Choose the Correct Type of Backer Rod

lighter gray there's basically two types of background there's there's open cell and closed cell right this one's actually hybrid we'll talk about that in a minute but open cell is going to absorb water right right it's also squishier right so you can kind of force it into the joint to make it the diameter that you want right kind of to conform to the Joint exactly okay exactly I'm not a big fan of open cell because if the joint ever fails and you get water behind there now you got a sponge behind your wall right so you're uh you're keeping water in so so we don't open we don't offer any open cell background so none of your so this is it opens up so we'll get to that it's it's a hybrid that so this is a closed sellback ready for how stiff that is right so if you have you know a joint that's the same size right the whole way this is perfect for that this one we call filler up this is actually a hybrid where it's actually open cell in the middle but it's lined with a closed cell on the outside so you see how squishy that is yes so you know think about like a sidewalk or a driveway right it's not it's not we've built a joint that's one certain width it's cracking all over the place right this can be really nice because it can be nice and big in some of those bigger areas but you can squish it down in some of the smaller so it's a little easier to work with but still gives you that waterproof so open cell and the inside and then got a seal on the outside of it that's right so some interesting