Help choosing my barrier coat system: Interprotect vs. West System vs. Other? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 02-07-2011
Beersmith's Avatar
Sailing to surf
 
Join Date: Nov 2008
Location: St. Augustine, FL
Posts: 208
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
Beersmith is on a distinguished road
Help choosing my barrier coat system: Interprotect vs. West System vs. Other?

After stripping off all of the gelcoat below the waterline, grinding out blisters, and drying the hull for about 8 months; I am nearing the time where I will begin to repair, fair, barrier coat and paint.

I am trying to figure out which products I will be using so I can cost out the whole thing and get organized. I have some questions regarding which brands/systems I should go with at each stage. I am trying to pick the best product for each stage of the bottom job, but I keep reading that I should stick with one system (such as Interlux from fairing all the way to paint). But I also see products like West System or System Three that would require me to use another brand for paint...so a full bottom job with one brand might not be necessary.

For filling, fairing and repairing I had intended on using West System or US Composites epoxy with the necessary fillers for the job. (edit: and I just now discovered Interlux Epiglass to add to the confusion) I will need to do a lot of fairing on the bottom, so would West System be a good choice or should I consider a product like System Three Quickfair, or Interlux Interprotect Watertite Epoxy Filler?

I then intend to add a barrier coat using either West System epoxy + barrier coat filler; or the Interlux Interprotect system. What are the advantages/disadvantages of each barrier coat system? I see many people using Interprotect around the boat yard, but since I will be buying a ton of epoxy for the fairing job and for other uses around the boat I don't see why I shouldn't just use West System barrier coat filler for the job. Is it an inferior product for protecting against water intrusion? I am a little skeptical due to the overwhelming use of Interprotect.

As for bottom paint...I'll come to that at another time and will probably ask around the local area for what works best. I am more concerned about the fairing and barrier coat right now. I just don't want to do a bad job because it cost less (hypothetically) to use System Three fairing, West System barrier coat, then Interlux bottom paint; only to find that the three don't work well together.
__________________
My boat rebuild/sailing blog:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by Beersmith; 02-07-2011 at 10:24 AM.
Reply With Quote Share with Facebook
  #2  
Old 02-07-2011
T37Chef's Avatar
Senior Member
 
Join Date: Oct 2006
Location: Maryland
Posts: 4,102
Thanks: 59
Thanked 28 Times in 26 Posts
Rep Power: 8
T37Chef will become famous soon enough
I used the Petitt product, see more here: http://www.sailnet.com/forums/322678-post.html
__________________
Shawn
Tartan 37 - S/V Windgeist

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Photo by Joe McCary
Reply With Quote Share with Facebook
  #3  
Old 02-08-2011
Senior Member
 
Join Date: Jul 2008
Location: Hershey, PA
Posts: 137
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
harbin2 is on a distinguished road
I don't have the experience of many others here but I did what you are doing two years ago and I'll give you my comments. The boat had a West barrier coat from about 8 years ago (by a PO). I removed some of it and applied 2 coats of Interprotect. I liked the way it mixed and went on. I also liked the color (I used white). I was able to get it discounted. I did little fairing but what I did, I used MAS. I like West products but the MAS is easier to mix in small quantities since it is a 2 to 1 ratio (no pumps, etc.). I did use an Interlux paint but I find it hard to believe the brand of epoxy, barrier coat, and paint makes much of a difference. I feel for the work you have done - especially if you did it yourself - like I did. I have been happy with the results.
harbin2
Islander 30
Reply With Quote Share with Facebook
  #4  
Old 02-08-2011
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,436
Thanks: 6
Thanked 16 Times in 16 Posts
Rep Power: 15
sailingfool will become famous soon enough
I would not worry about different products working together as long as you read and follow their prep rules.

You should use the right product for each job.

Use the Interlux Watertite for divot filling, two layers, the first a rough fill, the second a careful level fill, as it is a bear to sand.

Use West epoxy with microballoons for fairing as it's very easy to spread and sand.

Interprotect 2000 is specialized for barrier coating, it set ups slowly and is easy to roll. West does not make a barrier coating product, although their epoxy doubtlessly makes an excellent barrier coat - if you can get it not to cook up fast, and develop a good roller routine. I have to admit, I never tried to overcome these challenges, the Interprotect to too good at it what it does to struggle with regular epoxy.
__________________
Certified...in several regards...
Reply With Quote Share with Facebook
  #5  
Old 02-08-2011
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
If you use West Systems epoxy and microballoons for the filler, don't forget to coat it with a layer of unthickened epoxy or the microballoons can absorb water. As for the barrier coat, I'd recommend going with Interprotect 2000E.

From a post I wrote previously on applying Interprotect...

Quote:
Originally Posted by sailingdog View Post
Alternating the colors helps a lot with determining where you've painted, but it is also very useful for helping you coat the areas around the boat stands. For instance:

The first layer is gray, since the gelcoat is white, and you can paint right up to the boat stand pads. Then you paint a layer of white, and leave about a two-inch margin of gray paint around the pads... then paint a layer a gray and leave a four-inch margin around the pads or about two-inches of white and two inches of gray showing...and then finish with a layer of white—with a six-inch margin around the pads—with two inches of gray, two inches of white and two inches of gray.

Then when you move the boat stands, you can fill in the pads and layer the paint accordingly... adding gray to cover the white square left by the pad.. then white to cover the gray square, and so on.

Also, by alternating colors, you can see if someone has sanded through the barrier coat when you're prepping the boat for re-painting. If there's an area that is gray or grayish, they've sanded through at least the outermost layer of barrier coat. If you had all white, you wouldn't be able to tell if they had sanded down through the barrier coat as easily—if you had all gray, you could tell they sanded through the barrier coat...but not if they've sanded into it...

I hope this helps clear things up a bit.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #6  
Old 02-08-2011
zz4gta's Avatar
I don't discuss my member
 
Join Date: Aug 2007
Location: Chesapeake Bay
Posts: 2,440
Thanks: 0
Thanked 16 Times in 16 Posts
Rep Power: 8
zz4gta is on a distinguished road
If you are fairing the bottom of your boat, get templates for the keel and rudder as well. This little extra step can add a tremendous amount of performace to your boat. Spend 80-90% of your effort on the foils, the other 10-20% on the rest of your bottom. Do it once, and it'll pay you back year after year. I used west systems epoxy, a little more expensive (buy the pumps if you go this route) but its simple enough to work with. I used silica for filler below the waterline. I had to build up a section of the keel and rudder, then shave 3/16" off the side of the keel. The silica as a filler is very hard to sand, use it sparingly.

I used petite products. You need a mixing attachment on a drill to mix the barrier coat but that's not uncommon. I only wish I had sanded the last coat a bit smoother as this would've allowed the bottom paint to go on smoother. Allow proper drying time. All I did was wipe down the gelcoat with acetone, and roll on the barrier coat.

I'm using white Vivid paint and just thinned it the max allowed and rolled it w/ 1/8" foam rollers. This year I plan to thin and roll and tip for a better/smoother finish. Spraying would be the best, but hell, you're going to re-coat next year anyway.

Maintenance is diving on the boat with a sponge once a month until it gets warm. Then its once a week. When it starts to get chilly, I go back to twice a month, then once a month, then I say screw it when the water hits 50*.
__________________
Merit 25 # 764 "Audrey"
Reply With Quote Share with Facebook
  #7  
Old 02-08-2011
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,234
Thanks: 1
Thanked 24 Times in 24 Posts
Rep Power: 6
tommays will become famous soon enough
Everybody wants about a 20-mil thickness

West likes there 422 barrier coat Additive and there techs that answer question on there Sailing Anchary WEST sponsored Fix It Anarchy section make a compelling argument for its use
__________________
1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #8  
Old 02-08-2011
Beersmith's Avatar
Sailing to surf
 
Join Date: Nov 2008
Location: St. Augustine, FL
Posts: 208
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
Beersmith is on a distinguished road
Thanks a bunch for the information everyone
__________________
My boat rebuild/sailing blog:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #9  
Old 02-08-2011
Beersmith's Avatar
Sailing to surf
 
Join Date: Nov 2008
Location: St. Augustine, FL
Posts: 208
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
Beersmith is on a distinguished road
Quote:
Originally Posted by tommays View Post
Everybody wants about a 20-mil thickness

West likes there 422 barrier coat Additive and there techs that answer question on there Sailing Anchary WEST sponsored Fix It Anarchy section make a compelling argument for its use
well after reading this I'm still torn between West System (using 422 Barrier coat additive) or Interprotect 2000E.

Any other arguments for one or the other?
__________________
My boat rebuild/sailing blog:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #10  
Old 02-08-2011
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Quote:
Originally Posted by Beersmith View Post
well after reading this I'm still torn between West System (using 422 Barrier coat additive) or Interprotect 2000E.

Any other arguments for one or the other?
If you use Interprotect 2000E, you can alternate the colors to make sure you get the proper coverage levels, which is more difficult to do with West system. Also, West System epoxy has amine blush issues.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tips for barrier coating with Interprotect? mrybas Gear & Maintenance 4 08-20-2010 10:45 AM
West System SIX10 kwaltersmi Gear & Maintenance 1 03-18-2010 01:58 PM
West System Pumps. Suberk Gear & Maintenance 9 03-03-2009 11:28 AM
Curious about the West Epoxy System BigAssHam Sailboat Design and Construction 14 11-22-2007 09:48 PM
WEST SYSTEM Boys Bilge_Scum General Discussion (sailing related) 0 07-07-2001 04:30 AM


All times are GMT -4. The time now is 02:32 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.