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DREXEL
MES-100 MSO Adjuvant
MES-100 MSO Adjuvant is an effective multi-component surfactant that helps enhance post-emergent herbicides penetration into foliage and increases control over emerged weeds.
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MES-100 MSO Adjuvant Product Page
Min : 67.95 - Max : 67.95
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Price as of
11/04/25
11/04/25
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MES-100 MSO Adjuvant, is a double-action vegetable oil concentrate that can easily replace non-ionic surfactants and crops oils to maximize the performance of post-emergent herbicides into hard-to-control weeds.
This non-ionic surfactant is specially formulated from a 100% methylated seed oil blend, allowing a faster spread and penetration of post-emergent herbicides into thick, waxy leaf surfaces.
MES-100 MSO Adjuvant provides a gentle yet firm control with most post-emergent herbicides over difficult weed populations in areas where typical surfactants and crop oils are limited.
Tools Needed
To use MES-100 MSO Adjuvant, you will need a post-emergent herbicide that can be be applied with either a spray rig, handheld pump sprayer, backpack sprayer, hose-end sprayer, or other large-volume application equipment.
How to Use
- Step 1: Determine how much MES-100 MSO Adjuvant to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment area in feet then multiply them together (length X width = square footage). For acreage, take the square footage and divide it by one acre (square footage / 43,560 sq. ft. = acres). Apply 1 pint to 5 quarts of MES-100 MSO Adjuvant per acre with post-emergent herbicides.
- Step 2: Mix your selected post-emergent herbicide according to its product label instructions. Always add MES-100 MSO Adjuvant last to the spray mix and continue agitation or follow specific tank filling information on the herbicide label.
- Step 3: When post-emergent herbicide has been thoroughly mixed with MES-100 MSO Adjuvant begin spraying as instructed on the selected herbicide label.
Where to Use
Apply MES-100 MSO Adjuvant to dry land site areas such as turf.
Not for aquatic use.
When to Use
Use MES-100 MSO Adjuvant to replace non-ionic surfactants and crop oil (petroleum oils) in most post-emergence herbicide spray mixes.
Safety Information
MES-100 MSO Adjuvant is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.
Special Considerations
MES-100 MSO Adjuvant will not control emerged weeds on its own. It must be mixed with a post-emergent herbicide.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions * = not registered** = restricted use | 2.5 Gallon: VT** |
| Brand | DREXEL |
| Keith's Pro Tips | "MES-100 MSO Adjuvant is compatible with most post-emergent herbicides. Before full-scale application, we recommend adding a small portion of the products being used in a separate container. If the product does not mix well then it may not be suitable for mixing with this product." |
| Product Drawbacks | MES-100 MSO Adjuvant can only be mixed with post-emergent herbicides. |
| Application Equipment | Backpack Sprayer, Hose End Sprayer, Pump Sprayer, Spray Rig |
| Application Methods | Broadcast Spray, Spot Treatment |
| Active Ingredient | Methylated Seed oil, Alkylphenol ethoxylate 100% |
| Product Type | Adjuvant |
| Formulation | Synergist |
| Application Rate | Apply 1 pint to 5 quarts of MES-100 MSO Adjuvant per acre with post-emergent herbicides. |
| Shelf Life | MES-100 MSO Adjuvant will last up to 3 years when stored in a cool, dry environment. |
| Yield | 2.5 gallons of MES-100 MSO Adjuvant will cover up to 2 acres. |
| Use Sites | Outdoors |
| Time to Kill | MES-100 MSO Adjuvant does not eliminate weeds, but will quickly help post-emergent herbicides penetration when used. |
| Comparable Products | Methylated Seed Oil (MSO) |
| EPA Registration # | Exempt |
| Restricted Use | No |
|---|---|
| Availability | Online |
| Signal Word | WARNING |
| Keith's Pro Tip | "MES-100 MSO Adjuvant is compatible with most post-emergent herbicides. Before full-scale application, we recommend adding a small portion of the products being used in a separate container. If the product does not mix well then it may not be suitable for mixing with this product." |
| Time to Kill | MES-100 MSO Adjuvant does not eliminate weeds, but will quickly help post-emergent herbicides penetration when used. |
| Chemical Type | Adjuvant |
| Formulation | Synergist |
| Application Methods | Broadcast Spray, Spot Treatment |
| Product Drawbacks | MES-100 MSO Adjuvant can only be mixed with post-emergent herbicides. |
| Active Ingredient | Methylated Seed oil, Alkylphenol ethoxylate 100% |
| Application Equipment | Backpack Sprayer, Hose End Sprayer, Pump Sprayer, Spray Rig |
| Mix Rate | Apply 1 pint to 5 quarts of MES-100 MSO Adjuvant per acre with post-emergent herbicides. |
| Use Sites | Outdoors |
| Yield | 2.5 gallons of MES-100 MSO Adjuvant will cover up to 2 acres. |
| EPA Registration No. | Exempt |
| Shelf Life | MES-100 MSO Adjuvant will last up to 3 years when stored in a cool, dry environment. |
| Comparable Products | Methylated Seed Oil (MSO) |
| Children or pets? | No |
| Property Characteristics | None |
*Price does not include freight. We guarantee our rate plus shipping will be less than anyone else's price.