I have a corner of my bath tub that holds water because it is slightly unlevel. I thought about jacking it up on that side, but I am afraid it would crack the sheet rock, so I want to fill the low area with resin so that the water drains properly. A little less than 2 cups of water stands in the tub and on the outside ledge in one corner. Is there a resin you can recommend for this application that can hold up to bathroom cleaning solutions.