LL Flooring
3/8 in. Diameter x 50 ft. Length Backer Rod, $6.99 USD/Box, LL Flooring (Lumber Liquidators)
$6.99
3/8" x 50' closed-cell PE foam designed to fill gaps and expansion spaces. Ideal for spacing between walls and floors. Compatible with silicone to seal the perimeters of floating floors. Made in the USA.
Details
size: 2 in.x5 in.