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Hempel Silic One anti fouling

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Created by 2bish > 9 months ago, 23 Oct 2018
2bish
TAS, 805 posts
23 Oct 2018 9:21PM
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Has anyone had any experience with this product? Silicon based, biocide and copper free.

www.hempelyacht.com/en-GB/product-list/silic-one-page

cisco
QLD, 12311 posts
25 Oct 2018 12:18AM
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Their blurb looks good on the main page. The silicon idea sounds like it might work which is what prop speed is all about.

If you are due for a slipping, why not contact them, tell them you are on seabreeze and ask them if they will front you the paint for a promo on the forum??

Jode5
QLD, 853 posts
25 Oct 2018 1:56AM
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Select to expand quote
cisco said..
Their blurb looks good on the main page. The silicon idea sounds like it might work which is what prop speed is all about.

If you are due for a slipping, why not contact them, tell them you are on seabreeze and ask them if they will front you the paint for a promo on the forum??


Prop Speed works fairly good on anything that moves fast eg propeller, but not so good on slow moving things such as skegs and rudder shafts. I have Propspeed on my under water lights and I am lucky to get 6 months. This silicon stuff might be better suited to high speed power boats, cold water and boats that are used regularly.

boty
QLD, 685 posts
25 Oct 2018 7:47AM
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it is used on the ferry's to Tangalooma but is very expensive and is more suited to high speed vessels with regular usage patterns

2bish
TAS, 805 posts
25 Oct 2018 10:38AM
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Select to expand quote
cisco said..
Their blurb looks good on the main page. The silicon idea sounds like it might work which is what prop speed is all about.

If you are due for a slipping, why not contact them, tell them you are on seabreeze and ask them if they will front you the paint for a promo on the forum??

Yes not a bad idea Cisco, wouldn't hurt to have a chat. Also, if they can't point me to anyone in southern Tas who has used the product, then that would be a good opening for what you suggest.

2bish
TAS, 805 posts
25 Oct 2018 10:46AM
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Jode5 said..

cisco said..
Their blurb looks good on the main page. The silicon idea sounds like it might work which is what prop speed is all about.

If you are due for a slipping, why not contact them, tell them you are on seabreeze and ask them if they will front you the paint for a promo on the forum??



Prop Speed works fairly good on anything that moves fast eg propeller, but not so good on slow moving things such as skegs and rudder shafts. I have Propspeed on my under water lights and I am lucky to get 6 months. This silicon stuff might be better suited to high speed power boats, cold water and boats that are used regularly.

I wondered about that too Jode. They do have a few sail boats in their "customer experience" section at the bottom of the page, so clearly they're recommending it for slower moving sailboats too. I note also that the silic one for props is a separate product, so it's maybe a different formulation altogether. I definitely tick the cold water box!

rumblefish
TAS, 824 posts
25 Oct 2018 5:58PM
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Used to sell Hempel so got a price for my Etchells.
After stripping back all the old anti foul and primer, $800 was the wholesale price ???? plus probably a sandblast or similar to prep.
Added to that, it has no shelf life once opened, so if you but 8l and use 6l, you waste 2l.

2bish
TAS, 805 posts
24 Nov 2018 10:05PM
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rumblefish said..
Used to sell Hempel so got a price for my Etchells.
After stripping back all the old anti foul and primer, $800 was the wholesale price ???? plus probably a sandblast or similar to prep.
Added to that, it has no shelf life once opened, so if you but 8l and use 6l, you waste 2l.


Sorry rumble, missed this post of yours. Yep that's sounding crazily expensive..what are you using btw?

rumblefish
TAS, 824 posts
25 Nov 2018 10:18AM
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2bish said..

rumblefish said..
Used to sell Hempel so got a price for my Etchells.
After stripping back all the old anti foul and primer, $800 was the wholesale price ???? plus probably a sandblast or similar to prep.
Added to that, it has no shelf life once opened, so if you but 8l and use 6l, you waste 2l.



Sorry rumble, missed this post of yours. Yep that's sounding crazily expensive..what are you using btw?


I used Hempel Olympic Hard and found it good for the price.
Boat would get pulled out a couple of times a year for a light scrub so even with 2 coats there wasn't much left at the end of the season

shaggybaxter
QLD, 2492 posts
25 Nov 2018 9:45AM
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This is an interesting topic. What is the consensus regards antifoul hard or soft compounds for say racing a racer cruiser for SE Qld?
I went for an ablative antifoul last time, and I don't really see how ablative can be slippery compared to hard.
I must be missing some fundamentals. Could anyone classify when ablative and non ablative compounds are used and what for?
Thanks in advance!

Donk107
TAS, 2446 posts
25 Nov 2018 5:27PM
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Hi Shaggy

I found a couple of articles that gives a explanation although on the subject of what works on a boat on a trailer the first two contradict each other

www.bottompaintstore.com/blog/bottom-paint/difference-hard-bottom-paint-ablative-bottom-paint/
www.yoti.com.au/antifoul-hard-or-soft/
www.yachtpaint.com/sgp/diy/ask-the-experts/antifouling-made-easy.aspx

Regards Don

shaggybaxter
QLD, 2492 posts
25 Nov 2018 5:02PM
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Thanks Donk, that was good reading. I was searching around after reading the above and lo and behold I found an old thread talking about the same topic on Seabreeze from last year.
As my antifoul is Micron 66, i'm feeling a lot more comfortable after reading this
www.seabreeze.com.au/forums/Sailing/General/Micron-66-worth-the-extra--?page=1

frant
VIC, 1230 posts
25 Nov 2018 6:20PM
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Select to expand quote
shaggybaxter said..
This is an interesting topic. What is the consensus regards antifoul hard or soft compounds for say racing a racer cruiser for SE Qld?
I went for an ablative antifoul last time, and I don't really see how ablative can be slippery compared to hard.
I must be missing some fundamentals. Could anyone classify when ablative and non ablative compounds are used and what for?
Thanks in advance!


Very difficult to get empirical evidence of antifouling efficacy. I have previously used International Ultra. Last slipping one of the biocides in Ultra was unavailable and international had reverted to Longlife, both hard antifouling. I mix 8 litre of white with 4 litre of black for a light Beneteau grey colour. (I see that longlife has now been superseded by Ultra 2). Australian antifouling paints are limited to 385gm/litre cuprous oxide by regulation. I may have turbocharged my antifouling this batch with the addition of 100gm/ litre cuprous oxide. Aim is to get a 2 year slipping cycle. Previously could get that from the bottom paint but the Saildrive leg Trilux coating wasn't even good for a season. As a corrosion engineer and anode manufacturer I have dispensed with the Trilux and use the same Longlife on the Saildrive leg. I do monitor the corrosion potential of my leg and use a booster anode when in the pen to extend the life of the ring anode. Propspeed if well applied is good for 2 years.
Initially I sponge wipe the bottom regularly. Then scub with white scotchbrite pad, again keeping the slime off is a big help to longevity of antifouling.

Stockie
NSW, 343 posts
25 Nov 2018 6:40PM
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Shaggy, I have switched from Jotun ablative to Micron 66.
last year was terrible in our area, Port Hacking for fine shell growth. The boat was a mess after 12 -months and I use mine regularly. So far the 66 is looking very good regarding fouling but only 4 month in! I know this is going to sound snake oil, but I am sure the boat is faster through the water, than when the Jotun was first applied in 17
66 is very ablative, more than Jotun, so be carefull wiping it down. Where I have Trilux, near the rudder bearings it is fouled already, sail drive a prop are prop speed and look great.
interesting what Frant is saying.
cheers Richard

shaggybaxter
QLD, 2492 posts
25 Nov 2018 6:06PM
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Select to expand quote
frant said..

shaggybaxter said..
This is an interesting topic. What is the consensus regards antifoul hard or soft compounds for say racing a racer cruiser for SE Qld?
I went for an ablative antifoul last time, and I don't really see how ablative can be slippery compared to hard.
I must be missing some fundamentals. Could anyone classify when ablative and non ablative compounds are used and what for?
Thanks in advance!



Very difficult to get empirical evidence of antifouling efficacy. I have previously used International Ultra. Last slipping one of the biocides in Ultra was unavailable and international had reverted to Longlife, both hard antifouling. I mix 8 litre of white with 4 litre of black for a light Beneteau grey colour. (I see that longlife has now been superseded by Ultra 2). Australian antifouling paints are limited to 385gm/litre cuprous oxide by regulation. I may have turbocharged my antifouling this batch with the addition of 100gm/ litre cuprous oxide. Aim is to get a 2 year slipping cycle. Previously could get that from the bottom paint but the Saildrive leg Trilux coating wasn't even good for a season. As a corrosion engineer and anode manufacturer I have dispensed with the Trilux and use the same Longlife on the Saildrive leg. I do monitor the corrosion potential of my leg and use a booster anode when in the pen to extend the life of the ring anode. Propspeed if well applied is good for 2 years.
Initially I sponge wipe the bottom regularly. Then scub with white scotchbrite pad, again keeping the slime off is a big help to longevity of antifouling.


Frant, I just love you. That's great info, thanks.

Select to expand quote
Stockie said..
Shaggy, I have switched from Jotun ablative to Micron 66.
last year was terrible in our area, Port Hacking for fine shell growth. The boat was a mess after 12 -months and I use mine regularly. So far the 66 is looking very good regarding fouling but only 4 month in! I know this is going to sound snake oil, but I am sure the boat is faster through the water, than when the Jotun was first applied in 17
66 is very ablative, more than Jotun, so be carefull wiping it down. Where I have Trilux, near the rudder bearings it is fouled already, sail drive a prop are prop speed and look great.
interesting what Frant is saying.
cheers Richard



HI Stockie,
I'm glad to hear it, thanks! It's interesting, I think Im seeing the same. Going back and looking at the results since slipping, our light air performance improved since I changed from the previous hard French product (banned in Oz for its toxicity).
I thought the Micron, being an ablative, would be worse in light airs, but my results appear the opposite.

I have a diver dive the boat every month for the race cycle, so it will be interesting to see how long I get compared to Frant's 2 yr target. I'm hoping for 18 months.

nswsailor
NSW, 1423 posts
25 Nov 2018 11:23PM
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Just remember, with ablative antifouling it is important to get the correct thickness on.

For example with Altex No 5 if you use a roller to apply it you need THREE [3] coats [recommended by Altex!] for it to be effective for a period of longer than a year.

I have been using 4 coats and that gives me just over 3 years with a saving of one 4lt tin and a slipping



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"Hempel Silic One anti fouling" started by 2bish