Vilnus F25 vs F50 vs F100: Choosing the Right Iodine Concentration

The F-Series: Iodine Concentration as the Variable

The Vilnus F-series — F25 Active, F50 Active, and F100 Active — are all iodine-based post-milking teat dips that share the same film-forming base chemistry. The primary variable across the range is the active iodine concentration. Choosing the right concentration depends on the mastitis challenge level on the farm, the intended application method (ready-to-use vs concentrate), and the buyer's distribution or manufacturing model.

F25 Active: Lower-Pressure Herds and Cost Efficiency

Vilnus F25 Active delivers approximately 2,500–3,000 ppm active iodine. This concentration tier is appropriate for:

• Herds with low to moderate mastitis incidence and well-managed environmental hygiene
• Operations where the primary need is consistent daily post-milking protection rather than intensive remediation
• Cost-sensitive operations that want an effective iodine dip at a lower product cost per application

F50 Active: The Standard Commercial Choice

Vilnus F50 Active at 5,000 ppm active iodine is the most commonly specified tier in commercial dairy supply. At this concentration, F50 Active delivers:

• Reliable rapid kill of contagious mastitis pathogens (S. aureus, Strep. agalactiae)
• Effective coverage against major environmental pathogen groups (E. coli, Klebsiella)
• Film-forming protection through the standard twice-a-day inter-milking interval

F50 Active is the default recommendation for most herds without specific reasons to go higher or lower.

F100 Active: High-Pressure Herds and Concentrate Supply

Vilnus F100 Active is a high-concentration iodine formulation positioned for:

• Herds with elevated mastitis challenge — high somatic cell counts, known contagious pathogen pressure
• Concentrate supply to distributors who dilute to target concentration on-farm or re-package at use-concentration
• Operations running extended milking intervals (3× or robotic milking) where the inter-milking period extends beyond standard twice-a-day

For robotic milking operations specifically, Vilnus F100 AC RBT is the robotics-adapted variant of the high-concentration F100 product.

Stand-Alone 3000 and 5000 Active Products

Vilnus 3000 Active and Vilnus 5000 Active provide the same concentration targets as F25 and F50 but as separately positioned SKUs. These are commonly used where buyers or distributors specify by iodine PPM directly rather than by the F-series product naming convention.

Summary Guide

Product	Active Iodine	Best For
F25 Active / 3000 Active	~3,000 ppm	Lower-pressure herds, cost efficiency
F50 Active / 5000 Active	~5,000 ppm	Standard commercial dairy operations
F100 Active	High concentration	High-pressure herds, concentrate supply

Request a quote for pricing across the Vilnus F-series range.