DURA-FILL® TX300B - Crack and Joint Sealant for Moderate Climates

Dura-Fill TX300B is a hot-pour crack and joint sealant for portland cement and asphaltic pavements. As an economical and effective preventative maintenance treatment, Dura-Fill prolongs pavement life by sealing cracks and surface joints from water penetration. Dura-Fill TX300B is a single component, specially-formulated mixture of paving grade asphalt, vulcanized crumb rubber, plasticizers, and stabilizers. When melted and properly applied, it forms a resilient and adhesive compound for both cement and asphaltic pavements. 

Recommended Uses: Dura-Fill TX300B is recommended for sealing cracks and joints in portland cement, asphaltic pavements, and parking lots. It is designed to seal expansion and contraction joints, longitudinal and transverse cracks, joints between concrete and asphaltic shoulders, and random cracks. 

Surface Preparation: Proper surface preparation facilitates adequate adhesion and consequently the max-imum life of the sealant. In order for proper adhesion, the crack/joint must be free of moisture, dust, loose aggregate, and other contaminates. The substrate and air temperatures must be 40 °F or above. Sawing, routing, and/or sandblasting are the preferred methods of preparation. Use oil-free compressed air and heat to clean and dry the crack/joint immediately prior to sealing. Cracks/joints should be sized so that the maxi-mum extension and compression do not exceed 50% of the width. Best results are obtained when the cracks/joints are opened at least 1/2 inch wide. 

Melting and Application: The melting kettle should be a conventional, oil-jacketed kettle equipped with an agitator and temperature-control device for both the material and heat-transfer oil. Carefully insert small quantities of Dura-Fill TX300B and the plastic bag into the melting equipment while the agitator is turned off. Load material slowly to avoid splash back. After the initial load has reached the recommended pouring tem-perature, fresh material may be added to the melter as sealant is used. Melt only the material that will be used during that day. Purge material remaining in the kettle lines at the end of each sealing operation. The material may be safely reheated and can be applied using a pressure feed wand system or a pour pot. 

Note: The temperature of the heat transfer oil should not exceed 525 °F. Do not heat Dura-Fill TX300B above the maximum heating temperature and do not maintain it at that temperature for prolonged periods of time. This could cause the material to gel in the equipment or fail in the joints. A significant viscosity in-crease accompanied by stringiness signals the approach of gelation. If this occurs, immediately remove the material from the melter and dispose of it. 

For further details read and follow the Dura-Fill safety data sheet (SDS), “Installation Instructions for Oil Jacketed Dura-Fill Products,” and “P&T Products’ Warranty.”