On a concrete overlay job, the contractor did a poor job of installing a joint sealant and the sealant failed soon after it was applied. We were hired to do the repair but cold weather has set in. We're thinking of temporarily sealing the joint with a backer rod and hot-pour asphalt, then coming back in the spring to do the job right. Does this sound like a workable plan?
If cold weather has already caused the joint to open, you might be able to keep out dirt and other debris with only a backer rod. Then you won't have to clean out asphalt before applying the new joint sealant. Use a closed-cell polyethylene foam backer rod. It won't absorb water and is less compressible than a polyurethane foam.