Too much heat

Too much heat or to long on one side will do this.

Shrink wrapped with logo

With the ends pen you can add your logo and all the info required and on both sides if you like. Some exposure on the ends occurred after shrinking was finished.

Shrink wraped

This soap shrink wrapped when I got it.  It doesn't stack well with the ends all messed up but if you leave the ends open it works very well. 

Tubing does't work to well with some molds. does;t form fit like I figure it should .

Sealer

This sealer makes bags

ULINE tube shrink tubing

This is the tubing I bought.