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What's your favorite fairing filler?

Old 04-13-2016, 04:14 AM
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Default What's your favorite fairing filler?

Over glass/epoxy. I've got some seams on a pilot house build to fill/fair. I was gonna use the Total Boat stuff but figured I'd ask. Above the waterline obviously so finish and ease of use is priority. Thanks?
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Old 04-13-2016, 04:59 AM
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I like Alexseal 202
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Old 04-13-2016, 10:35 AM
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Default fairing

west microlite+microballoons but the 202 is nice too
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Old 04-13-2016, 06:02 PM
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The total boat takes for ever to cure, but on the flip side you can mix a good bit and have 30min to spread it.
I tried mixing a little more hardener than base for a quick cure and it gets rubbery.

sands really well when mixed correctly and has zero issue with pin holes.

That My experience with it anyways....
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Old 04-14-2016, 03:59 AM
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Originally Posted by WhiskeyRiver View Post
The total boat takes for ever to cure, but on the flip side you can mix a good bit and have 30min to spread it.
I tried mixing a little more hardener than base for a quick cure and it gets rubbery.

sands really well when mixed correctly and has zero issue with pin holes.

That My experience with it anyways....
Thanks for the reply Whiskey. What temps were you working in and how long before its sand able? What's important you really answered in that it has no pin holes and sands well. Edges that don't fair require more primer, more sanding and overall more work.
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Old 04-14-2016, 06:26 AM
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3M glass bubbles!
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Old 04-14-2016, 06:46 AM
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Originally Posted by WhiskeyRiver View Post
The total boat takes for ever to cure, but on the flip side you can mix a good bit and have 30min to spread it.
I tried mixing a little more hardener than base for a quick cure and it gets rubbery.

sands really well when mixed correctly and has zero issue with pin holes.

That My experience with it anyways....
FYI, mixing an epoxy at anything but the correct mix ratio just won't work. You will find many consequences of incorrect mix, not limited to rubberiness, cracking and water absorption.
A 3-4 hour sand time at 80F is about the best you'll see for an epoxy fairing compound.
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Old 04-14-2016, 01:26 PM
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Originally Posted by Pettit Marine Paint View Post
FYI, mixing an epoxy at anything but the correct mix ratio just won't work. You will find many consequences of incorrect mix, not limited to rubberiness, cracking and water absorption.
A 3-4 hour sand time at 80F is about the best you'll see for an epoxy fairing compound.


Once I realized it wasn't setting correctly I went back to the 1:1

Luckily it was an experiment and wasn't applied to the boat.


Mayhem,

Typical temp has been about 70*, 5 hours plus or minus to sand really well.
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Old 04-15-2016, 03:54 AM
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Originally Posted by Pettit Marine Paint View Post
FYI, mixing an epoxy at anything but the correct mix ratio just won't work. You will find many consequences of incorrect mix, not limited to rubberiness, cracking and water absorption.
A 3-4 hour sand time at 80F is about the best you'll see for an epoxy fairing compound.
Your Fairing compound is held in very high regards around the web as light and easy to sand........but obviously it's quite a bit more expensive than others. Are there other, less obvious advantages to the Pettit EZ fair?
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Old 04-15-2016, 04:43 AM
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I'm a big fan of glass balloons mixed in w/ standard epoxy. Quick Fair is also nice because it's pre-mixed but you pay for the convenience. I've never used Pettit but I know their brand is highly recommended so I'd wager their fairing compound is pre-mixed which will be much easier to use and you'll have more consistency batch to batch.
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Old 04-15-2016, 09:02 AM
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Originally Posted by Mayhem13 View Post
Your Fairing compound is held in very high regards around the web as light and easy to sand........but obviously it's quite a bit more expensive than others. Are there other, less obvious advantages to the Pettit EZ fair?
As far as I know, our Fairing Compound in general is priced in line with other high end fairing compounds like Awlfair and Alexseal 202 and Interlux Watertite. Correct me if I'm wrong. Also, the EZ-Fair "quart" kit actually contains 1.5 quarts of material so the pricing can appear a little worse than it actually is.

As far as the product goes, it's easy to spread, cures fast, is extremely lightweight, sands easily and is 100% waterproof.
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Old 04-16-2016, 04:50 AM
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Great info here! I know this is a debate on which is the BEST but I'll throw in my 2 cents. Based on price and ease of use.

I've used 3m stuff, 202 and I've also used system three epoxy fairing putty before and it all works equally well but it gets very expensive real quick if you have a big job of fairing ahead of you.

You can get a 5 gallon jug of lightweight fairing putty for 160 bucks from FGCI or US Composites. Its poly based and uses MEKP as a catalyst. Obviously if you are building a boat with epoxy this won't be a good option and you are bound to the epoxy based products. If you're using poly products then this is the way to go. With the amount you save on buying this 5 gallon jug, you can buy some high build primer to fill in any small imperfections. You will need high build primer no matter which filler you use because they all have pin holes when you start sanding, its the nature of the beast. Air bubbles get mixed in when the stuff is mixed before use. They are all about the same to sand as well. The best thing you can do to make sure any of these fillers sand well is to mix very thoroughly. A lot of guys who don't like certain fillers fail to mix the products all the way through and the filler does not cure completely at the surface which will end up gumming up your sand paper and make you hate life while sanding until you get it figured out.

Another thing that will help with fairing is a badass air powered 5 or 6 inch sander as well as some well designed longboards. It all sucks to do but there are definitely ways to minimize the suck and end up with a quality finish.

Good luck with whatever project you are working on.
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Old 04-17-2016, 06:16 PM
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As far as fairing compounds go, you cant beat EZ fair. It is easy to use, sand, etc. have used it many times in the past on a variety of projects and no complaints. My 2 bits.
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Old 04-22-2016, 01:14 AM
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So I thought I'd give the Total Boat stuff a shot and I gotta say I'm very happy with the results. The two colors really help with letting you know it's mixed well which goes towards an earlier post mentioning pin holes......and after examining all of my test patches I couldn't find ANY pinholes! The stuff sands very well but I would say that if you want to get a feathered edge worthy of paint and primer, be sure to use 320 grit paper or softer. 220 is too rough for final sanding and the edge lifts. It didn't appear to suffer an shrinking either so I didn't need a second application, even on an area that was off nearly .185" in thickness!

I also mixed some West Microlight with epoxy and did a few test patches as well. Goes on really nice, a bit smoother in application than the Total Boat but MUCH more difficult to sand! I had to use 150 paper to make a dent in the stuff which didn't bode well for the areas around the patch that were already primed with epoxy prime coat which sanded off well before the filler. But in fairness to the epoxy mix, it is a bit easier to apply and doesn't pull out while working it with a squeegee.

So strictly for the labor savings, the Total Boat fairing filler is a win for me. I only purchased a small amount, not enough for the whole project so I'll order the Pettit next and compare the two. If there's time and a need, I'll try a bit of the Interlux filler as well.
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Old 04-24-2016, 06:38 PM
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Quick Fair from System 3 is also very good as an epoxy but 3M Premium polyester filler blows epoxy into the weeds if you need/want to work fast
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Old 04-24-2016, 08:18 PM
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Total boat... Is good stuff also like Petit.

I did my current build with total boat, good results, didn't gum up the paper.
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Old 04-25-2016, 12:23 AM
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Originally Posted by Chaps View Post
Quick Fair from System 3 is also very good as an epoxy but 3M Premium polyester filler blows epoxy into the weeds if you need/want to work fast
I hear yah on working fast with polyester.......unfortunately being a novice at working the fairing, I need the added setup time. Generally anything 3M does, they do very well. Also given my core is wood, I wanted the extra water protection epoxy provides
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Old 04-25-2016, 10:33 AM
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3M premium filler
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Old 04-26-2016, 11:40 AM
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fair so light is very good to work with
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Old 02-12-2019, 02:50 AM
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Call me old fashioned but I steer clear of the lighter and fast cure “ putty’s”

i use pure epoxy and add us composites fairing mix. Some pin holing and overnight cure but I know it’s mostly good epoxy. Sure the others work fine just my pref.
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