Propspeed Foulfree Transducer Foul-Release Coating 15 ml Kit

Why Transducer Fouling Matters

Marine growth on the face of a transducer directly interferes with sonar signal transmission and reception. Even a thin layer of slime or barnacles can reduce sensitivity, weaken bottom-echo returns, and cause you to miss fish targets entirely. For Canadian boaters navigating rocky coastlines, shallow Great Lakes passages, or unfamiliar anchorages, accurate depth readings are not just convenient — they are essential for safe navigation.

Propspeed Foulfree addresses this problem at the source by preventing fouling from gaining a foothold on the transducer surface in the first place.

How Foulfree Works

Unlike traditional antifouling paints that rely on copper or other biocides to poison marine organisms, Foulfree uses foul-release technology. The silicone polymer coating creates an ultra-smooth, slick surface that marine growth simply cannot adhere to. Because it contains no toxic substances, it does not harm the surrounding marine environment — an important consideration in Canadian waters where environmental regulations are strict.

• Silicone polymer binder forms a glossy, clear finish
• No copper, biocides, or toxic compounds
• Growth is discouraged mechanically rather than chemically
• Clear coating does not alter the appearance of the transducer

AIRMAR Certification and Sonar Performance

Foulfree has been tested and certified by AIRMAR, confirming that when applied correctly, the coating results in no loss of transducer performance or signal strength. This certification gives boaters confidence that protecting their transducer from fouling will not compromise the very readings they depend on. Whether you run a simple depth sounder or a high-resolution fish finder, Foulfree maintains full signal clarity.

Simple Three-Step Application

The Foulfree kit is designed for straightforward DIY application. No special tools or professional skills are required — everything you need is included in the box.

• Step 1: Clean and prepare the transducer surface using the included abrasive pad and XDclean wipe
• Step 2: Apply one thin coat of Foulfree using the provided application brush
• Step 3: Allow a minimum of 8 hours to dry before launching (24 hours in cooler conditions of 5–13°C)
• For plastic fairing blocks, lightly sand with 40 grit sandpaper (not included) to improve adhesion
• Do NOT sand the transducer face itself — this will damage the transducer and void the manufacturer's warranty

Long-Lasting Protection and Haul-Out Stability

A single application of Foulfree provides a minimum of 12 months of protection, with longer service life commonly achieved in cooler waters — a benefit for Canadian boaters whose vessels spend part of the year in colder temperatures. The coating does not dry out, crack, or lose effectiveness when the boat is hauled out, stored ashore, or trailered between launches. This makes it well-suited to the seasonal boating patterns common across Canada, where vessels may sit on the hard for five months or more over winter.

Specifications

• Product Type: Transducer foul-release coating
• Binder Type: Silicone Polymer
• Solvent: Aromatic/Aliphatic Blend
• Colour: Clear
• Finish: Glossy
• Kit Volume: 15 ml
• Coverage: Up to 1 sq. ft. per kit (theoretical: 11 m²/L | 448 sq ft/US gallon)
• Recommended Wet Film Build: 90 microns per coat
• Dry Time (Touch Dry): 3 hours at 20°C
• Dry Time (Hard Dry): 8 hours at 20°C
• Minimum Dry Time Before Launch: 8 hours (24 hours in 5–13°C conditions)
• Service Life: Minimum 12 months
• Shelf Life: 24 months
• Specific Gravity: 0.94–1.04
• Flash Point: 28.2°C
• Boiling Point: 136.2–144.4°C
• Viscosity at 25°C: 500–800 cSt
• Explosive Limits: 1.1–7 vol %
• Vapour Density: 3.7 (air = 1)
• Water Solubility: Insoluble in water; soluble in organic solvents
• Certification: AIRMAR Certified — no loss in transducer performance
• Transport Classification: UN 1263, Class 3, Packing Group III
• Compatibility: Marine transducers only

Key Features 

• AIRMAR certified — independently verified to cause no loss in transducer sensitivity or signal strength
• Foul-release technology — prevents marine growth from adhering without relying on toxic biocides
• Maintains sonar clarity — keeps the transducer face clean for accurate depth and fish target readings
• Minimum 12-month service life — one application protects through an entire boating season and beyond
• Haul-out stable — coating remains effective through extended dry storage, trailering, and Canadian winters
• Environmentally responsible — contains no copper or toxic compounds, safe for sensitive waterways
• Complete application kit — includes abrasive pad, XDclean wipe, application brush, and coating
• Three-step application — clean, condition, and apply with no special tools required
• Clear, glossy finish — does not alter the appearance of the transducer housing or face
• Works in fresh and saltwater — effective against algae, slime, barnacles, and zebra mussels