Author Topic: Fiberglass treatment?  (Read 3058 times)

280plus

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Fiberglass treatment?
« on: May 09, 2010, 08:18:45 AM »
My fairly expensive extension ladder is starting to shed fibers. Can I just paint it with something to seal it?
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geronimotwo

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Re: Fiberglass treatment?
« Reply #1 on: May 09, 2010, 08:26:36 AM »
buy a quart of epoxy, and brush it on. it should not only seal, but bind the fibers for strength. 
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280plus

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Re: Fiberglass treatment?
« Reply #2 on: May 09, 2010, 08:32:47 AM »
That's what I was thinking but the ladder people say no. I already cut one up and disposed of it on their say so. Kind of hated doing it but it was a bit tweaked as well so away it went. This one is a nice 300# / 28' and it's not that old. Spends all it's time in the weather though.  =|
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dogmush

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Re: Fiberglass treatment?
« Reply #3 on: May 09, 2010, 08:46:16 AM »
I've repaired ladders and stuff sheding fibers with Fiberglass resin.  Paint on two good coats, mixed kinds hot to make sure it kicks.
The local marine stores around here sell resin by the gallon, and last I checked auto parts stores/auto body shops would sell it too.


The ladder makers will never take liability for telling you it's OK to repair a ladder.

280plus

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Re: Fiberglass treatment?
« Reply #4 on: May 09, 2010, 08:54:53 AM »
Quote
mixed kinds hot to make sure it kicks
kinda hot? Which means... more catalyst? Is there a catalyst with this stuff?
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Re: Fiberglass treatment?
« Reply #5 on: May 09, 2010, 09:02:59 AM »
Duct tape.
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Hawkmoon

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Re: Fiberglass treatment?
« Reply #6 on: May 09, 2010, 09:13:11 AM »
Be sure to use epoxy resin, not polyester. Which means you'll probably have to get it at a boat store, not an auto parts place.

Yes, it is two parts. The resin itself, and the catalyst. Mix according to instructions. Make it "hotter" than the instructions and it'll start smoking in the can, and set up right around your brush before you get halfway done. Do not apply in bright sunlight. And do not ask me how I know this.
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dogmush

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Re: Fiberglass treatment?
« Reply #7 on: May 09, 2010, 09:14:38 AM »
kinda hot? Which means... more catalyst? Is there a catalyst with this stuff?

Yeah, sorry.  You're looking for this stuff.  Bondo brand also makes one (that's the parts store one).

It includes a liquid hardener (MEKP if you're curious) and is mixxed at about 1 ounce catylist:1 Quart resin.  This varies depending on temp, humidity, and desired cure time.  I mix mine "hot" because I like it to kick faster, and if I don't mix it perfectly it gives me a margin of error. Note, that's a *little* hot, like 1.5 oz/qt.  If you mix it too hot, it'll 1. kick before you're done or, 2. start a fire in the paper mixxing cup (don't ask).

This stuff is significantly stronger, and better then Epoxy*.  It'll work well, but is a little less forgiving of application errors.  Also if you haven't worked with 'glass before, wear latex gloves, plan on throwing out all brushes and mixxing containers when done, ensure good ventilation, and if you're at all sensitive to fumes (or inside) a resperator ain't a bad idea.

The resin will flow better then epoxy, so it's going to get into the strands and bond them better, and it's probably exactly what they used in the factory so it should set up nice.  

When it's dry, scuff with 320grit and paint the color of your choice.

ETA *to clarify since Hawkmoon brought up Epoxy resins, "epoxy" in that sentance refers to the stuff you can buy at in Gal. ammounts Home Depot, which is actually Epoxy paint.  Epoxy Resin is a diferent animal used in making composite stuff.  It tends to be stronger and less brittle then polyester resin, as well as more expensive, and less forgiving to work. Epoxy Resin can be mixed with Milled Glass fibers to make it's own structure, where Poly usually needs glass mat or blown fibers, and a mold to hold structure.
« Last Edit: May 09, 2010, 09:25:29 AM by dogmush »

dogmush

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Re: Fiberglass treatment?
« Reply #8 on: May 09, 2010, 09:16:28 AM »
Now see Hawk, I'd use Poly resin because it flows better.  Epoxy's great if it needs to stand on it's own, but the glass is already there in the ladder, he just needs to rebond it.  Poly's alot cheaper as well.

(although truth be told both will probably work fine)

ETA: If one wanted to get into glassing or composites These guys seem to have a good selection, and decent prices.
« Last Edit: May 09, 2010, 09:19:38 AM by dogmush »

geronimotwo

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Re: Fiberglass treatment?
« Reply #9 on: May 09, 2010, 09:21:51 AM »
epoxy will bind better to fiberglass than fiberglass resin will.  how hot you want the mix will be determined by the weather.  the ladder should be clean and dry. don't mix too much at once (especially with a hot batch) or you will find yourself with a very well reinforced cup.  an epoxy with uv inhibitors can be found at a marine strore, or online.  the "west" system epoxies are one of the best, but any brand will usually work fine they just aren't as consistent with the mix.
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280plus

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Re: Fiberglass treatment?
« Reply #10 on: May 09, 2010, 09:45:41 AM »
Ooo, lots of "don't ask me how I know this" stuff. I do appreciate the pointers!  =D
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Hawkmoon

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Re: Fiberglass treatment?
« Reply #11 on: May 09, 2010, 02:30:42 PM »
Now see Hawk, I'd use Poly resin because it flows better.  Epoxy's great if it needs to stand on it's own, but the glass is already there in the ladder, he just needs to rebond it.  Poly's alot cheaper as well.

(although truth be told both will probably work fine)

Trouble is, I'm a sailor. I've seen too many fiberglas hulls (and too many polyester resin repairs) delaminate for me to have any faith in polyester resins. Yeah, I've made repairs to an old canoe using polyester resin from Sears and it got the job done and kept the water on the wet side, but for a ladder that's going to be (hopefully) supporting me at heights from which I probably don't want to fall, I'd rather not be thinking about potential delamination.
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bedlamite

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Re: Fiberglass treatment?
« Reply #12 on: May 09, 2010, 02:37:17 PM »
A plan is just a list of things that doesn't happen.
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Re: Fiberglass treatment?
« Reply #13 on: May 09, 2010, 03:15:49 PM »
Just make sure use use a clear resin.
Its ok in OSHA land if you treat wood or fiberglass ladders, but it must be clear as to not hide any cracks.
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280plus

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Re: Fiberglass treatment?
« Reply #14 on: May 09, 2010, 06:45:09 PM »
OSHA who?  =D

Thakls all, as usual very useful info here. Best board on the net!  ;)
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Tallpine

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Re: Fiberglass treatment?
« Reply #15 on: May 09, 2010, 08:00:14 PM »
OSHA who?  =D

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Re: Fiberglass treatment?
« Reply #16 on: May 09, 2010, 08:32:30 PM »
OSHA who?  =D

Thakls all, as usual very useful info here. Best board on the net!  ;)

I did not know if you were using them for a business or pleasure.
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280plus

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Re: Fiberglass treatment?
« Reply #17 on: May 10, 2010, 06:29:34 AM »
Business but I work alone. Most of the time anyways. I have to be my own OSHA and do my best not to kill myself. So far so good.  :laugh:
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