RP 5078 A

Hot Applied Sealants

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RP 5078 A HOT APPLIED SEALANT is formulated with selected asphaltic resins, synthetic polymeric rubber, plasticizers, stabilizers, and a blend of organic, reinforcing fillers. This economical material is a hot applied, single component sealant that provides excellent results under extremely varying conditions.  RP 5078 A is the perfect joint and crack sealant for many applications.


  • Superior bonding characteristics
  • Great weather resistance
  • Excellent results throughout freeze and thaw cycles

RP 5078 A meets all requirements of Texas DOT Asphalt Rubber Class A

Recommended Pour Temperature370 - 390 °F
Maximum Safe Heating Temperature400 °F
Flexibility (ASTM D3111 Modified)Pass at 30 °F
Penetration at 25 °C30 - 50
Viscosity, 400 °F100 poise max.
Resilience40 % min.
Asphalt CompatibilityPass

Use an agitated, oil-jacketed unit that has separate temperature gauges for both the sealant and the heat transfer fluid.  Take the plastic bag of sealant and load into the kettle one at a time.  Melt only enough material for the day’s activities.  Once melted, additional material can be added as needed.  Material can be safely reheated within the sealants service life. NOTE:  Prolonged heating of the sealant above the maximum safe heating temperature may cause it to gel in the kettle.

To facilitate proper adhesion, the joint or crack should be dry and clear of any dirt, dust, or other contaminates.  Substrate and ambient temperatures must be 40 °F or above.  Proper sizing of the joint will cause the maximum extension/compression to not exceed 50% of the width.  Joints or random cracks of ¼” or less are difficult to properly clean prior to applying the sealant.

The service life when heated to application temperature is approximately 12 hours. Adding fresh material to the melter as sealant is being used will extend the service life. Product shall be agitated during installation. Any material that has exceeded the service life should be removed from the melter and discarded.

Coverage Width Coverage Depth Coverage Pounds/100 Lineal Feet