Rectorseal 66112 Denver Foam Backer Rod , 1" x 75'Rectorseal 66112 Denver Foam Backer Rod is a non gassing backer rod use as a backing for elastomeric other applied caulking sealants. It controls the depth of applied sealants ensures cross sectional hourglass configuration. Features Easy to use Economical Allows air to reach both sides of sealant offering a faster more uniform cure Will resist oil, gasoline most solvents, odorless will not stain Additional Information Case Weight (lbs) 2. 01 Case