So you’ve got a crack. Not a big crack. But big enough. Here’s how you make that crack disappear into the night.
First things first, you’re going to want to clean out any loose debris in that crack. Use a wire brush to brush the debris away from the crack so it doesn’t blow back into it. Make sure the surface and crack are dry.
Next we need to use a sealant. Few things you need to know first. Do you have a static or dynamic crack? Does your crack move or not with the change in temperature? If it doesn’t move then we want to use a polyurea sealant. This is self leveling and durable. It has good wear resistance. It protects joint edges from spalling. If it is dynamic crack you need a polyurethane sealant. This has greater elongation properties that allow it to expand with temp changes. It has a rubber like consistency and can handle 70 percent joint movement.
Tools you’ll need for this repair are a caulk gun, sealant, 4 inch scraper, and a backer rod or silica sand.
So you don’t want more than about a half an inch of sealant in the crack. This is where your backer rod or silica sand come into play. Fill just enough to leave about half an inch for the sealant.
Next overfill the crack with the sealant and allow it to cure for about an hour or so. Note polyureas will change color when sitting in the sun for a while.
After about an hour shave off the excess with you scraper. The goal is to make it flush with the surface of your paint job.
This painting tip is brought to you by a painter in Pittsburgh, PA. Well that wraps this one up peeps. Till next time…