[CPE]

I had a blowout on 5000 miles Towmax tires; replaced tires on that side with Carlisle. floor foam/insulation in floor above was damaged; groove cut in but not through board above tire. Need to fill and re-waterproof groove (about 1 1/4") inch deep and re-waterproof. What to install or fill the opening with.(appears to be a foam material --white)