what doesn't fiberglass bond to?

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Odyssey...@aol.com

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Feb 5, 2012, 10:30:43 AM2/5/12
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while the Tiger was getting a face lift yesterday, we were talking about when i glass it and the holes for the road wheel arms. He said i should drill them first (all ready figured that), but suggested i use a plug afterwards where i drilled and then remove the plug after glassing. he thinks the resin won't bond to heavy packaging tape.
 
i do like the idea of marking and drilling everything while the hull is still bare and square before glassing as then it would be just a matter of minor cleaning up afterwards and inserting the oil-lite bushings (come to think of it, i guess i should put together my shopping list for the rear axles and bearings - front will get the adjustable tensioner arms)
 
Chris

Jason

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Feb 5, 2012, 2:21:38 PM2/5/12
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Resin will bond to most everything, plug with wax, wax paper can be peeled with limited results... Also it won't bond to milk jug plastic
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Date: Sun, 5 Feb 2012 10:30:43 -0500 (EST)
Subject: [TANKS] what doesn't fiberglass bond to?

while the Tiger was getting a face lift yesterday, we were talking about when i glass it and the holes for the road wheel arms. He said i should drill them first (all ready figured that), but suggested i use a plug afterwards where i drilled and then remove the plug after glassing. he thinks the resin won't bond to heavy packaging tape.
 
i do like the idea of marking and drilling everything while the hull is still bare and square before glassing as then it would be just a matter of minor cleaning up afterwards and inserting the oil-lite bushings (come to think of it, i guess i should put together my shopping list for the rear axles and bearings - front will get the adjustable tensioner arms)
 
Chris

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Odyssey...@aol.com

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Feb 5, 2012, 2:34:07 PM2/5/12
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In a message dated 2/5/2012 2:21:45 P.M. Eastern Standard Time, pil...@comcast.net writes:
Also it won't bond to milk jug plastic
didn't know that. guess I could try to cut, heat and form it onto a piece of wooden dowel.
 
i was even wondering about delon (sp?)
 
Chris

Jason

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Feb 5, 2012, 2:56:11 PM2/5/12
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Delrin will be a very weak bond, easily peelable. Milk jug plastic is easily formed, with some heat, a heat gun for instance, heat seal the delrin and you'll be fine
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Date: Sun, 5 Feb 2012 14:34:07 -0500 (EST)
Subject: Re: [TANKS] what doesn't fiberglass bond to?

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Odyssey...@aol.com

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Feb 5, 2012, 11:07:24 PM2/5/12
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sorry, i meant that delrin by itself.
 
but i will keep the milk jug idea in mind
 
Chris

Jason

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Feb 6, 2012, 12:52:00 AM2/6/12
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Delrin on its own won't bond well to the resin. By heat sealing it I mean take a torch and run the flame over it quickly to smooth over and small grooves or scratches.
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Date: Sun, 5 Feb 2012 23:07:24 -0500 (EST)
Subject: Re: [TANKS] what doesn't fiberglass bond to?

sorry, i meant that delrin by itself.
 
but i will keep the milk jug idea in mind
 
Chris

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Gary Warren

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Feb 6, 2012, 9:59:55 AM2/6/12
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I would suspect that UHMW would also work well, nothing seems to bond to
it very well.

Gary

Odyssey...@aol.com

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Feb 6, 2012, 10:03:33 AM2/6/12
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In a message dated 2/6/2012 12:52:07 A.M. Eastern Standard Time, pil...@comcast.net writes:
Delrin on its own won't bond well to the resin. By heat sealing it I mean take a torch and run the flame over it quickly to smooth over and small grooves or scratches.
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take away any nick that would allow the resin to get a bite in - got it 
 
Chris

Odyssey...@aol.com

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Feb 6, 2012, 10:04:45 AM2/6/12
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what's that?
 
Chris

pil...@comcast.net

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Feb 6, 2012, 10:23:25 AM2/6/12
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UHMW, ultra high molecular weight   polyethylene(milk jug plastic)

From: Odyssey...@aol.com
To: rctank...@googlegroups.com
Sent: Monday, February 6, 2012 9:04:45 AM

Subject: Re: [TANKS] what doesn't fiberglass bond to?

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Odyssey...@aol.com

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Feb 6, 2012, 10:24:33 AM2/6/12
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In a message dated 2/6/2012 10:23:33 A.M. Eastern Standard Time, pil...@comcast.net writes:
UHMW, ultra high molecular weight   polyethylene(milk jug plastic)
thanks
 
Chris

SmithD

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Feb 6, 2012, 5:59:57 PM2/6/12
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Coat the plug with mold release. It will slide right out.
 
DSmith
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Odyssey...@aol.com

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Feb 6, 2012, 8:08:33 PM2/6/12
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In a message dated 2/6/2012 6:00:16 P.M. Eastern Standard Time, smi...@myfairpoint.net writes:
Coat the plug with mold release. It will slide right out.
 
DSmith
when you say mold release, you mean that Petroleum jelly, mineral spirits mixture or something else, or something like Ease Mann 2000?
 
Chris

SmithD

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Feb 7, 2012, 12:28:26 AM2/7/12
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I'm not sure what mold release is made out of. What I have used feels like soft wax after the solvents evaporate. It prevents fiberglass canoes from sticking to fiberglass molds. It also prevents fiberglass molds from sticking to the wooden plug when the mold is made.
 Fiberglass mold release should be available from the same place you bought your glass and resin. 
 
DSmith
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pil...@comcast.net

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Feb 7, 2012, 9:14:49 AM2/7/12
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Just a thought but you are simply fiberglassing over the wooden hull of the tiger right? if that is the case I would recommend that you NOT drill th e axel holes first and instead just lay down a flat sheet of glass  and drill everything after its hardened. fitting the glass over all the plugs for the axels and getting everythign smooth and neat will be all but impossible once the glass is wet and sticky with resin(the flatter and less interupted the better, ive learned from experience). you cna certainly mark the locations of the holes on the wood and glass over them and it will be mostly visible through a single layer of cloth. not to mention that fully hardened fiberglass and resin drills pretty easily.

From: Odyssey...@aol.com
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Sent: Monday, February 6, 2012 7:08:33 PM

Subject: Re: [TANKS] what doesn't fiberglass bond to?

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Odyssey...@aol.com

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Feb 7, 2012, 10:43:37 AM2/7/12
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i was even thinking of something like that as this isn't that heavy weight glass cloth i'l be using. i was thinking drill the holes, then resin coat the hull, letting the hull suck up what it can, sealing the wood for the most part and then give it 2 layers of the cloth, then take either a dremal grinding bit of sorts of a sharp hobby knife and remove the covered over holes and clean them up as need be. as i was thinking the same thing that having a plug to work around will cause some of the cloth to raise up around it.
 
Chris

Odyssey...@aol.com

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Feb 7, 2012, 10:45:13 AM2/7/12
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In a message dated 2/7/2012 12:28:45 A.M. Eastern Standard Time, smi...@myfairpoint.net writes:
 Fiberglass mold release should be available from the same place you bought your glass and resin. 
 
DSmith
ah, fiberglass mold release - sorry, i was thinking of the stuff i use for resins
 
Chris

Jason

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Feb 7, 2012, 11:05:54 AM2/7/12
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If you're gonna do that, do it all at once don't let the resin harden on the hull alone. When it cures there's a waxy film that is created and a second layer can delaminate because of it. You'll have to degrease with alcohol and rough scuff with 80grit sandpaper vs just laying it all at once and having the resin all molecularly linked
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Date: Tue, 7 Feb 2012 10:43:37 -0500 (EST)
Subject: Re: [TANKS] what doesn't fiberglass bond to?

i was even thinking of something like that as this isn't that heavy weight glass cloth i'l be using. i was thinking drill the holes, then resin coat the hull, letting the hull suck up what it can, sealing the wood for the most part and then give it 2 layers of the cloth, then take either a dremal grinding bit of sorts of a sharp hobby knife and remove the covered over holes and clean them up as need be. as i was thinking the same thing that having a plug to work around will cause some of the cloth to raise up around it.
 
Chris

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Odyssey...@aol.com

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Feb 7, 2012, 11:07:19 AM2/7/12
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In a message dated 2/7/2012 11:05:59 A.M. Eastern Standard Time, pil...@comcast.net writes:
If you're gonna do that, do it all at once don't let the resin harden on the hull alone. When it cures there's a waxy film that is created and a second layer can delaminate because of it. You'll have to degrease with alcohol and rough scuff with 80grit sandpaper vs just laying it all at once and having the resin all molecularly linked
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didn't know that either, but would have gone over it with the sand paper just for a better bite between layers
 
Chris
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