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  #1  
Old 06-21-2022, 11:44 AM
gmcjetpilot's Avatar
gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 4,737
Default Does Proseal Chemseal B2 TANK SEALENT STICK TO PLASTIC

EDIT: High-density polyethylene (HDPE) *tank materal*
I did try "plastic welding" using a solder iron. It worked mostly worked, looked good, but it seeps. Pin hole? Was not aggressive enough. This is where sealant comes in. I am going to try again.


As any builder knows proseal or tank sealant sticks to everything.

Will is work on plastic fuel tank? The sealant is primarily for metal, however if the plastic is clean, roughed up, it should stick?

ANY EXPERT OPINION (or wild guessing) Appreciated.
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George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767

2021 Dues Paid

Last edited by gmcjetpilot : 06-22-2022 at 06:27 AM.
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  #2  
Old 06-21-2022, 12:04 PM
terrye terrye is offline
 
Join Date: Feb 2010
Location: Vancouver, BC, Canada
Posts: 1,008
Default Does Proseal Chemseal B2 TANK SEALENT STICK TO PLASTIC

I installed my NACA plastic cockpit vents with proseal. Inside of aluminum skin was already primed and painted. I roughed up the mating surface of the vents with sandpaper prior to mounting. Not flying yet, but they seem to be permanently installed.
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Terry Edwards
RV-9A (Fuselage)
2022/2023 VAF Contribution Sent
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  #3  
Old 06-21-2022, 12:36 PM
RVDan RVDan is offline
 
Join Date: Jun 2012
Location: Frederick, MD
Posts: 978
Default

Depending on the plastic, a primer may be required.
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Dan Morris
Frederick, MD
PA28-140 sold
Hph 304CZ sold
RV6 built and sold
N199EC RV6A flying
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  #4  
Old 06-21-2022, 01:26 PM
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9GT 9GT is offline
 
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Location: Southern Michigan
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Default

I used it many years ago to add vents to these new ventless “green friendly” plastic fuel cans that have those silly push down to open spouts that spill fuel everywhere but in the tank. I drilled out some brass and rubber tire valves, drilled mounting holes for them, then pro sealed them in. Replaced the spouts with old fashioned replacements you can still buy. Holding strong many years later and no longer have to fuss with non venting cans when I use them.
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Howell, MI
RV-10: #41686 Under Construction/Sold 2021
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2021

Last edited by 9GT : 06-21-2022 at 01:28 PM.
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  #5  
Old 06-21-2022, 02:09 PM
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BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,741
Default What specific material?

Some non-metallics would require flame passivation to allow a bond, then yes.

EDIT: Flame passivation is especially applicable to HDPE.
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RV-7

Last edited by BillL : 06-22-2022 at 05:23 AM.
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  #6  
Old 06-21-2022, 02:50 PM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 588
Default Proseal/plastic

YES Short answer
I have a 2001 RV-6A the other guy built.. He put the cowl pins in from the inside the cabin through the NACA vent. Bad idea
My NACA vents were both broken beyond repair, because of this failed trick. I used a heat gun to warm the Proseal and peeled them off with a putty knife. Glued new in place with more Proseal. 25 year old stuff to boot. no special prep either.
Never let go in 20 years. New ones are a year or so old. White airplane, so painted the vents black after installation.
Your luck may vary Art
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  #7  
Old 06-21-2022, 06:18 PM
Norman CYYJ Norman CYYJ is offline
 
Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,504
Default

I repaired a plastic hydraulic oil tank on my boat about 22 years ago and still no leaking. No idea the type of plastic though.
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  #8  
Old 06-21-2022, 06:43 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,498
Default Proseal

I have a can of Vans FlameMaster about 8 years old. I always mix a test before use. I fixed a leak on my Thermorest Mattress. Sealed the gaps on the Frankensnorkel. Many more odd jobs. It definately won't stick to a slick surface so abrade the plastic with 80 grit first.
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Larry Larson
Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #9  
Old 06-21-2022, 06:54 PM
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gmcjetpilot gmcjetpilot is offline
 
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Default

EDIT: High-density polyethylene (HDPE) *tank materal*''

Of course it has to be fuel proof.
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George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767

2021 Dues Paid

Last edited by gmcjetpilot : 06-21-2022 at 06:58 PM.
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  #10  
Old 06-21-2022, 07:22 PM
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AlexPeterson AlexPeterson is offline
 
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Location: Ottertail, MN
Posts: 2,538
Default

I don't believe it would stick much to HDPE. Getting adhesives to stick to HDPE is very difficult.
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Alex Peterson
RV6A N66AP 1750+ hours
KADC, Wadena, MN
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