Clearcast

SePRO · Equivalent to 11.4% · EPA Reg 241-437-67690 · Herbicide Document last checked 2026-05-30

About this product

Active ingredient Equivalent to 11.4%

Manufacturer SePRO

Category Herbicide

Full details for Clearcast

Source product label ↗ Open the catalog source label while the local copy is reviewed. Verify the product name, EPA registration number, and revision before use. Source safety data sheet ↗ Open the catalog source SDS while the local copy is reviewed. Verify the exact product and revision before relying on it. EPA registration data Reg. 241-437-67690 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 241-437-67690 →

Clearcast is a herbicide designed for the control of vegetation in aquatic and non-crop areas. Its active ingredient is imazamox (as ammonium salt of 2,4-[(4-methyl-6-oxo-1H-pyridazin-3-yl)amino]-6-methylpyridine-3-carboxylic acid) at a concentration of 12.1%. It is used to control a wide variety of emergent, floating, and shoreline species, including grasses, sedges, and certain broadleaf plants. The product can be applied via broadcast spray, foliar application, injection (hawk and squirt), or as a basal treatment. It is suitable for use in both indoor (managed water bodies) and outdoor aquatic environments. Application methods include ground application using spray equipment or aerial application via fixed-wing aircraft or helicopter. Users should note that imazamox is highly effective but requires careful management of application rates to avoid exceeding environmental limits. Handling requires specific PPE, including long-sleeved shirts, long pants, chemical-resistant gloves, and protective eyewear. Always follow specific instructions for mixing and dilution to ensure efficacy and minimize environmental impact.

Pests covered (5)

Emergent, Floating, and Shoreline Species (e.g., Alligatorweed, Common Reed, Water Hyacinth, etc.)Susceptible Aquatic Plants (50 to 200 ppb)Moderately Susceptible Aquatic Plants (100 to 300 ppb)Less Susceptible Aquatic Plants (200 to 500 ppb)Vegetation

Areas treatable (2)

Aquatic environments, non-crop areas, ditches, and canalsWater bodies

How to treat each type of area 4

Aquatic environments, non-crop areas, ditches, and canals

Target pest	Location	Rate	Unit	Label notes
Emergent, Floating, and Shoreline Species (e.g., Alligatorweed, Common Reed, Water Hyacinth, etc.)	Outdoor	Variable (see tables)	fl oz/A	Can be applied via broadcast spray, foliar application, injection, or basal treatment.

Water bodies

Target pest	Location	Rate	Unit	Label notes
Susceptible Aquatic Plants (50 to 200 ppb)	Outdoor	50-200	ppb	Includes species like Curlyleaf pondweed and Eurasian watermilfoil.
Moderately Susceptible Aquatic Plants (100 to 300 ppb)	Outdoor	100-300	ppb	Includes species like American pondweed and Bladderwort.
Less Susceptible Aquatic Plants (200 to 500 ppb)	Outdoor	200-500	ppb	Includes species like Bulrush and Cattail.

Mixing instructions 1

For pests	Label notes
General aquatic vegetation	May require use of spray adjuvants like nonionic surfactants or methylated oils depending on target species.

Worker safety

PPE required Long-sleeved shirt and long pants; Chemical-resistant gloves (barrier laminate, butyl rubber ≥14 mils, nitrile rubber ≥14 mils, neoprene rubber ≥14 mils, or polyethylene/polyvinyl chloride); Shoes plus socks; Protective eyewear.

Timing & weather

Avoid application during temperature inversions.
Do not apply if wind speed is greater than 10 mph.
Avoid application in low relative humidity to prevent large droplet drift.

Use restrictions 7

DO NOT apply to plants outside the treated area.
DO NOT contaminate water with more than 500 ppb active ingredient.
DO NOT exceed 1 gallon of Clearcast per acre for broadcast spray.
DO NOT apply in wind speeds greater than 10 mph.
DO NOT apply during temperature inversions.
DO NOT use to irrigate greenhouses, nurseries, or hydroponics.
DO NOT plant sugars, onions, potatoes, or other sensitive crops in treated soil.