HELP! SK14 bottom fairing, what to do now?

Power Boats only. Please include the boat type in your question.

wannabatc
Frequent Poster
Frequent Poster
Posts: 42
Joined: Fri Jul 08, 2016 5:04 pm
Location: winston salem, nc

Re: HELP! SK14 bottom fairing, what to do now?

Post by wannabatc » Thu Oct 11, 2018 10:39 am

Thanks for all the help and sharing knowledge/experience. Capt AB great details on the recipe for the graphite coating. Anybody have any details on the fairing recipe? I’ve got all these phenolic micro balloons hate to go to waste.

Of course when you factor in the cost of the wasted epoxy and the TIME to correct this mess we seem to have a classic case of“penny saved dollar spent”....

Would definitely give my vote for Quick fair for newbies based on my experience.

narfi
* Bateau Builder *
* Bateau Builder *
Posts: 1162
Joined: Tue Jun 07, 2016 6:55 pm
Location: Bush Alaska

Re: HELP! SK14 bottom fairing, what to do now?

Post by narfi » Thu Oct 11, 2018 1:39 pm

The phenolic micro balloons work great for fairing. The BBC blended mix adds Silica thickener to it which helps on vertical surfaces, but is not needed, just makes things easier.

Think of looking at it under a microscope, the balloons in resin is very slippery and will run/flow/drip/etc... because it is round objects in resin. This is fine on horzontal surfaces, but on vertical surfaces it is more difficult because you want it to stick to the sides and it just rolls down instead. This is where the Silica helps.

You already have the microballoons, so if it was me, I would do this,

Use them for fairing all my horizontal surfaces and test it on vertical surfaces, you may not have any problem at all.
If I found it doesnt work well enough for my needs on the vertical surfaces, I would either buy a blended mix for that, or buy just silica thickener and blend my own with the balloons.

Either way, you are learning, and while clean up will be a lot of work now, it will make for a great story when you are done, and you will be looking at your boat with pride.

User avatar
OrangeQuest
Very Active Poster
Very Active Poster
Posts: 780
Joined: Tue Aug 28, 2018 1:14 pm
Location: Houston, Texas

Re: HELP! SK14 bottom fairing, what to do now?

Post by OrangeQuest » Thu Oct 11, 2018 3:30 pm

Could wood flour be used as the thickener? And if yes, ya got any wood flour? :)

Eric1
Very Active Poster
Very Active Poster
Posts: 2670
Joined: Tue Aug 19, 2014 3:17 pm
Location: Spartanburg,S.C.

Re: HELP! SK14 bottom fairing, what to do now?

Post by Eric1 » Thu Oct 11, 2018 4:55 pm

OrangeQuest wrote:
Thu Oct 11, 2018 3:30 pm
Could wood flour be used as the thickener? And if yes, ya got any wood flour? :)
It could but why? It is much more difficult to sand.

User avatar
OrangeQuest
Very Active Poster
Very Active Poster
Posts: 780
Joined: Tue Aug 28, 2018 1:14 pm
Location: Houston, Texas

Re: HELP! SK14 bottom fairing, what to do now?

Post by OrangeQuest » Thu Oct 11, 2018 5:07 pm

Eric1 wrote:
Thu Oct 11, 2018 4:55 pm
OrangeQuest wrote:
Thu Oct 11, 2018 3:30 pm
Could wood flour be used as the thickener? And if yes, ya got any wood flour? :)
It could but why? It is much more difficult to sand.
If he has wood flour but no silica but still use the phenolic balloons as the filler. We are talking only enough to keep it from sagging, how much more difficult can it make it? Would it be the same as making wood flour/epoxy putty? :doh:

I used expanding foam dust as a filler today, let you know tomorrow how that turns out. 8O

Jaysen
* Bateau Builder *
* Bateau Builder *
Posts: 3393
Joined: Wed Aug 05, 2015 7:59 am
Location: St Helena Island, SC

Re: HELP! SK14 bottom fairing, what to do now?

Post by Jaysen » Thu Oct 11, 2018 5:11 pm

Wood flour is a lot harder to sand. I’ve done it. If it’s all you have then ok, but if you have he option to use something else ... do it.

I’d expect the foam to be brittle. Let us know how it turns out.

fallguy1000
Very Active Poster
Very Active Poster
Posts: 2057
Joined: Tue Jan 12, 2010 12:25 am

Re: HELP! SK14 bottom fairing, what to do now?

Post by fallguy1000 » Thu Oct 11, 2018 5:38 pm

Weight
12 oz epoxy(vol)
10g cabosil
90g balloons

This batch is huge!

Vol
12oz epoxy
9oz cabosil
27oz balloons

Use only 3oz epoxy batches for smaller jobs or divide four.

So
3oz epoxy(vol)
2.5g cabosil
22.2g balloons
Vol
3oz epoxy
2 1/4 oz cabosil
6.75oz balloons

If these don't stand up, add a bit more balloons. I have not tested the small batches. Things can change a bit when you shrink qty.
Last edited by fallguy1000 on Thu Oct 11, 2018 5:52 pm, edited 1 time in total.
My boat build is here -------->

viewtopic.php?f=12&t=62495

Jaysen
* Bateau Builder *
* Bateau Builder *
Posts: 3393
Joined: Wed Aug 05, 2015 7:59 am
Location: St Helena Island, SC

Re: HELP! SK14 bottom fairing, what to do now?

Post by Jaysen » Thu Oct 11, 2018 5:46 pm

I did batches that size. But I had gross amounts of fairing (tape edges, huge concave sections of seams, etc). Unless you can get it all down fast smaller is the I love you way to go.

BYW I’d take fallguy advice like gospel until you are 100% certain you’re method works better for you.

fallguy1000
Very Active Poster
Very Active Poster
Posts: 2057
Joined: Tue Jan 12, 2010 12:25 am

Re: HELP! SK14 bottom fairing, what to do now?

Post by fallguy1000 » Thu Oct 11, 2018 5:54 pm

You will find this is not as creamy as Quikfair, but works nice for a first pass/bulk repair.
My boat build is here -------->

viewtopic.php?f=12&t=62495

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest