H4 is a hot poured joint sealant designed for the treatment of reinstatements and asphalt overlays.

Where to use?

  • Transverse or longitudinal vertical joints
  • Patch repairs
  • Trench reinstatements
  • Drain or manhole frames
  • Kerb channels


Ensure that the joints to be sealed are clean and free from dust, fuel and oil spillage. The face of the joints should be dry with a surface temperature ideally of at least 10°C. Do not apply to icy surfaces or in rain.


H4 must be heated before use. For best results, use a heating kettle with an indirect heating system such as hot oil. Ensure that H4 doesn’t exceed 200°C and that the oil does not exceed 230°C.

When hot, pour either from a watering can or direct from the melting kettle via a pressure fed heated hose with a special nozzle. The 25kg tin pails are not suitable for placing on or over direct heat (i.e. gas or wood fire).


For a 40mm vertical joint face and a 2mm coated thickness of H4 0.08kg seals approximately one linear metre of joint or a 25kg pack seals approximately 300 linear metres of joint. A 12.5kg pack seals approximately 150 linear metres of joint.


H4 is supplied in 25kg siliconized easy strip cartons (20x 25kg per pallet) or 12.5kg siliconized easy strip cartons (40 x 12.5kg per pallet) and in 25kg metal pails with handles (24 x 25kg per pallet) being leak proof, these pails are particularly convenient for use during hot weather.


Keep free from frost and extremes of heat. Do not stack. Do not store in direct sunlight.


H4 is a CE Marked paving grade bitumen complying to BS EN12591:2009 which also complies with BS 594987 clause 6.8 Joints.

H4 is suitable for jointing as required in Clause 903.22(i) of Volume 1 of the Specification for Highway Works.



  • Wear suitable protective clothing (heat resistant gauntlet gloves, overalls, protective footwear, face visor)
  • DO NOT allow water to contact hot material
  • DO NOT exceed maximum safe heating temperature


If molten material contacts skin:

  • DO NOT attempt to remove
  • Immerse affected area in cold running water for at least 10 minutes
  • Seek medical advice without delay
  • This product is hazardous for transportation when carried at temperatures above 100°C 


For full safety information, please request the H4 Safety Data Sheet 12 using the contact information on this webpage.