Polyurethane candle molds are professional level candle molds
used to make near seamless to completely seamless candles.  
These molds effectively absorb heat from melted wax and
produce high quality molds, sometimes with deep undercuts
that just aren't available in plastic molds.

For this project, we used our
3 well polyurethane tiny taper
mold, wick, a wick threader, wax melting pitcher, red dye chips,
candle making thermometer and our small stainless steel
funnel.  Also used are "T BARS" that are included with
polyurethane molds, as needed.
Many polyurethane candle making molds include "T bars."    T Bars
are NOT wick threading needles.  They are inserted into the molds
wick placement holes as a place holder and to keep the hole open.  
Because polyurethane molds are "self sealing," a wick hole without
a T bar present may slowly close up and, in time, will be difficult to
Melt your wax using the double boiler method.  As your wax melts,
prepare your mold for the pouring process.

Thread your wick through the eye of your wick threader needle.  We
used small flat braid taper wick for this project.   Feed about 6 inches
through the eye of the needle, leaving several feet of wick on the
other side.
Once the wick is threaded into the needle, remove the T bar and slowly pass
the threaded needle through the wick hole left behind.  Feed the wicking
needle through from the bottom of the mold to the top.  The extra 6 inches of
wick you threaded through the eye of the needle helps to ensure that the wick
doesn't pop out of the needle as you thread it into the mold.
Once you pass the wicking needle through the bottom of the mold, pull it
the rest of the way through and out of the mold's top.
Remove the wicking needle, leaving at least six inches of wick
coming out both the top and bottom of the mold.  As always in
candle making, it is better to have to much wick than too little!   You
can trim away the excess later.
Secure and center your wick.   You can use any method you are comfortable
with for this step.  We used our T bar and tired the wick into a small knot to
secure it, then pull it tight from the bottom of the mold.  This helps to make
sure you don't lose your T bar too!
Prior to pouring your candle, this is how your mold should look.  
Polyurethane molds are self sealing - the rubber will press around the wick
and prevent leakage.  No mold sealer is required!  We are only pouring one
well, but you could wick and pour all three at the same time if you wanted to.
A small stainless steel funnel may help in the pouring process.
Fill your well / wells with molten wax.  As much as in possible, avoid overfilling
the wells.  Keeping the wax inside the well will give you a nicer, more
professional appearing final candle as no trimming will be required.
After your wax sets (the time will vary on the type and style of mold), your
finished candle will slide right out of the mold.  You can gently pull it by the
wick and the candle should pop right out.  If needed, you can flex the mold
slightly around the candle to ease in the candle's release.
Your finished candle will be seamless and fantastic!