Hull Pro in Freshwater — The Best Results Hull Pro Can Deliver.
Freshwater is where Hull Pro truly shines. Minimal maintenance, maximum performance, and the cleanest hull you have ever had on a lake boat. Here is what to expect after you make the switch.
What to expect
Hull Pro in Freshwater — The Honest Summary.
No antifouling needed
Freshwater does not support the same fouling organisms as saltwater. Hull Pro replaces antifouling paint entirely on lake boats. No copper, no biocides in the water your family is swimming in and drinking from.
End of season cleaning only
In freshwater, you can wait until the end of the season to clean. Growth typically starts appearing around day 60 to 90. One power wash at haul-out and your hull looks brand new.
Full performance all season
Hull Pro's smooth surface reduces drag from day one. Faster speeds, better fuel economy, and a hull that stays cleaner longer compared to bare gelcoat. No bottom paint build-up to slow you down.
Is Hull Pro right for you?
We'd rather lose a sale than have an unhappy customer.
✓ Hull Pro is a great fit if...
Your vessel is lift-kept or trailer-kept on a freshwater lake. This is the ideal Hull Pro scenario — best results, minimal maintenance, maximum performance.
Your vessel lives in a freshwater marina full time. Growth starts around day 60 to 90. Pull at the end of the season, power wash, done.
You are switching from antifouling paint on a lake boat. Copper-based antifouling paint is banned or restricted on many freshwater lakes. Hull Pro is the right replacement.
You sell or trade boats frequently and want a clear hull that matches the hull sides — increasing perceived value at resale.
You boat on the Great Lakes, Lake Tahoe, Texas Hill Country lakes, Lake of the Ozarks, or any inland freshwater body. Hull Pro was built for this.
✗ Hull Pro may not be the right fit if...
You expect a zero-growth, zero-maintenance hull. That product does not exist. Hull Pro makes maintenance easier and less frequent — it does not eliminate it.
"Not sure if Hull Pro is right for your water and setup? Contact us before you buy. We'll give you a straight answer — even if that means pointing you toward a different solution."
How it works
Do not bottom paint your boat in freshwater. Here is why.
Traditional antifouling paints use copper-based biocides to kill marine growth. In saltwater, that is a debatable trade-off. In freshwater, it is an unnecessary one. Copper-based bottom paint is banned or restricted on many US freshwater lakes because of the damage it causes to the ecosystems your family is boating and swimming in.
Freshwater does not produce the same fouling organisms as saltwater. The barnacles and hard growth you fight in the ocean simply do not exist in most freshwater environments. What you get instead is algae and light slime — and Hull Pro's smooth ceramicized epoxy surface makes both significantly easier to remove at end of season.
The result: a hull that outperforms bare gelcoat all season, cleans up in one power wash at haul-out, and holds its value because the bottom matches the hull sides. No ugly build-up. No rough paint degrading your speed. Just a clean, fast, protected hull.
Why freshwater boaters choose Hull Pro
Up to 20% fuel savings
A smooth hull reduces drag — engines work less hard at the same speed.
Up to 15% speed increase
Reduced friction translates directly to faster hole shots and higher top speeds.
No recoating every season
Hull Pro is non-sacrificial. One application protects for multiple seasons.
85% UV resistance
Hull won't yellow on lift or dry rack storage — resale value stays protected.
Gelcoat: blister and osmosis protection
Hull Pro's ceramicized epoxy bonds to gelcoat and creates a barrier against water intrusion — protecting against blistering and osmotic damage on fiberglass hulls.
Oxidation protection for gelcoat and metal
Hull Pro's ceramicized epoxy keeps fiberglass hulls from fading and chalking, and aluminum pontoon and tritoon tubes from pitting and surface degradation season after season.
Trailer and lift safe
Hard epoxy formula — won't slip off bunks or straps. Power wash and acid wash resets the coating without degradation.
100% biocide-free
No copper, no toxic chemicals leaching into the water your family swims and boats in.
Real world results
10 Weeks in Freshwater — 31ft Regulator, Lake Erie
Travis Schwinkendorf from Coastal Yacht Detailing shows exactly what to expect after 10 weeks in freshwater. Growth happens. Cleaning takes minutes. No false expectations — just honest results from a real install.
Maintenance guide
How to keep your Hull Pro-coated hull in top shape in freshwater.
Freshwater maintenance is simple. Growth starts around day 60 to 90. In most cases one end-of-season haul-out is all you need. Here is what that looks like.
In-season maintenance
Take her out and open it up
Running at speed regularly helps knock off soft algae before it matures. If you are using the boat, you are already doing most of the maintenance work.
Mid-season cleaning is optional
You do not need to clean mid-season in freshwater. You may see growth starting around week 8 to 10. If you are comfortable with that, leave it until haul-out. If you prefer a cleaner hull mid-season, a quick wipe-down is all it takes.
Touch up small damage as needed
Hit the beach, scraped a rock, bumped the dock? Easy. Sand around the scuff, apply a touch-up coat from a mini kit, wait 72 hours before relaunch. Keeps you within warranty. Your dealer logs it and you keep going.
End of season haul-out reset
Pressure wash first
Gas-powered pressure washer at max 4,500 PSI handles most freshwater growth in one pass. As Travis shows in the video above — this is usually the whole job.
Light scrub if needed
A 3M white scouring pad with soap and water handles any remaining soft growth after pressure washing. Always use white pads — not metal or abrasive materials.
Toilet bowl cleaner for stubborn growth
At freshwater locations, stubborn stains and algae come right off with regular toilet bowl cleaner. If you need something stronger, Hull Pro handles acid-based cleaners like On and Off Hull Cleaner without delaminating. Acid wash resets the coating completely — no degradation, no recoating needed.
Pro tip: If you have registered for our product warranty, your certified Armus dealer handles haul-out resets, logs the service to your warranty file, and gets you back in the water fast.
Full Protocol — Divers & Installers
Hull Cleaning & Hull Diver Instructions
Step-by-step diver instructions, pull-and-reset checklist, tool recommendations, frequency guidance, and a downloadable diver reference card — everything needed to maintain Hull Pro correctly and keep your warranty intact.
How long does it last
No coating lasts forever. Hull Pro included. Here is what the field data shows.
Freshwater is where Hull Pro consistently delivers its longest service life. Field use shows 5+ years of solid protection — and in many freshwater lake environments, especially for lift-kept and trailer-kept vessels, performance well beyond that is common.
When the coating does start to wear, it fades gradually. You will see chalking, loss of beading, or biofouling returning in areas that stayed clean for years. It is a signal, not a surprise. You will know it is time before it is actually a problem.
When you hit that 5-year mark, give the hull a good look and go from there. There is no clock forcing a reapplication — just watch for the signs.
Freshwater lake conditions are where Hull Pro has the easiest job. Less fouling pressure, gentler chemistry, and for trailer-kept boats — long dry periods that let the coating breathe. 5 years is a floor, not a ceiling.
Signs Hull Pro is approaching end of protection life
Loss of gloss or sheen — dullness is often the first indicator of UV degradation
Chalking — a powdery surface residue that wipes off. Classic sign of UV-broken resin
Visible micro-cracking or checking on the surface film
Surface feels rough or porous where it was once smooth — coating losing film integrity
Algae and light slime returning faster than it used to — protection is thinning
Water no longer beads on the hull surface — hydrophobic properties degrading
Increased drag sensation — engines working harder at the same speed
Fouling patterns returning in areas that stayed clean for years
Seeing these signs on your hull?
Contact us to assess your coating →From the project gallery
See it in action — a real freshwater install.
Great Lakes · Freshwater
Sea Ray SLX 280
Zero antifouling needed. Hull Pro applied in freshwater where copper-based paint is banned. Clean hull, full performance, all season on the Great Lakes.
Read the full project →I was originally skeptical about Hull Pro. After testing it on my own 35ft SeaHunter for use at the lakes, the performance benefits were undeniable. Water and grime rinse off effortlessly. I believe in this product so much I partnered exclusively with Armus as their Great Lakes regional distributor.
Travis Schwinkendorf
Ready to protect your hull?
Not sure if Hull Pro is the right fit for your freshwater setup? Contact us before you buy — we'll give you a straight answer.