Backer Rod For Caulking Tub

Backer rods are flexible foam tubes of different densities.

Backer rod for caulking tub.

Before caulking use the md building products 1 2 in. The backer rod should be larger than the joint and be compressed into it. Use a cloth and water diluted detergent to scrub. They can be made of several different.

Apply it directly onto the sealant to loosen it. Many sizes diameters are available for optimal fitting to the size of the joint being sealed. Remove old sealant with caulk remover. Clean all surfaces to you want the caulking material to adhere.

The backer rod helps cushion and insulate and helps prevent 3 point bonding. The backer rod will fill up the excess space plus you can control how thick the sealant will be on top of the backer rod filling the joint. While caulk alone can be applied to narrow cracks gaps wider than 1 4 should be filled with foam backer rod first. Backer rods are usually round flexible lengths of foam that are used as a backing in joints or cracks to help control the amount of sealant caulking used and create a back stop.

How to use backer rod caulking material step 1. Fill very deep or very wide gaps up to 6 inches with a backer rod before applying the caulk. The sealant cannot be applied too thick or too thin for it to perform correctly.