Vinyl bag for vacuum press

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Forum topic by sh2005 posted 05-16-2010 05:38 PM 2156 views 0 times favorited 6 replies Add to Favorites Watch
View sh2005's profile


97 posts in 3265 days

05-16-2010 05:38 PM

For those who do veneering with vacuum press and build your own bags, where do you buy the vinyl from? I have seen the and couple of other online merchants and what they offer, but are there local stores or other online stores where you can find vinyl sheet that are suitable for veneering? I went to two arts and crafts stores and I didn’t see any clear vinyl in their fabric department.

I am getting ready to try out my first veneering with vacuum press. I have built up my pump and the flow control mechanism for quite a lower cost than what is offered at the online stores, so I wanted to find out if there’s a cheaper source for vinyl as well or not. I wouldn’t mind paying a hefty amount for a good quality bag, but only after I have tried out veneering couple of times and realize that I like the results and it is something I will do a lot more.

6 replies so far

View Bill Davis's profile

Bill Davis

226 posts in 3953 days

#1 posted 05-17-2010 01:50 AM

Check out Joe Woodworkers site if you haven’t already. Here is some of his info on bags that might help
I actually bought my bag from Joe so haven’t gone through the process. But one or more of his discussions might help steer you in the right direction.

View sh2005's profile


97 posts in 3265 days

#2 posted 05-17-2010 02:06 AM

Hi Bill,
Thanks for the info. The website you mentioned and veneersupplies are from the same person, with the veneersupplies being the commercial site. I have looked in there and there are vinyl sheets I can buy, but I am trying to see if there is an alternative.

View John Ormsby's profile

John Ormsby

1288 posts in 3766 days

#3 posted 05-17-2010 04:51 AM

One of the problems with making your own veneer bag is having long term sealed seams. The glue that is used MUST be applied in a well ventilated area and everyone wearing proper respirators. It is very toxic. A high quality bag is made of Urethane is very flexible and long lasting. Vinyl bags work well but are stiffer which makes manipulating difficult veneer jobs tougher. Commercially made bags are also electrical welded sealed. You would be amazed at how easy a bag can spring a leak. It is vital to have a leak free bag. Veneering is easy with a little practice.

-- Oldworld, Fair Oaks, Ca

View a1Jim's profile


117128 posts in 3606 days

#4 posted 05-17-2010 04:53 AM

I got mine from joe the woodwrker also

-- wood crafting & woodworking classes

View Gofor's profile


470 posts in 3816 days

#5 posted 05-18-2010 02:00 AM

When I worked with composites in the aircraft industry, we used butyl rubber tape and made all our own bags from rolls of vinyl sheet (and also some high temp materials for the heated applications).

The rubber is cheap :

To make the bag, fold the sheet material and cut to size of the project. Unfold and run a strip of vinyl along the open seams. put a short piece of vinyl over your vacuum hose nozzle so that it seals around it. refold sheet over project and press down on the seams.

You can make the bags out of almost any non-porous plastic sheeting, as long as you put some cloth over any sharp edges/corners that would cut through it. IF you get a pinhole while pulling the vacuum, just stick a little piece of the rubber over it to seal it.

For flat projects, just stick the butyl rubber to a mylar, formica, etc (smooth) table or workbench top, and just cover with the plastic sheet. The table surface becomes the “bottom” of the bag, and is rigid and stays flat.

We could pull up to 23” vacuum using this process. (we used mostly venturi-type extractors running off compressed air lines rather than vacuum pumps.)


-- Go

View Ger21's profile


1075 posts in 3160 days

#6 posted 05-18-2010 03:26 AM

I got my vinyl from a marine canvas supplier I found online, but that was almost 10 years ago.

I found a place that has .020 vinyl really cheap, but .030 is more durable.

-- Gerry,

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