MES-100 Methylated Seed Oil | Spray Adjuvant
Drexel MES-100 is a professional-grade methylated seed oil MSO spray adjuvant designed for use with many post-emergent herbicide applications. This modified vegetable oil concentrate helps support herbicide performance by improving spray coverage and leaf penetration, making it a strong choice for agricultural, turf, and vegetation-management spray programs where an MSO adjuvant is recommended.
Formulated with methylated seed oil and alkylphenol ethoxylate as 100% principal functioning agents, MES-100 can often be used in place of non-ionic surfactants or petroleum-based crop oils in approved post-emergence herbicide tank mixes. Always confirm compatibility and rate requirements on the herbicide label before use.
Key Benefits
| Feature |
Customer Benefit |
| Methylated seed oil adjuvant |
Helps improve the performance consistency of many post-emergent herbicide sprays. |
| Improves leaf penetration |
Supports movement of spray solution through waxy leaf surfaces. |
| Can replace NIS or crop oil in many mixes |
Useful when the herbicide label allows an MSO alternative. |
| 2.5-gallon jug |
Convenient size for professional and larger-area spray applications. |
| Liquid formulation |
Easy to measure, pour, and add to spray tanks. |
| Post-emergent herbicide use |
Designed for use with herbicides after weeds have emerged. |
Product Specifications
| Specification |
Details |
| Product Name |
Drexel MES-100 |
| Product Type |
Spray adjuvant / methylated seed oil concentrate |
| Container Size |
2.5 gallons / 9.46 L |
| Principal Functioning Agents |
Methylated seed oil, alkylphenol ethoxylate – 100% |
| Physical Form |
Liquid |
| Common Use |
Post-emergent herbicide tank mixes |
| Mix Order |
Add last to the spray mix unless the herbicide label gives different instructions |
| Aquatic Use |
Not for aquatic use |
| Manufacturer |
Drexel Chemical Company |
Recommended Use Rate
| Application Type |
Label Rate |
| Post-emergent herbicide applications |
1 pint to 5 quarts per acre |
| Special applications |
Higher rates may be needed only when allowed by the herbicide label |
The product label instructs users to add MES-100 last to the spray tank and continue agitation, while also following the herbicide label for any additional precautions or tank-mix requirements.
How to Use
- Fill the spray tank according to the herbicide label instructions.
- Add the selected post-emergent herbicide and mix thoroughly.
- Add Drexel MES-100 last unless the herbicide label states a different mixing order.
- Maintain agitation and apply according to the herbicide label directions.
- Do not use in aquatic applications.
Safety & Storage Notes
| Safety Item |
Label/SDS Guidance |
| Signal Word |
Warning |
| Hazards |
May cause eye and skin irritation; harmful if swallowed |
| PPE |
Wear eye protection, face protection, protective gloves, and protective clothing |
| Storage |
Store in original container, keep tightly closed, and protect from freezing |
| Environmental Note |
Do not contaminate water sources during equipment cleaning or disposal |
The SDS also classifies MES-100 with oral acute toxicity Category 4, skin irritation Category 2, and serious eye irritation Category 2B, so proper handling and PPE are important.
