Sashco 30110 Pre-Caulking Filler Rope Backer Rod， 5/8-Inch x 20-Feet， Gray</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Easy to fit - soft and pliable so it fits into the joint easily</li><li>Water resistant - unlike open cell backer rod， it repels water to help protect the joint from damage</li><li>Fills the joint so you use less caulk</li><li>Fully compatible with all substrates and sealants</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51by8jk-WNL.jpg' noproxy></br>