Failure of the longitudinal joint is a decades old problem that municipalities worldwide must battle with every year. Millions of dollars and countless hours have been dedicated to understanding this costly issue as numerous individuals have searched for a solution.

Seam Sealing Systems Inc. has developed a revolutionary design utilizing electric infrared technology to heat and seal the longitudinal joint. Through the use of our unique temperature control system we have precise accuracy, unsurpassed safety and ultimate protection for the surface of your asphalt pavement.  

Studies show that early deterioration of the longitudinal joint can be directly related to low joint densities. With the use of the Seam Sealing System we are  capable of increasing joint densities, creating a solid, watertight joint with increased bonding strength. With a stronger longitudinal joint your roadway will withstand the test of time and reduce the overall lifecycle cost of your asphalt pavement through prevented surface maintenance.

Test Results

Numerous core samples from several different projects show that the  use of the Seam Sealing Machine provides an average of 2.1% increase in longitudinal joint compaction over the control section. Results also show a much tighter joint that is completely smooth and often undetectable. 

Dexter Airport 

Longitudinal Joint  No Heater Used

2 years after construction

Longitudinal Joint With Electric Infrared Heater

2 years after construction

Heated Joint During Construction


Airport Projects

Airport projects are a major focus for longitudinal joints as the typical width of a runway requires numerous pavement passes, with each pass creating a potential for pavement failure. A common practice with Airport construction is to pave a short distance then set back before that pass cools, this is done to attempt to pave against a hot joint. Not only does this practice require more time and labor for the contractor but it also creates several transverse joints on the runway. With each transverse joint there is a major weak zone created due to segregation and uneven pavement lanes. The photos below clearly show this weak segregated zone. 

 Poor joint construction.
Transverse joint and segregation due to setback attempt to pave against hot joint.
No joint heater used.
Segregation at transverse joint.
No joint heater used.

 With the use of the  Seam Sealing Machine there is no need for these setbacks as the matching pavement is heated to full temperature regardless of time between passes. Airport runways can be paved with full length passes creating a much stronger more uniform pavement with increased production for the contractor . There is no need to create these transverse joints and the weaknesses associated with them. The photo below shows the transverse joints  compared to the passes farther over that were paved at full length with the use of the Seam Sealing Machine. 

Transverse joint with no joint heater compared to full length pass with joint heater.

The Seam Sealing Machine is capable of many heating operations, each with absolute control and selection of the surface temperature to prevent any damage to the heated materials.

  • Heating longitudinal joints
  • Drying pavement and milled surfaces  
  • Heating concrete to reduce cure times
  • Repairing existing pavement blemishes
  • Repairs of existing pot-holes or large cracks in asphalt surfaces
  • Cold weather repairs during winter and spring frost heave seasons