It can only be purchased online, but comes in many solid colors and prints.It is sold either in 20x20 squares (around $3.75 per sheet) or by the yard (usually around $8.50 per yard). By the yard is cheaper because you can squeeze your patterns togehter to get more out of the fabric. I can get 12 medium sized diapers out of 2 yards of 60" fabric. Look in the "Links" page for diaper fabric stores.
PUL comes in 1m and 2m. 1m is thinner than 2m, but I've never had a problem with the 1m leaking, even while out of the house running errands (which is when disaster always strikes, right?). When buying prints, they usuallly come in 2m, which is quite a bit stiffer than 1m, but really not bad and it does soften up a little with regular washes.
You can also use PUL for bibs, waterproof travel diapers bags, etc...
Tips for sewing PUL (copied off of http://www.sewzannesfabrics.com/pul-polyurethanelaminate.html )
- Sew with the shiny(laminated) side facing away from the pressure foot.
- You can use a glue stick (regular office supply type) to baste the PUL and the fabric. No messing with pins and much easier.
- Use a ball point needle
- I use a Teflon foot.
- If you need more than one layer use hair clips instead of pins to fix them together prior to sewing.
- When making bibs, combine the PUL and the outer fabric together using a KK2000 or 505 spray. Then it basically becomes one sheet.
- The shiny side is the water proof side, not the other one.