VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 08-18-2018, 08:12 PM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,293
Default Source for sheet plastic

I have seen a bunch of videos of people laying up glass between sheets of plastic, usually 3 or four mils thick. I checked my local big box stores and they didn't have anything, or I wasn't looking in the right place. Can anyone suggest a good source? I would like to try this method.
__________________
Scott Black
RV 4, with an engine...and other stuff
VAF dues 2018
Reply With Quote
  #2  
Old 08-18-2018, 08:24 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,612
Default

Local hardware store, paint store, etc.

Dave
Reply With Quote
  #3  
Old 08-18-2018, 08:41 PM
walter's Avatar
walter walter is offline
 
Join Date: Mar 2005
Location: Mansfield TX
Posts: 319
Default

I use extra large ziplock bags found at my local grocery store. Trim off the sides and top with a rotary cutter.
__________________
Walter Tondu
Current RV-8A Build Log - Fastback, XP-400, G3X Touch
Prior RV-7A Build Log
Reply With Quote
  #4  
Old 08-18-2018, 09:08 PM
rv7charlie rv7charlie is offline
 
Join Date: May 2006
Location: Pocahontas MS
Posts: 3,198
Default

Look for painter's plastic drop cloth.
Reply With Quote
  #5  
Old 08-18-2018, 10:10 PM
Charles in SC Charles in SC is offline
 
Join Date: Aug 2006
Posts: 604
Default

Are you wanting to create a sheet of fiberglass? I have made several during my build. I taped a sheet of wax paper to a sheet of aluminum, then laid up the fiberglass on the wax paper, then put saran wrap on top of this and smoothed it out as needed. This makes a smooth piece on only one side. Maybe you could press something flat on top while it sets up so as to flatten out the top surface. Hope this helps. Most big box stores sell plastic sheet for vapor barriers, drop cloths etc.
__________________
Aircraft structure built.
Going at a snail's pace, life gets in the way.
Wiring done.
Engine hung.
Working on cowling.
RV 7
Reply With Quote
  #6  
Old 08-18-2018, 10:27 PM
az_gila's Avatar
az_gila az_gila is online now
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 9,741
Smile

4 mill and 6 mill clear plastic sheeting are stock items at my local Home Depot

https://www.homedepot.com/p/HDX-3-ft...-50C/204711656

https://www.homedepot.com/p/HDX-10-f...-25C/204711657

The thicker stuff is much easier to work with.
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
Reply With Quote
  #7  
Old 08-19-2018, 05:44 AM
snopercod's Avatar
snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
Posts: 1,439
Default Use trash bags

What you want to use are the white non-scented kitchen trash bags. Black trash bags work OK, too, but you can't see through them as well. Lay down the first piece of plastic on a smooth workbench. Place however many layers of fiberglass you want (four is my limit), cut oversize, on the plastic in the proper orientation. Pour on the epoxy and spread it around with your 6" Thalco rubber squeegee. Wait a few minutes while the epoxy penetrates all layers (use a hair dryer to speed up that process). Squeegee off the excess epoxy being careful not to disrupt or pull the weave of the cloth. I use a tongue depressor to scrape the excess epoxy off the squeegee and back into the mixing cup.

When you've removed all the excess epoxy from the cloth, apply the second sheet of plastic on the top. Use a "pizza cutter" (available from ACS) to cut the sandwich to the desired size and shape. Remove the bottom layer of plastic and apply the fiberglass to the prepared workpiece. Use paper towels to remove any air bubbles and smooth out the cloth. Peel off the top piece of plastic and use a 1" chip brush (cut on an angle) to stipple out any remaining air bubbles. Apply peel ply in areas where you will be bonding something else to the top surface or where you want a feathered edge. (Keep in mind that using peel ply adds weight.) Clean up your tools and gloves with Acetone.

Safety note: Wear Butyl rubber gloves with cotton liners during this process.
__________________
(2018 dues paid)

Last edited by snopercod : 08-19-2018 at 05:47 AM.
Reply With Quote
  #8  
Old 08-19-2018, 06:50 AM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 7,982
Default

Vapor barrier. Standard construction material.

https://www.lowes.com/pd/BARRICADE-1...ing/1000007102

See posts 67 and 68, this thread:
http://www.vansairforce.com/communit...t=22931&page=7
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Reply With Quote
  #9  
Old 08-19-2018, 09:04 AM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,293
Default

Vapor barrier - that's it! Thank you. By the way, I tested my epoxy pumps. 20% low on hardener! I will just use them as convenient dispensers from now on. Thanks for that tip too.

Thanks to all who responded.
__________________
Scott Black
RV 4, with an engine...and other stuff
VAF dues 2018
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 10:27 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.