I'm working on a project, using "something" plastic for a float on salt
water. Am contemplating using one of the low, rectangular plastic
storage containers if I can cement it closed to make it water-tight.
Don't know what kind of plastic they are typically made of -
polystyrene, polypropylene? Hubby and I like to engineer small,
inconsequential projects :o) Trying to rig a small, floating platform
to store kayak out of the water. Any helpful suggestions appreciated.
Since it's almost Christmas, you're welcome to make fun, as well :o)
I'd head to a place like Home Depot and choose some type of silicone sealer
that's designed for clinging to smooth surfaces like tile, tubs or glass.
Since you'll need a lot, focus on the tubes that fit into a caulking gun.
I'd use sandpaper to rough up all the plastic surfaces, and then wipe them
clean with rubbing alcohol. First, apply the sealer to the top edge of the
box where it touches the lid. Give it a day to dry (no matter WHAT the
instructions say about how it cures in 4 hours). Then, flip the box upside
down and load the sealer heavily into the seam under the lip of the lid.
Make sure that kayak's tied to something on land, just in case...... :-)
Yer talkin' to someone in the "Land of Four Hurricanes". Heck, yes, we tie
things down :o) All except for the 15'x5' skylight that few over onto the
top of a palm tree :o)
Plan on keeping it at front end of boat slip, tied to dock
and seawall.Does your advice to use silicone sealer come with a guarantee?
Does anyone know how to compute how many 12x24" (bottom dimensions) I
will need to float a 50# kayak and a couple of 1x6 pressure treated
boards? Plan to build very simple framework that will just lay onto the
plastic containers, with longitudinal boards protruding above the
lateral members so's the kayak will slide up onto it; probably bevel
long. members on one end to help it along.
No guarantees whatsoever! Having followed the thread, some of the other
suggestions sound better than mine, particularly those which involve blocks
of styrofoam, and construction adhesive.
HDPE and PP are the common plastics used for storage containers. These
materials are not easily or reliably glued. Most reliable joining is by plastic
hot air welding or similar techniques.
One old idea is filling up the space with ping pong balls or old tennis balls
for flotation. You might also find a source of industrial waste and look for
the blue plastic barrels that liquid materials are shipped in. These would not
need modification to float. Another way that works is to prepare a polystyrene
foam block of the shape you want and fiberglass it with an epoxy resin.
Polyester resins will dissolve the foam but epoxies don't. These materials are
usually found in boat shops. Another cheap source of containers might be
plastic gas tanks from a auto salvage yard. Sealing them up could be possible
using a heat source like a soldering iron.
Hope this helps...
I was just helping a friend install a printer that was a replacement unit.
The packing technique might work for you.
Instead of foam inserts, the packing material was simply good size plastic
bags full of those foamed peanuts. The bags were packed just loosely enough
to allow them to be fitted to the printer and having the peanuts bagged kept
them from the usual mess.
See what kind of very strong bags you can find. As they say "whatever floats
"Charlie Bress" <Here-I-am-at-the-last-moment.com> wrote in
Most importantly,this also keeps the protected item from sinking to the
bottom of the container and not having any protection,while the loose
peanuts float on top.I've seen many expensive electronic units damaged by
improper packing using loose styro peanuts.
email@example.com (Greg) wrote in
I was just commenting on how people will take an expensive item to be
shipped,and toss it into a box and fill the box with loose styro peanuts
and consider it good enough for shipping.Then they are amazed to hear that
it had been damaged beyond repair because it was packed poorly.
This time of year when people are shipping Xmas presents,the "pillow-of-
peanuts" technique of packing items is good to know.
Up here in Canada Futureshop is now using little bags (like sandwich bags)
filled with air instead of peanuts.
My telescope came packed in a solid block of brown expanded foam.
We have a local high end chromer who uses a white expanded foam to ship his
They do a lot of custom motorcycle chrome work.
Those bags could be punctured and deflate.Or have a slow leak and
deflate.That means no protection.Even bubble wrap has MANY cells,so loss of
a few does not matter.
Puncture all the peanut-pillows and it doesn't matter;No effect.
We had custom expanding foam packing(InstaPak) at my TEK field offices,and
there always was the possibility of foam sticking to the item,permanently
ruining it,or too much foam crushing the item upon expansion,or it
squirting out any opening in the box,or splitting the box.It's messy stuff
to work with.
We received lots of packages with loose peanuts,so making peanut-pillows
was a great way of recycling them,and cheaper than using the expanding
foam,or cutting pieces of regular foam to fit.
Soemtimes the foam found it's way through a tear or missed opening in the
plastic and it sticks REALLY good to things,nearly impossible to remove
without damage to the item.
We occasionally received bad batches of foam components(2-part foam),and
the foam would not expand immediately as it should,and we had a hard time
with it,putting too much foam into the boxes and then it would begin
expanding uncontrollably.It made terrible messes.
If you have a recycle bin close by you can get plastic 1 gallon milk jugs free.
Bleach bottles or any gallon jug will work but I understand that the plastic in
milk jugs will last for decades.
Or check your local auto repair shop and pickup jugs from oil and antifreeze.
These can pollute so milk jugs are better.
2 jugs filled with foam support almost 100 pounds.
build a frame under your deck to hold the bottles fill the frame and then cover
with galvanized fencing.
This will hold the bottles in place.
Once the dock is in the water the bottles tight against the bottom.
This will be cheap as hell and last for years.
I should add my buddy filled his jugs cheap at a re-chroming shop.
They shipped their finished product in boxes filled with expanded white foam.
It is really cheap in bulk.
Enclosed in the milk jugs it will last forever.
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