Fixing large gaps with a 2 1 2 backer rod
Most people don't think much about a 2 1 2 backer rod until they're staring at a massive expansion joint in a driveway or a commercial floor that looks more like a canyon than a gap. When you've got a space that wide, you can't just pour sealant into it and hope for the best. It'll sink, crack, and waste a ton of expensive material. That's where this specific size comes in. A 2.5-inch diameter backer rod is the heavy lifter of the caulking world, designed to fill the void so your sealant can actually do its job. ...