VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet


Go Back   VAF Forums > Main > RV General Discussion/News
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 06-21-2022, 08:24 PM
1001001's Avatar
1001001 1001001 is offline
 
Join Date: Dec 2014
Location: Just Minutes from KBVI!
Posts: 1,422
Default

Quote:
Originally Posted by AlexPeterson View Post
I don't believe it would stick much to HDPE. Getting adhesives to stick to HDPE is very difficult.
hmmm, this seems like an opportunity for some tests.

I have some pieces of scrap HDPE around. When I get around to building my extended range tanks and break out the sealant, maybe I'll do some test coupons on HDPE bonding to various materials with the flamemaster sealant.
Reply With Quote
  #12  
Old 06-21-2022, 08:39 PM
bruceh's Avatar
bruceh bruceh is offline
 
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,682
Default

We had an old motorhome that had a cracked water tank that was HDPE. The official solution was to "weld" the plastic with some sort of heat gun device that laid down new plastic. There was no way to get the gun in to where the crack was. The guy who knew how to weld this type of plastic told me to just get some pure silicon aquarium sealant at the local big box store, slap a big wide layer on the crack then and use something to cover the silicon and crack. It worked great and we were then able to fill up the fresh water tank without getting the water contaminated with anything noxious. Once the silicon cured it was safe for fish, so it must be pretty inert.
__________________
Bruce Hill
RV-9A N5771H flown over 1000 hours!
http://www.overthehills.com/RV-9A-Project
APRS Tracking for KJ6YRP and Flying Over the Hills Blog
2022 VAF donator
EAA Tech Counselor, Pre Buys, Build assistance - canopy/tanks/fiberglass/electrical/repairs
Reply With Quote
  #13  
Old 06-26-2022, 02:54 PM
gmcjetpilot's Avatar
gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 4,770
Default

UPDATE... I did weld repair (soldering iron). The tank injected molded seem has a flange of extra material next to the crack. I melted that into the crack. Tested with water, seemed sealed. Put epoxy over as belt and suspenders. I let it sit two days. Put it together and it worked for awhile. Ran the generator for 30 minutes, then let it sit pm cardboard for two days, and got a dinner sized gas stain

The tank is back ordered. Manufacture shows back ordered with no expected date. I will buy a tank ($80) if I can get one. If not I will grind the epoxy out and re-melt it more aggressively. I was a little timid at my first attempt. I will take the tank back out and give the weld repair another try just for fun, but a new tank is the way to go (if when I can get one).
__________________
George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767

Last edited by gmcjetpilot : 06-26-2022 at 02:57 PM.
Reply With Quote
  #14  
Old 06-26-2022, 07:22 PM
DMFenster DMFenster is offline
 
Join Date: Jan 2012
Location: Woodbridge, VA
Posts: 141
Default

It's been my experience that proseal sticks to EVERYTHING!
Reply With Quote
  #15  
Old 06-26-2022, 07:39 PM
gmcjetpilot's Avatar
gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 4,770
Default

Quote:
Originally Posted by DMFenster View Post
It's been my experience that proseal sticks to EVERYTHING!
It is worth a shot if I can't buy an $80 tank. With that said it is a huge PAIN to take off all the cowling to get at tank. I really don't want to do it more than once more.
__________________
George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 02:56 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.