Use a cloth and water diluted detergent to scrub.
Backer rod for caulking tub.
Backer rods are flexible foam tubes of different densities.
The sealant cannot be applied too thick or too thin for it to perform correctly.
Many sizes diameters are available for optimal fitting to the size of the joint being sealed.
Clean all surfaces to you want the caulking material to adhere.
Fill very deep or very wide gaps up to 6 inches with a backer rod before applying the caulk.
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How to use backer rod caulking material step 1.
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.
Apply it directly onto the sealant to loosen it.
Remove old sealant with caulk remover.
Use a putty knife to.
Caulk backer rod to help fill gaps and openings in pavement cracks wall joints foundations sidewalks and driveways.
The backer rod should be larger than the joint and be compressed into it.
They can be made of several different.
The backer rod helps cushion and insulate and helps prevent 3 point bonding.