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#51306 - 01/30/07 8:07 pm fiberglass tank repair  
Joined: Aug 2001
Posts: 63
Steve in Ohio Offline
BritBike Forum member
Steve in Ohio  Offline
BritBike Forum member

Joined: Aug 2001
Posts: 63
Central Ohio
I have a Spitfire tank that came with my Lightning project. I have used it with no leaks, but sealed it this past summer with Caswell's stuff. I want to get it repainted soon, but there is a round ding in the top that looks crazed (sp). Little fusures not deep, but they need to be filled before painting. I am not familiar with fiberglass repair so what should I use to fill in these cracks??
Thanks in advance
Steve in Ohio



'68 A65 Bitsa
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#51307 - 01/30/07 9:07 pm Re: fiberglass tank repair  
Joined: May 2006
Posts: 150
Damon Fever Offline
Life member
Damon Fever  Offline
Life member

Joined: May 2006
Posts: 150
Raleigh NC
I haven't used it on motorcycle tanks, but I used to use a product called Marine Tex to repair cracks on fiberglass sailboats. It is an epoxy gelcoat paste that hardens to be very strong and tough. It is easily sandable however. You can get it in small quantities at shops that sell yacht equipment and supplies. JB Weld might be as good, but if it was mine I'd try Marine Tex. This is the stuff: http://tinyurl.com/56upn

For best results, first use a suitable burr on a Dremel tool to open out the cracks and get to good solid material. If the cracks are very minor, just make a V centered on the crack. Usually you have to go through the gelcoat - just. Blow out dust with dry compressed air; cleanliness is important. Fill, sand, repeat. When fully cured, prime, sand and paint.

Cheers
Rick F

#51308 - 01/30/07 9:27 pm Re: fiberglass tank repair  
Joined: Jun 2004
Posts: 1,115
kboyd Offline
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kboyd  Offline
BritBike Forum member

Joined: Jun 2004
Posts: 1,115
Kansas
This stuff works real well.

http://www.caswellplating.com/aids/epoxygas.htm

Kyle


Kyle#44x

1969 T100R Daytona
1979 Powroll Honda XR250 "Dallas Baker" flattracker
1975 XL350 project bike
#51309 - 01/31/07 12:48 am Re: fiberglass tank repair  
Joined: Dec 2006
Posts: 3,752
btour Online content
BritBike Forum member
btour  Online Content
BritBike Forum member

Joined: Dec 2006
Posts: 3,752
Massachusetts, U.S.A.
Hi Steve,

I did a lot of research into coating for the inside of tank. It is unclear if you are doing outside or inside.

Be aware that any coating on the inside, if it fails has to be stripped out, and that is not as easy as it sounds. The stuff sold as Kreme has been failing for a lot of people. Seems that the alcohol in the gas is wrecking havoc. I don't know about the caswell. People seem to swear by it on this site.

Bruce posted this today. Apparently fiberglass is under attack by the new gas, and marine engines are getting ruined by the dissolving fiberglass.

# Fiberglass Fuel Tank Damage
Even low concentrations of ethanol have been shown to damage fiberglass fuel tanks. Ethanol dissolves the lining of fiberglass fuel tanks, often depositing a dark "sludge" inside marine engines causing costly damage. Eventually, fiberglass tanks dissolve until they fail, leaking fuel.


Polyester resin is to be watched out for.

http://www.hagerty.com/NewsManager/templates/template_ethanol.aspx?articleid=1124&zoneid=72


Bob, Lifetime bike: '71 T120R, bought in '71 at Ken Heanes, England.
#51310 - 01/31/07 2:18 am Re: fiberglass tank repair  
Joined: Aug 2006
Posts: 77
Nascarkent Offline
BritBike Forum
Nascarkent  Offline
BritBike Forum

Joined: Aug 2006
Posts: 77
Westland Michigan
Steve
If you have sealed the tank and it doesn't leak,
Then what you are left with is nothing more than cosmetic damage. All you need to use is some body filler.


1968 TR6R
1974 Commando
Nascarkent
#51311 - 01/31/07 3:13 am Re: fiberglass tank repair  
Joined: Dec 2004
Posts: 1,280
Skeet Offline
BritBike Forum member
Skeet  Offline
BritBike Forum member

Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
Steve,
Check out post I made on November 23, 2006 on stripping paint off fiberglass. the members gave me some real good info on filling cracks etc.
Skeet


Skeet Enjoy life....it has an expiration date..
1964 Hornet
1970 TR6R
1971 Norton
1972 XLH

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