Caulking Saw Cuts and Cracks

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What happens here

After the floor has been acid etched and dried completely, the next step is to caulk any saw cuts or minor cracks in the concrete. The creator uses a urethane caulk from Tower Tech and applies it with a caulking gun. He emphasizes the importance of properly cutting the caulk tube tip at a 45-degree angle and ensuring the hole is large enough to fill the gap. Once applied, he smooths the caulk with a wet finger and wipes away any excess with a wet rag, preventing sloppy ridges that would show through the epoxy. He highlights the benefits of caulking: preventing dirt and debris accumulation, stopping bugs and spiders from nesting in cracks, and providing a smoother, easier-to-clean surface. He typically marks the stopping point for caulking at the garage door line to avoid extending caulk onto the driveway. He also caulks the edges where the concrete meets any raised footings or stem walls.

Goal: Seal cracks and joints for a smooth and clean epoxy finish

Tools and materials

Caulking Gun — Applying caulk to cracks and joints
Wet Rag — Smoothing caulk and cleaning excess
Tower Tech Urethane Caulk Tower Tech — Filling concrete cracks and saw cuts

What they say

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then start the epoxy this process of caulking this floor and i like using a product from sherwin's called sure max we're going to be caulking the saw cuts and the cracks and those saw cuts are deep cuts and and they actually collect a lot of dirt and debris a lot of ants and stuff like that will come up from them if you caulk them it'll keep uh dirt and debris from falling into it it'll keep the bugs out of it and it'll actually make your floor look a lot nicer so here we go we're gonna start caulking it just using a regular caulking gun and this suremax caulking that has worked really well for us in the epoxy that we use so now we're starting this process of caulking the cracks and when we apply our epoxy to our garage floor the epoxy doesn't want to be anywhere outside of the garage and so you don't want your caulking to extend from the saw cut outside the garage either so i'm going to mark exactly where i want my caulking to end and i can see where the garage the garage door comes down and our epoxy is going to end on the inside edge of the garage door so my caulking is going to end right about there i'm going to mark that just so we don't accidentally extend the caulking beyond that mark we're just going to begin you know caulking our cracks and making a nice clean smooth caulking fill down inside the crack so we're working right along just filling these cracks of the axle the saw cuts in this concrete i'm just just going along squeezing my caulking gun caulking trigger just filling it up and then just going over it with my finger wiping it smooth and you don't want to have anything any excess all over the concrete because you have any excess on the sides and ridges and sloppiness it's not gonna show through in your epoxy so you want to wipe it smooth and clean and actually keep a wet rag with me and it actually helps blame it and smoothing it out [Music] one of the tricks you're actually getting a nice fill in your saw cut or traps cracks is actually cutting the tip of your caulking tube just right and you want to cut it i like to cut it at a 45 degree angle and you want to cut it big enough so it's actually pumping out enough coffee to actually fill that whole gap because if you don't fill it up then it's going to create bubbles and it's not going to expand and contract with the concrete properly it'll actually separate and break if there's any expansion contraction in the concrete so get a 45 degree cut and a large enough hole in your caulking tube…

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