• Motorboat Foul Release Tests
  • Motoryacht Antifouling Paint
  • Sailing Boat antifoul and foul release paints
  • Foul Release and Antifouling paints
  • Case Studies Antifouling Foul Release Paints
  • Case Studies Foul Release
  • Case Studies Antifoul Windy 40
  • Case Studies Princess Motorboat Antifoul Foul Release
  • Foul Release application Windy 37

AquaMarine case studies

 Research and results using foul release paint

 

CASE STUDY: COTE D'AZUR

Boat Coated: Windy 37'

Original Application: January 2014

"The last time Sevo appeared in MBY was back in the February 2014 issue when I reported that Sevo's hull, legs and props were about to be treated with a new product called AquaMarine. This biocide-free alternative to regular antifouling paint claims to work by forming a semi-permanent hydrophobic outer layer on the hull, to which even the most determined barnacle has difficult sticking. Despite my initial skepticism, I paid to have the existing antifouling stripped off so that AquaMarine could be applied. Well, it's now ten months since my boat went back in the water and I'm pleased to say I've got some good, and some very good news to report."


Applying Foul Release Paint

First Lift: October 2014

"Let's start with the good news - in the warm waters of the Med, AquaMarine seemed to do a better job of keeping Sevo's hull crud-free than my usual antifouling paint. Most regular antifouling works by leaching out biocides that prevent weed and barnacles from growing on the hull. However, this leaves a thin layer of 'dead' paint that needs to be worn away from the boat moving through the water to expose a fresh layer. In my experience, this only works if you use your boat on a regular basis. I often have to leave Sevo idle for weeks or even months on end, meaning the hull builds up an ugly layer of growth that's hard to shift. The only option is to lift her out a couple of times a season and have her power-washed - an expensive pastime if you keep your boat in the Cote d'Azur."


Applying Prop Foul Release Paints"

As I was trialing AquaMarine this season, I had Sevo performance tested a week after the treatment so we would see any change in performance in the season. At 2,000rpm we were doing 11 knots, at 3,000 rpm 27.6 knots, and at 3,650 rpm 35 knots (top speed). We used Sevo regularly until mid-July, when we left her berthed for 11 weeks. In mid-October we repeated the sea trial and at 2,000rpm got the same 11 knots, with only slight drop off at 3,000rpm to 25 knots."

"Sevo refused to rev any higher as there was still some growth on the hull. However, far from being disappointed at our 25 knot top speed, I was amazed at how easily Sevo would still climb on to the plane, something that had never happened before this late in the season (Unless Sevo's hull had been washed off.) Not only that, but the growth that had built up over the summer could easily be brushed off by hand. A couple of minutes with a brush saw one side of the forward hull spotless again, and I'm told the results would have been even better had I used Sevo more regularly during the high season."


Applying Hull Foul Release Paint

 

"Now for the really good news - the props have remained clean throughout the season, which must be the reason why Sevo's performance below 2,500rpm is close to what it was at the beginning of the season. The icing on the cake is that AquaMarine is expected to last for several seasons.

The cost of treating the hull with AquaMarine will depend on the size (my boat was done as a free trial) but I'm told it shouldn't be much more expensive than regular anti foul.

My next step will be to lift Sevo in early 2015 and see how easy the hull is to clean. I'll report back in a few months time but even now, I can't see me going back to regular antifouling because AquaMarine really does seem to do what it says on the tin."

 

Second Lift: April 2015 (15 months from initial application)

Some 15 months after the initial application of AquaMarine HULL, we lifted Sevo out of the water at the beginning of April so that we could have a proper visual inspection of how well the treatment was coping with keeping growth at bay.

It was a beautiful sunny day and we couldn’t resist having a quick blast around the bay before the lift. As we returned and nosed into the marina lift station, the giant belts were already in the water and within seconds were in position under the hull. The crane got to work and we went straight from gently bobbing in the crystal –clear Mediterranean water to hanging above the concrete in the boat park in a matter of minutes. All very un-health and safety.

It was obvious some growth had taken hold since I last saw Sevo back in late October, but just as I’d found back in the summer, this was easily wiped off with a sweep of my fingers. Even barnacles that would usually lacerate finger flesh before even considering moving were gently wiped away with a nudge of a thumb. Think of your boat’s hull having the same thick covering as used on non-stick frying pans and that’s exactly how AquaMarine feels to the touch on Sevo’s hull.

With the boat safely docked, the team set about gently power-washing the hull clean, using a very low setting to get the grime off but without damaging the AquaMarine surface itself. We could have probably achieved much the same result ourselves with a hose and a squeegee. All went well but there were a few areas on the legs where the original coating had come away, leaving some unprotected areas the size of a 50p coin. It would have been useful to have a can of AquaMarine available to re-apply to these areas before putting the boat back in the water but as Sevo is forming part of a long-term trial, it seemed right to leave them untouched.

On the flip side, the props still looked remarkably clean, with the translucent AquaMarine PROP coating clearly visible, with only a little degradation on the tips.

Sevo being washed

 

The boat next to Sevo had been lifted a few hours earlier and seeing the difference in the amount of work the boatyard operators were having to do to remove 12 months of growth was remarkable. The team was even resorting to an acid treatment to shift the worst offending barnacles from the hull. And that’s before several litres of conventional antifoul were reapplied for the following season. Overall, I remain very impressed with what the AquaMarine treatment offers a boat owner. The costs aren’t too bad either – a DIY Hull kit for Sevo cost £577.50 inc. VAT and two AquaMarinePROP treatments came in at £213.60.

The hull treatment doesn’t stop growth altogether, but massively facilities removal. Had I used the boat more, then most of the growth would have been automatically washed off by the movement of the boat through the water. I can already see there will be no need to lift Sevo on an annual basis. Instead, we are planning to employ a diver once a year to brush the hull clean and fit new anodes before the season starts, and then lift the boat out every 24 months for a leg and bellow service.

I plan to reapply a coating of AquaMarine HULL when needed to the hull and legs at the same time. All of which adds up to significant cost and time-savings compared with annual antifouling. I’ve paid up to now. All in all, I’d call this a magic result!

 

 

 

 

CASE STUDY:

Boat Coated: Moody Eclipse 33


Moody Eclipse 33 Foul Release Paints"Just a quick update on the AquaMarine antifoul that I applied in the spring on our Moody Eclipse 33. We have completed some 600 nautical miles in the boat this summer, the antifoul seems to be performing as predicted. I am experiencing some buildup of fouling as one would expect but found that simply by brushing the hull it is coming off. Even the barnacles are coming off easily when you rub your fingers over them they just fall off. Would not try that with conventional antifoul as you would end up with lacerated fingers. Also found after being in a rough sea the accumulated fouling is falling off."

I have brushed the hull twice this season from an inflatable. It takes an hour or so and looks as good as new again. I am very pleased with the way the AquaMarine has performed so far I believe the boat is faster and also my fuel burn has reduced when under engine, she has a 43HP turbo engine and her burn is 1.7ltrs / hour at 2000 rpm."

After examining the coating, the team got to work cleaning any buildup from the hull. It was actually more effective to use a squeegee than to pressure wash it, though both methods resulted in quick and easy removal of any slime. Note the marks left on the rudder from a sweep of the fingers.The cleaning process was fast and efficient, and the boat was ready to return to the water after just 10 minutes. The hydro-kinetic finish of AquaMarine HULL coating left the hull shiny and spotlessly clean.

 

TESTIMONIAL: JERSEY HARBOUR

Boat Coated: Princess V52

After only six months of use, I'm really impressed with the hull cote and the way it cleans up and the way the barnacles fall off with a scrape of the fingers. Nice and clean to use and lovely pristine finish ready to go back in the water.

Ben Dandridge

 

 

CASE STUDY: LA NAPOULE, FRANCE

Boats Coated: Goldfish 23 and Goldfish 28

Coral Worm Waters

The waters around La Napoule in Southern France are warm, and like most coastal areas, rich with marine life. The main fouling organism in this region is coral worm, a little critter that can leave your boat barely controllable if allowed to take hold. This trial of AquaMarine HULL and AquaMarine PROP foul-release coatings involved two test vessels, Goldfish 23 and 28, both boats were coated with AquaMarine HULL on 3 September 2013. The propellers of Goldfish 28 were also treated with AquaMarine PROP at the same time.

A serious test for AquaMarine foul-release

In these waters it was reported that underwater surfaces such as the hull and propeller would be contaminated with marine growth within two to three weeks, especially with coral worm. Two days after application, Goldfish 28 was driven at high speed (excess 60 knots) for 45 minutes to assess the adhesion of AquaMarine PROP to the blades. Examination of the propellers indicated that the foul release coating was undamaged and intact.

 

The Inspection - how did AquaMarine perform?

On 7 October (five weeks after application) an independant inspection was carried out on Goldfish 28 whilst still in the water, by William Parton. The hull had no hard fouling but had some slight slime. This wiped off very easily with fingers, The coated propeller had no contamination and the coating was intact, whereas the uncoated drive leg had significant coral worm contamination. On 8 November (nine weeks after application) both vessels were inspected by William Parton, who reported that:

"Goldfish 23 has not been used, I took it for a five minute run before the lift but not long enough to really knock anything off. On lifting there was some slight surface fouling, however by gently wiping with a squeegee all the fouling came off easily. If the boat had been driven prior to lifting it is my opinion that most of the fouling would have been washed off."

He added: "Goldfish 28 has only run about 10 hours but did have a good blast (up to 50 knots) for one hour before lifting hence most of the shell was knocked off. Speed was thanks to the coated prop being 90% clean."

AquaMarine foul-release in La Napoule - A Performance Summary

All advice on fouling in the La Napoule region suggested that we'd see coral worm prevalent within two to three weeks. After nine weeks both boats showed no such fouling, instead just a thin biofilm was present and easily wiped off by hand. This is especially impressive, as Goldfish 23 hadn't moved moved since AquaMarine HULL had been applied. Perhaps the clearest indication that an AquaMarine foul-release coating enhances boat performance was the speed test and the fouling comparison of Goldfish 28's prop to surrounding uncoated areas.

Maintenance Made Easy

This trial also included a routine maintenance of AquaMarine, involving a simple wipe-clean with a squeegee. Within 30 minutes of lifting the boat the vessel had been easily cleaned and was ready for returning to the water without the need for a messy and expensive application of new anti-fouling paint.

 

CASE STUDY

Boat Independently Coated: Dell Quay Marlin, 520 Sport

"Here's my review and findings after 1 year of using AquaMarine foul release rather than traditional antifoul. I'm based in Guernsey. As mentioned in previous posts, I got my boat ready for the season in April last year and didn't enjoy stripping off the old flaking antifoul. I saw the AquaMarine article in MBY and decided to give it a a go given it's multi season claims and a price, which after discount, made it equal to the cost of priming and antifouling. Today I took the boat out of the water for the first time since May 2015 to do various jobs so I thought I would give an unbiased review of how the AquaMarine has performed after the first year..."


Dell Quay Marlin, 520 Sport Foul Release Test

"To be clear, the product is a 'foul release' system not an antifoul. So growth will occur as it would on a bare hull, however the idea is it can be very easily wiped away or drop off at speed. The company recommend regular cleaning with a squeegee or Scrubbis brush at least monthly however in reality this isn't really practical. It's easy to give the water line and transom a quick wipe over while in the water but not so easy underneath. As it's a small boat (5.2m) I just cleaned the hull by swimming around with a long handled squeegee and wiping away any growth. I did this maybe twice during the summer, the last time being in September. It took me about 15 to 20mins of swimming to clean each time... which was good exercise and free."


Dell Quay Marlin, 520 Sport Foul Release Test Review"The underside and most of the transom were very easy to wipe clean. In between cleans just the movement through the water at 25 knots was clearly enough to knock off anything big that tried to take hold as there was never anything other than a thin layer of muck when I inspected it underwater. Now that I have the boat out of the water and after 6 months of not being cleaned underneath at all, it's a good opportunity to see how it looks...Here's the underside today on dry land. You can see where the slime has wiped off from where the boat slid across the trailer rollers when I loaded it on."



 

Dell Quay Marlin, 520 Sport Bottom Paint TestNow that I have the boat out of the water and after 6 months of not being cleaned underneath at all, it's a good opportunity to see how it looks.....

Here's the underside today on dry land. You can see where the slime has wiped off from where the boat slid across the trailer rollers when I loaded it on."

 

 


 

Take a look at the video below or look at the original review on the MBY website here.

 

 

CASE STUDY

11 METRE YACHT - USED FOR RACING & CRUISING

I have had the AquaMarine HULL supplied and applied by Simon from SK Painting in May, 2016.

I have an 11m yacht used for 50/50 racing and cruising.

I found Simon to be very efficient and proactive and would certainly use him again. In regards to the product, upon application I was surprised how grippy it was by touch and soon found once it rained and the hull got wet, it was incredibly slippery to the point I was worried about wet slings slipping off at launching.

I was also surprised with how 'thin' the top coat was (100 microns?) but was assured it was tough.

I have now cleaned the hull twice and found:

1st time (late October) it had minor fouling, (slight green and barnacle feet), with rubber scraper I was able to swim the length of the boat taking off the width of the blade (approx 200mm) in one sweep, it didn't get 100% of the green but did get 100% of the barnacle feet. Because of an important race I had to get it perfect, and found with a square of carpet the remaining green just fell off. With two of us it took approx. 20mins to complete the hull and appendages.

2nd time, Mid Nov growth was speeding up and had a slight - moderate growth; barnacles were everywhere and the green growth/slime. I didn't need to clean but it was a hot day and needed a swim.

Once again it all came off incredibly y easily just as the first time. Spent 20 mins again with just myself in the water, but not as fussy with the slime as now in cruise mode.

Overall I am very happy with the choice, I have had a great comparison with a mates 32ft launch. He is in the same location (in the BOI) He painted with No.5 approx 2 months after I went back in the water, he has approx. 35% of the growth of mine but he is unable to clean as from experience it takes off the antifoul and doesn't remove the barnacle feet so would be just as bad 2 weeks later.

I am yet to notice any scratches in the coating (and I have been looking).

So in summary it does foul quicker but super easy to dean (be a breeze with a tank),

Would suit people that don't mind getting in the water to clean . At a guess 1 per month during high growth would keep it pretty good.

Regards

Bryce Bindon

CASE STUDY: SOUTHAMPTON, UNITED KINGDOM

Boats Coated: 'Viaqua' Princess 45



In July 2016, this beautiful Princess 45 named 'Viaqua' was hauled out of the water in preparation for removal of the previous biocide heavy antifoul coating and the new application of our AquaMarine FRC Hull and Propeller coatings. In this section we will focus on the original prop application and subsequent cleaning results after haul.

These initial images illustrate just how severe the fouling was on the propellers and sterns of the boat, which is usual for any boat left in moderate fouling waters for a few months. An obvious layer of sludge like fouling as well as many other fouling species on the stern drive and fully covered lights can be seen with some barnacle growth on the propellers. 

 

Upon cleaning, the propellers and stern drives were completely scaled back with the propellers being send away for replenishing and repair after the harsh damage of fouling and wear need to be refurbished. After this, AquaMarine PROP was applied to the repaired and polished propellers.

After application, Viaqua was relaunched on the 8th July, 2016. The boat was stationary in the water for 15 days and on the 23rd of July, a sea trial was undertaken. At this point, the boat had done 202 hours. Upon testing, the boat engines achieved an RPM 3500 / 35 knots, which when compared to the manufacturers stats, match them like-for-like.

The boat was moored again and was not revisited until the 18th of November. It’s important to note that the boat only did 16 hours between the months of July and November. Following this, the boat was given another sea trial on the 18th of November and with no cleaning, achieved the following:

27.6 knots at 3100 RPM

This showed a drop of 5.5 knots when compared to the earlier sea trial. The boat was then left, until the 27th of January when it was hauled out and a full clean was done. View of props and running gear just out of the water but after a jetwash and simple clean, which took about 15 minutes for both engines, the results were fantastic.

Upon cleaning, the boat was relaunched and sea trialed again. This time the results were significantly better and demonstrate not only the importance of cleaning a boat that is painted with AquaMarine, but that you will get more speed with less drag.

 

CASE STUDY

BOAT COATED: 800hp vessel Al Dhaen

Recently we carried out pre and post-application sea trials on the super fast 800hp vessel Al Dhaen. 

Pre-Application

The boat had lived out of the water previously and was just gel coat below the water line. Prior to the first inspection after being sat in the water for three weeks, there were already large pin sized heads of coral worm forming on the hull, as well as small amounts of weed attaching around the water line.

Unfortunately we didn’t get a photograph of this as the hull was washed the moment it came out of the water.  The coral worm equated to a small growth that was about the size of a pinhead every 2 square feet, so a relatively small amount. There was also a very fine slime film but nothing that would provide any resistance.

Tests

Under Flat Calm conditions the pre-application readings we took were:

1. 35knots @100 ltrs/hour @ 4200 rpm on both motors.

2. 48 knots @ 256 ltrs/hour @ max 6000 rpm .

AquaMarine Sea TrialsInitially we didn’t think there would be much improvement on these readings with such a fast hull using Twin 400 racing Mercury outboards. Therefore, after post-application re-launch and punching into a 15 knot head wind and choppy seas the readings were to say at the very least; “Quite impressive”.

Under similar conditions the readings were:

1. 39 knots @ 89 ltrs/hr @ 4200 rpm on both motors. A 4 knot increase with an 11 ltr/hour decrease in fuel......MASSIVE!!! 

2. 54 knots @ 256 ltrs/hr @ max 6000 rpm. A 6 knot top end speed increase. We shouldn't expect fuel decreases when engines are at max rpm.

Conclusions

The owner is very pleased with these results and as shown in the readings, it demonstrates that AquaMarine HULLperforms exceptionally well under extreme conditions. We will be following up with another sea-trial later in the season but for now, here’s the boat owner’s feedback:

Testimonial – Al Dhaen, December 2016

We’ve used the boat a few times and to us it feels like it’s picked up 8-10% efficiency. All in all for want of a better term the boat feels a lot slipperier. So initial feelings on the silicone based anti foul from our point of view are very positive, given the extra fuel saving and the increase in performance and we are very interested in seeing what the long term results are.

As we discussed we will be lifting the boat in 10-11 months to see how it’s going and more than likely replace the anode and give the hull a wipe down. If you would like to give my phone number to any potential clients I am happy to help you promote and relay my personal experiences to your potential customers.

In closing we would like to once again thank you for giving us the opportunity to try out this product, and for being so hands on with the whole project.

We wish you and your family a Merry Christmas.

Regards,

Johanna & Graham

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