What is a decent bag material that can be obtained locally(home depot,ace,etc.) for a decent price that can be used for sandwich construction,and also sealant tape.Will standard 3/8 wide mastic work?
3-4mil
6 is a little too thick
someone once used silicone seal for the sides and mastic for the ends (tube)
you can make your own end clamps with some PVC tubes from home depot
Jesus,
2-4 mil poly from the hardware or home store. Try either masking or duct tape. The sealant tape or something very similar is also used in the assembly of metal buildings and roofs. Not sure what mastic is.
dd
Hey Bernie
When you say “to thick” what does that mean mechanically?
What I mean is, what would be the negative impact on the procedure by having a thicker bag?
Thanks,I asked about the tape because Im putting up a steel building right now and there will be about 30 rolls of the tape left over,was hoping I could use it for this.Thanks for the replies all of you,very helpfull.
There are some heavy plastics that would probably have very large wrinkles when vacced to the contours of a board making it more difficult to work with,and if the plastic were too thin I imagine it would just stretch and not have good clamping power.
A real vac bag cost $12 and is trouble free.
Not worth the drama of leaky bags and tape, I had to
throw away both top and bottom skins on my first attempt.
Just my 2c,
Where at?
Hey lavarat
Where do you get your bags from?
Have you ever noticed that epoxy and resin won’t stick to home depot type plastic sheeting?
Have you also noticed the oily residue on your hands when touching that plastic?
I wonder what effect that contamination would have when doing the sand coat over the bagged
lamination.
That would keep me from using it.
Ditto what lavarat says, using plastic sheeting with the edges sealed with tape SUCKS! And I was sooooo careful sealing everything up! Worse than worthless, because it ate up so much of my time.
Go to fiberglasssupply.com and get their 36" nylon bagging tube. 4 yards will do about any size board you’ll ever want to make, and should last a couple dozen pulls with careful use. Just about anything can be used for breather cloth… Towels, packing blankets from Uhaul, paper towels… I’ve used the same breather cloth for every board I’ve ever bagged. You can use the mastic tape in the ends if you want, but it’s much better to get a set of the “quick lock seals” from ACP composites. I’ve had a single set I’ve used for every board I’ve ever done. Worth their weight in gold. Same goes for the EZ bag connector.
The relative additional investment to get the products that really make your life easier is tiny when considered over the life of your hobby. It’s not like the cost difference between a festool and a harbor freight tool… More like the difference between a black and decker and the black&decker with slightly better options… Spend just a few more bucks, you’ll be REALLY glad you did.
By buying the tubing a couple of feet longer than needed, I was able to use the vacuum sealant tape at both ends. When it came time to remove the project, I just cut off one end and used fresh sealant tape for the next pull. The tape is about an inch wide so I can do a number of pulls before the bag gets too short. For SUPs, go with the wider tubing. It makes getting everything in and out of the bag easier.
do you run a “constant on” system or have you been able to achieve a “vac and release” system.
I have been trying to achieve the latter with only limited success.
How do you store your bags?