Soda Blasting

Downrigga

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36' NB
So I am soda blasting my hull this week. I was wondering if anyone has a recommendation for a good barrier coat. I was also wondering how thick it should be? Someone mentioned 10mm is a good barrier. Any thoughts would be appreciated.
 

Keelboater

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Clinton Harbor
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35' Bruno & Stillman
I've used both Sea Hawk Tuff Stuff and Interlux 2000 barrier coats on various projects. There are pros and cons to each, but in the end a 10 mil (not millimeters!) dry thickness is desired and both work good with no flaking or peeling.

Sea Hawk - Only 2 coats required for a much shorter weather window. But the nap roller they recommend to obtain that thickness in two coats will leave a somewhat textured surface, almost to the point where you might actually consider sanding it a bit smoother if you are hoping for a little speed increase. You can use a finer nap roller to get a smoother finish, but then you will require a third or maybe even a fourth coat to get that 10 mil thickness.

Interlux 2000 - They are up front with their dreaded 5 coat requirement and a much larger weather window is required. More labor intensive but it yields a much smoother surface.

Both work very well, but in my opinion if you are hoping and praying for that extra 1/2 to 1 knot bonus speed increase after all the trouble of stripping the entire bottom, Interlux is the way to go. But with either product the end result should be that 10 mil thickness. I did choose to go with Interlux on my Bruno project simply because I'm hoping to gain any kind of cruise speed I can possibly get behind that whopping 260 HP CAT. ;)
 

PatriciaLynn

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Cape E
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Repco
How are you soda blasting? Renting the equipment? I am looking to do this in 18 months or so, would like to get feedback on how, where, how much the equipment is.

I got quotes for rentals of a big air compressor and media blasting unit for about $500 each for a week with all of the fees. Is that what you all are seeing?
 

BillD

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Portsmouth NH, boating out of the mighty Merrimack
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25 Terry Jason with Cummins 370 power
We use the Seahawk Tuff Stuff exclusively in our yard. We can do the (2) coats and (1) coat of bottom paint all in on one work day.

I had the bottom of 1989 25 Terry Jason "bead blasted".......left a nice clean 80 grit surface on the gel coat. Used Seahawk Systems barrier and top coat black.

Nice smooth bottom on her ! :D
 

goin4broke

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Mystic,CT
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35 Foot Terry Jason (Currently undergoing finishing touches)
Used Interlux high build on the TJ35. Prep was a PITA getting all the mold release wax off but, application was fairly easy. There was a base paint coat (anti fouling) requirement but it is more flexible than the multi coat stuff. We'll see how it performs if it ever hits the water. :D
 

BillD

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25 Terry Jason with Cummins 370 power
Used Interlux high build on the TJ35. Prep was a PITA getting all the mold release wax off but, application was fairly easy. There was a base paint coat (anti fouling) requirement but it is more flexible than the multi coat stuff. We'll see how it performs if it ever hits the water. :D
you'll get there !
 

Downrigga

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Harwichport MA
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36' NB
How are you soda blasting? Renting the equipment? I am looking to do this in 18 months or so, would like to get feedback on how, where, how much the equipment is.

I got quotes for rentals of a big air compressor and media blasting unit for about $500 each for a week with all of the fees. Is that what you all are seeing?
A guy that works for me has a state of the art blasting machine. Soda blasts with water. Coolest thing ever. No mess no dust. All mounted on a trailer. Let me know when you are ready. I'm sure I could help you out. Doing mine in the am and he says he will be done in less than 3 hours.
 

WoundUpMarine

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26 Duffy, 14 Holland
A guy that works for me has a state of the art blasting machine. Soda blasts with water. Coolest thing ever. No mess no dust. All mounted on a trailer. Let me know when you are ready. I'm sure I could help you out. Doing mine in the am and he says he will be done in less than 3 hours.
Where is he located? I have a small project for him :)
 

cb34

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If he is ever in the Newburyport area he should swing by the boatyard and say hello. We do 3-4 bottom jobs a year and are always looking for new, more green friendly approaches to the striping process.
What are you guys building in the yard?
 

ThePartsGuy

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Feb 11, 2018
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NEWBURYPORT MA
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www.merri-maryachtbasin.com
What are you guys building in the yard?
A brand new ship store with expanded capacity. I'm excited because I will have a huge modern parts room and warehousing space. We will also have classroom space on the second floor to run our free clinics as well as additional fee based hands on seminars on various boat systems.

Although in cramped spaces till after haul season we are still fully open to the public.
 

osprey47

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Annapolis, MD
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BHM 36 w/ Yanmar 6LYA-STE
Have used the Pettit barrier coat. 3 coats (alternating black, grey, black) with goal of 3mm thickness. Then 2 coats of antifoul. We had ground, filled, faired many gel-coat blisters. Four years later, bottom was like new.
 
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