Adhesives

How is hot-applied concrete joint sealer used?

Hot-applied elastomeric concrete joint sealer fills joints and cracks in concrete for construction and road maintenance. It is made from synthetic rubber, filler and chemicals, stays highly elastic, keeps moisture out of the joint, and holds its bond even on pavement that has been flooded for a long time. The product referenced meets TIS 479-2541. It is a black, semi-solid material that does not dissolve in water, with a density of 1.02 kg/litre, packed in 15 kg boxes.

Application steps

• Clean the joint of dust and debris, then apply primer to improve adhesion.
• Heat in a double-walled oil-jacketed melter. Keep the oil at or below 240 °C and the sealer at or below 180 °C, and avoid direct heating.
• Stir the softening material until it is uniform.
• Pour into the joint while the material is at 140–180 °C.
• Let it cool.