In eb.com,
Chris typed:
I have finished sanding the floor and want to use a water
based poly. Is there anything special about water based
that I need to know? I have always used oil based in the
past.
I just read that with water based poly you should use a
base coat. After you apply the base coast do you sand
before putting on the first coat of poly?
Thanks
Chris

Can you read?

1. Pick up can
2. Prepare to read something
3 Read the labels on the can; all labels.

Now you have answered your own question. If not, there will be a phone
number on the label to call.
1. Pick up phone
2. Dial that number
3. Ask your question of whoever answers.
4. Follow their instructions.

Assumption: Greater than third grade reading comprehension level.