Abstract: There is disclosed a road crack repair system for mounting on a vehicle. The system includes a sealant applicator that is positionable in front of the vehicle, the sealant applicator having a sealant outlet for discharging a molten sealant product above a crack in a road surface, and a trowel that is adjacent the sealant outlet and is arranged to contact the road surface and spread sealant product into and over the crack; a vessel within which to store a molten sealant product, and a conduit for delivering sealant product from the vessel to the sealant outlet; a support that is arranged to support the applicator in front of the vehicle with the trowel in contact with the road surface; and a control system that is operable by an operator to displace the applicator along road surface to follow a crack with advancement of the vehicle in a forward direction.