Hazards

No specific dangers known, if the regulations/notes for storage and handling are considered.

Note on MDI respiratory sensitization

MDI (diphenylmethane diisocyanate)

is a respiratory sensitizer. Once sensitized, subsequent low-level exposures may trigger asthmatic reactions. Respiratory protection is essential during spray application and in poorly ventilated spaces. See Section 8.

Section 3. Composition/Information on Ingredients

Substance/Mixture: Mixture

Chemical nature: Single-component moisture-cured polyurethane coating with aromatic isocyanate curative. Balance is proprietary polyurethane resin and pigments (non-hazardous or below regulatory cut-off thresholds).

Chemical Name	CAS No.	EINECS No.	Concentration (% by mass)	Classification (GHS/CLP)
Xylene, mixed isomers	1330-20-7	215-535-7	20 - 30%	H226, H312 + H332, H315
Ethylbenzene	100-41-4	202-849-4	5 - 10%	H226, H332, H351, H373
4,4'-Diphenylmethane diisocyanate (MDI)	101-68-8	202-966-0	< 5.3%	H315, H319, H332, H334, H335, H351, H373

Balance: proprietary polyurethane resin, pigments, and additives. Components below disclosure cut-off thresholds or classified non-hazardous under 1910.1200 are not listed.

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 sensitiser with accumulative effects. Risk of dermatitis. May cause lung damage if swallowed.

4.3 Indication of any immediate medical attention and special treatment needed

MDI is a respiratory sensitizer; sensitized individuals may react to extremely low subsequent concentrations. Inform treating physician of MDI content. No data available on specific antidotes; treat symptomatically.

Section 5. Fire-Fighting Measures

5.1 Extinguishing media

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

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

5.2 Special hazards arising from the substance or mixture

Flammable with toxic fumes.

5.3 Advice for fire-fighters

Wear protective equipment and respirators. Blown or distorted containers should be handled with extreme caution.

Flash point: 27 degrees C (80.6 F), ASTM D56

Section 6. Accidental Release Measures

6.1 Personal precautions, protective equipment, and emergency procedures

Wear protective equipment. Keep unprotected persons away.

6.2 Environmental precautions

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

6.3 Methods and materials for containment and cleaning up

Ensure adequate ventilation. Hazardous in liquid state. Solidify by reaction with water before disposal.

Section 7. Handling and Storage

7.1 Precautions for safe handling

Flammable. No open flames. No smoking. Open with care. Cover lid/bung with a cloth while releasing pressure. Generates carbon dioxide gas from reaction with water. Do not seal if contaminated with water due to danger of bursting.

7.2 Conditions for safe storage, including any incompatibilities

Store separately from any reactive substances, especially oxidisers. Keep containers tightly sealed. Adequate ventilation required. Recommended storage temperature: 32-104 F (0-40 C). Shelf life: 12 months unopened when stored per these conditions.

Section 8. Exposure Controls/Personal Protection

8.1 Occupational Exposure Limits

Component	CAS No.	Jurisdiction	TWA	STEL / Ceiling
Xylene, mixed isomers	1330-20-7	OSHA PEL	100 ppm (435 mg/m3) TWA	--
Xylene, mixed isomers	1330-20-7	ACGIH TLV	100 ppm TWA	150 ppm STEL
Xylene, mixed isomers	1330-20-7	EU IOELV	50 ppm (221 mg/m3) TWA	100 ppm (442 mg/m3) STEL
Ethylbenzene	100-41-4	OSHA PEL	100 ppm (435 mg/m3) TWA	--
Ethylbenzene	100-41-4	ACGIH TLV	20 ppm TWA	--
4,4'-MDI (diphenylmethane diisocyanate)	101-68-8	OSHA PEL	none established	--
4,4'-MDI (diphenylmethane diisocyanate)	101-68-8	ACGIH TLV	0.005 ppm (0.051 mg/m3) TWA	--
4,4'-MDI (diphenylmethane diisocyanate)	101-68-8	NIOSH REL	0.005 ppm TWA	0.020 ppm ceiling
4,4'-MDI (diphenylmethane diisocyanate)	101-68-8	EU IOELV	0.005 ppm (0.02 mg/m3) TWA	0.01 ppm (0.07 mg/m3) STEL

Note: MDI threshold is extremely low (0.005 ppm TWA); respiratory sensitization is a primary concern. The ACGIH TLV for xylene (100 ppm TWA) aligns with the OSHA PEL; the EU IOELV (50 ppm) is more protective.

8.2 Engineering Controls

Adequate ventilation required. Use local exhaust ventilation during spray application. Where ventilation is insufficient to maintain exposures below OELs, respiratory protection is mandatory. For military/enclosed applications, ensure forced-air ventilation per MIL-PRF-32171B.

8.3 Personal Protective Equipment (PPE)

Respiratory protection: Cartridge-type respirator with organic-fumes cartridge is essential for spraying and for use in areas with inadequate ventilation. For MDI sensitization risk, an air-purifying respirator with an isocyanate-specific cartridge (or supplied-air respirator) is recommended during spray application.

Eye/face protection: Tightly sealed goggles or face shield.

Hand protection: Nitrile rubber gloves.

Skin/body protection: Overalls and safety boots.

Section 9. Physical and Chemical Properties

Property	Value
Physical state	Liquid
Color	Various (product available in multiple colors)
Odor	Sweetish, mild solvent odor
Odor threshold	No data available
pH	8.0
Melting point / freezing point	< -46 degrees C
Boiling point / boiling range	140 degrees C
Flash point	27 degrees C (80.6 F), ASTM D56
Evaporation rate	No data available
Flammability (solid, gas)	Not applicable (liquid)
Lower/Upper flammability or explosion limits	Refer to xylene component: LEL approx 1.0% vol / UEL approx 7.0% vol
Vapor pressure	14.2 hPa at 20 degrees C
Vapor density	No data available
Relative density	1.03 g/cm3 at 20 degrees C (water = 1.00)
Solubility	Not miscible with water; reacts with water
Partition coefficient (n-octanol/water)	No data available
Auto-ignition temperature	> 200 degrees C
Decomposition temperature	200 degrees C
Viscosity	Dynamic at 20 degrees C: 80 - 110 KU (Krebs units) (uncured liquid)
VOC content	250 g/L (2.08 lb/gal) (per Navy ASTM F-718)
Solids content	66% by weight / 75.8% by volume (source: current Durabak Company datasheet)
Organic solvents	< 24.75% by mass
Water content	< 0.1% by mass

Section 10. Stability and Reactivity

10.1 Reactivity

Reacts with water.

10.2 Chemical stability

Thermal decomposition / conditions to be avoided: Could produce static discharge - use earthing. Stable if stored under normal conditions.

10.3 Possibility of hazardous reactions

Stable if stored under normal conditions.

10.4 Conditions to avoid

When exposed to abnormally high temperatures, containers will bulge and possibly burst. Avoid contact with moisture/water in sealed containers (generates CO2; burst risk). Avoid ignition sources; keep away from heat, sparks, and open flames.

10.5 Incompatible materials

Oxidisers. Reacts with water, generating carbon dioxide gas.

10.6 Hazardous decomposition products

Carbon monoxide, carbon dioxide, oxides of nitrogen, and smoke may be produced.

Section 11. Toxicological Information

11.1 Routes of Exposure

Inhalation, skin contact, eye contact, ingestion.

11.2 Acute Toxicity

Component	Route	Value
Xylene (CAS 1330-20-7)	Oral LD50	4300 mg/kg (rat)
Xylene (CAS 1330-20-7)	Dermal LD50	> 1700 mg/kg (rabbit)
Xylene (CAS 1330-20-7)	Inhalation LC50	27.6 mg/L / 4 hours (rat)
MDI (CAS 101-68-8)	Oral LD50	9200 mg/kg (rat)
MDI (CAS 101-68-8)	Dermal LD50	> 5000 mg/kg (rabbit)
MDI (CAS 101-68-8)	Inhalation LC50	0.49 mg/L / 4 hours (rat)

11.3 Skin Corrosion/Irritation

Xylene: practically non-irritating with brief contact; prolonged skin contact may defat skin, causing dermatitis.

MDI: slight to moderate irritation; may stain skin.

11.4 Serious Eye Damage/Irritation

Xylene: irritant.

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

11.5 Respiratory or Skin Sensitization

Skin and inhalation sensitiser. MDI: respiratory sensitization may occur; chronic inhalation exposure may result in a permanent decrease in lung function; may cause sensitization by skin contact. Prolonged xylene skin contact may cause dermatitis; prolonged xylene inhalation may cause CNS disturbances.

11.6 Germ Cell Mutagenicity

No data available.

11.7 Carcinogenicity

No carcinogenic, mutagenic, or genetic effects have been established for the mixture. Note: MDI (CAS 101-68-8) carries H351 (Suspected of causing cancer) per the individual component hazard classification listed in Section 16.

11.8 Reproductive Toxicity

No data available.

11.9 Specific Target Organ Toxicity - Single Exposure

H335: May cause respiratory irritation.

11.10 Specific Target Organ Toxicity - Repeated Exposure

H373: May cause damage to organs through prolonged or repeated inhalation exposure (MDI component).

11.11 Aspiration Hazard

No data available.

11.12 Additional Notes

Inhalation sensitiser with accumulative effects. Risk of dermatitis. May cause lung damage if swallowed.

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.

12.2 Persistence and degradability

Biodegradable. Once solidified, can be disposed of in landfill sites.

12.3 Bioaccumulative potential

Not bioaccumulative.

12.4 Mobility in soil

Low mobility in soil 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

Hazardous in liquid state. Solidify by reaction with water before disposal. Danger of bursting - do not seal. Use reputable waste disposal contractors. Destroy used containers. Consult local official regulations.

European waste catalogue codes (reference): 08 00 00, 08 01 00, 08 01 11 (waste paint and varnish containing organic solvents or other dangerous substances).

Uncleaned packaging: leave container unsealed for 3 to 4 days to solidify from atmospheric moisture, then dispose in landfill.

US disposal: Waste product may be regulated as a hazardous waste under RCRA 40 CFR 261 (flammable, solvent-bearing). 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.

Section 14. Transport Information

14.1 UN number

UN 1263

14.2 UN proper shipping name

PAINT

14.3 Transport hazard class(es)

• ADR: Class 3 (Flammable Liquids), Danger code (Kemler) 30, EA code 127, HAZCHEM code 3(Y)
• IMDG: Class 3 (Flammable Liquids), EMS F-E~S-E
• IATA: Class 3 (Flammable Liquids)
• IMO class: 3

14.4 Packing group

III

14.5 Environmental hazards

Marine pollutant: ND (Not Dangerous)

14.6 Special precautions for user

Keep away from ignition sources during transport. Protect containers from physical damage.

14.7 Additional information

For ADR and IMDG: transport and packing are in accordance with the regulation for limited quantities (ADR LQ: 1 L and 4 L; transport category 3). Product is therefore non-dangerous goods when shipped as limited quantities.

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 US Federal

TSCA (Toxic Substances Control Act, 15 USC 2601): All components are active or exempt on the US TSCA Inventory. TSCA 8(a) PAIR and 8(c) SAR records apply to MDI.

SARA Title III (EPCRA):

• Section 302/304 Extremely Hazardous Substances: No extremely hazardous substances present; reportable quantity not applicable.
• Section 311/312 Hazard categories: Flammable liquid; Acute health hazard (skin/respiratory irritation, sensitization); Chronic health hazard (repeated exposure organ toxicity, suspected carcinogen).
• Section 313 Toxic Release Inventory: Ethylbenzene (CAS 100-41-4) and xylene (mixed isomers, CAS 1330-20-7) are listed toxic chemicals subject to supplier notification under 40 CFR 372.

Clean Air Act Section 112(b) HAPs: Xylene and ethylbenzene are listed hazardous air pollutants.

Clean Water Act: Ethylbenzene is a Section 307 priority pollutant. Xylene and ethylbenzene are Section 311 hazardous substances.

CERCLA/Superfund: Xylene and ethylbenzene are CERCLA hazardous substances; reportable quantities apply per 40 CFR 302.4.

15.2 California

Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986):

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.

15.3 State Right-to-Know

The following components are listed under the right-to-know regulations of Massachusetts, New Jersey, New York, and Pennsylvania: xylene (mixed isomers, CAS 1330-20-7), ethylbenzene (CAS 100-41-4), and MDI / diphenylmethane diisocyanate (CAS 101-68-8).

15.4 International Inventories

All components of this product are listed or exempt on the following inventories: Australia (AICS), Canada (DSL), China (IECSC), Japan (CSCL), Republic of Korea (KECI), New Zealand (NZIoC), Philippines (PICCS), Taiwan (TCSI), EU/Eurasian (Russia) (EAEU), and Vietnam (VCHEMIS). United States: all components are active or exempt on the TSCA Inventory (see US Federal above).

15.5 VOC Compliance

VOC content: 250 g/L (2.08 lb/gal) as applied. Category: Architectural and Industrial Maintenance (AIM) coating, Industrial Maintenance subcategory.

Regulatory Authority	Limit (AIM/IM)	Compliance
US EPA / Federal AIM Rule	450 g/L	Complies
CARB / OTC Model Rule (statewide)	250 g/L	Complies (at limit)
SCAQMD Rule 1113 (Greater Los Angeles)	100 g/L	DOES NOT COMPLY

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.

Section 16. Other Information

Revision date: 2026-06-18

Version: 1.0

Full Hazard Statement Abbreviation Key (GHS Rev 7)

Code	Full Statement
H226	Flammable liquid and vapour
H312	Harmful in contact with skin
H315	Causes skin irritation
H319	Causes serious eye irritation
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
H351	Suspected of causing cancer
H373	May cause damage to organs through prolonged or repeated inhalation exposure

Key Safety Notices

CONTAINS ISOCYANATE - POTENTIAL SENSITISER - 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.

Notes on This Document

This SDS is the sole M26 Military SDS (MDI/aromatic chemistry). The M26 designation reflects the MIL-PRF-32171B revision B application. M26 uses aromatic MDI chemistry; the aliphatic/UV-stable grade is Durabak-18.

Refer to xylene CAS 1330-20-7 for explosion-limit ranges (approx LEL 1.0% / UEL 7.0% by volume).

Disclaimer

Information presented in good faith and believed to be correct at date of preparation. Users are responsible for verifying current status and suitability for their application. The manufacturer expressly disclaims liability for any and all losses, damages, and/or expenses arising out of storage, handling, use, or disposal of the product.