Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60 - Page 6 - SailNet Community

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  #51  
Old 04-23-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

I sanded the bottom down to the barrier coat, applied Interprotect 2000 down one side and up the other. Then within 15-20 minutes of completing that, I started my application of SR-60. Three coats SR-60 in all.

The boat has been in the water for over 18 months now and still looks great with no hard growth(Carrabelle, FL). After the first year, I found that I need to wipe off the slime using a microfiber glove. I have wiped it down a few times now, and I am hoping to get another 12-18 months at least before another application of SR-60.

Here is the link to the Dollar General microfiber glove I use:
DG Auto Microfiber Car Wash Mitt - Auto Cleaning - Dollar General
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  #52  
Old 04-23-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

Quote:
Originally Posted by 4arch View Post
Salty,

I used 2 coats of SR-60 over 2000e last month and "hot coated" the first coat of SR-60. I didn't have any issues. The boat's back in the water now though, so if any long-term issues come up, I won't know for a while.

I'd be curious to check out the literature you were looking at if you have a link? I found Pettit's TB-Z155 Bottom Painting Bare Fiberglass technical bulletin advised applying SR-60 to their 6999 Sandless Primer tack-free. But as far as I can tell, the 6999 is not an epoxy product. Their 4700/4701 looks to be a 2-part epoxy barrier coat more similar to the 2000e. I couldn't find any info specific to SR-60 over the 4700/4701.
4arch : You are right! I just checked and I guess I had a brain fart. The requirement for tack free for the SR60 was for the 6999 Sandless Primer. The Pettit Protect epoxy primer has times to wait before coating with bottom paint. No distinction is made for any Pettit bottom paint.
3. Apply the first coat of Pettit antifouling paint overthe last coat of epoxy within the specified overcoating schedule shown
below.
Hull Temperature To Bottom Paint(Hours)
90° F 3*‐*6
70° F 5*‐*8
50° F 7*‐*10
If these dry times are exceeded, you must sand the last coat of epoxy thoroughly with 80 grit production paper before applying antifouling paint or apply another coat of epoxy if recoat window has not been exceeded. Do not apply antifouling paint before the minimum dry time, as mud cracking of the antifoulingmay result.


This seems similar to what Interlux says for Interprotect 2K. Thanks for catching my error! I was about to throw in the towel and just use Micron Extra as I really don't want any adhesion problems. FWIW, Interlux seems to have really good customer support between their reps and the online help forum. Pettit has also been responsive in returning emails, though the responses are a bit light on detail. Pettit customer service did say that the SR-60 will bond well with the barrier coat. To be fair, I've been asking both companies a question about how their product will work with another companies product.
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  #53  
Old 04-23-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

Quote:
Originally Posted by Maine Sail View Post
I used Horizons as the "hot coat" layer at the advice of Pettit. Horizons is the same base co-polymer paint without the slime blocker and a little less copper (equal to Ultima SR40). They suggested the non-slime blocker as the hot coat/tracer then you can switch to Ultima SR. This went over IP2KE 6 years ago and there are zero adhesion or build up issues. Steve Miller our local rep up here has recently told me that hot coating with either SR40 or SR60 is not a problem at least with their barrier coat. He would not comment on IP2KE which is what I used.

Keep in mind that as copper content goes up, and slime blockers get added, coverage per gallon goes down slightly. SR60 covers about 400 sq ft. and Horizons covers about 500 sq ft., SR 40 about 450 sq ft. SR60 has a different solvent than SR40..

Just finished applying SR60 and it is tough to cover my hull with 1 gal but I can easily do it with SR40. SR40 is the exact same paint as West Marine PCA GOLD...
Main: It was your posts specifically that prompted me to ask both Interlux and Pettit about whether it was better to hot coat the barrier coat with a non-slime inhibitor paint. Both said it's fine. Go figure huh. Either they have changed their thinking or you spoke to someone at Interlux/Pettit that knew either more or less than those I talked to. At this point I think I'm going with the SR60 over Interprotect 2K hot coating at thumbprint tacky. It seems others have done this with good results (so far). It seems that most are happy with SR60 in general. I hardly ever go faster than 6 kts, so your logic regarding Ultima SR 60 vs. Micron Extra makes sense.
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Old 04-23-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

Quote:
Originally Posted by dreuge View Post
I sanded the bottom down to the barrier coat, applied Interprotect 2000 down one side and up the other. Then within 15-20 minutes of completing that, I started my application of SR-60. Three coats SR-60 in all.

The boat has been in the water for over 18 months now and still looks great with no hard growth(Carrabelle, FL). After the first year, I found that I need to wipe off the slime using a microfiber glove. I have wiped it down a few times now, and I am hoping to get another 12-18 months at least before another application of SR-60.

Here is the link to the Dollar General microfiber glove I use:
DG Auto Microfiber Car Wash Mitt - Auto Cleaning - Dollar General
Glad that it's working for you. This is the same recipe I plan to follow. I bit scary mixing products from different manufactures, but this seems to be the best logical approach. Thanks for the tip on the mitt. Seems a good way to wipe down with out taking off too much paint while you're doing it.
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Old 06-23-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

Quote:
Originally Posted by 4arch View Post
I used 2 coats of SR-60 over 2000e last month and "hot coated" the first coat of SR-60. I didn't have any issues. The boat's back in the water now though, so if any long-term issues come up, I won't know for a while.
Update: I went for a swim while at anchor this weekend and had the first good up-close look at the SR-60 since launch back in early April. The boat has been sailed almost every weekend since, but not yet had the bottom cleaned. Slime was low to moderate, less than what might normally be expected after 2 1/2 months in the water. Unfortunately hard growth has started particularly on the aft quarters and top of the rudder. There don't seem to be any issues with adhesion. All in all it seems to be doing moderately well, but I was surprised to see hard growth starting so soon.
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  #56  
Old 06-23-2013
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Old 06-24-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

Agree, we just had the diver down on our 3 year old paint and the prop need work, but the paint had little growth he said. Must be something in the water across the river.

Dave
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  #58  
Old 06-24-2013
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Re: Bottom paint: Micron Extra/CSC, Pettit Ultima SR-40/SR-60

Super aggressive mutant barnacles caused by all the junk the steel plant dumped in the river?
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