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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• For the sealing and maintenance of joints in concrete roads and asphalt surfacing
• Rapid return to service
• Resists dirt and ingress of grit associated with trafficked pavements
• Good adhesion to concrete and asphalt surfaces
• Complies with BS 2499 :1993 Type N1

Application Notes

• Can normally be applied to a maximum joint size of 30 mm width and 25 mm depth. Minimum joint width and depth dimensions should not be less than 13 x 15 mm respectively except for longitudinal joints
• To ensure the sealant operates within the stated movement capacity of 25%,the width of the sealing slot should be designed in accordance with the recommendations of BS 6093
• Prime concrete surfaces with Fosroc Primer B2 and allow the solvent to evaporate before sealing. Metal surfaces do not require priming but should be warmed with a gas torch immediately before sealing to promote adhesion
• It is essential that the correct equipment is used for melting Nitoseal MB333 to ensure that the subsequent performance is not impaired by damage through over-heating or pouring at the wrong temperature. The heating apparatus must be fitted with a thermometer, an oil jacket and a means of stirring the molten compound
• Remove Nitoseal MB333 from outer cardboard packing. No cardboard should be put into the heater. Cut the product and inner plastic bag into small pieces, melt a few pieces in the melting vessel, and gradually add more to the molten material, stirring occasionally. Heat until the product reaches its correct pouring temperature of 165°C to 175°C
• Extra care must be taken in cold weather. The cold surfaces of the joints may cause rapid chilling of the compound. To help compensate for this, the product should be poured at the top limit of the pouring temperature range. Frost may give concrete a deceptively dry appearance
• Nitoseal MB333 should be poured to a level 5 to 7 mm below the traffic surface, or to the level specified
• Equipment should be emptied immediately after use and cleaned with Fosroc Equipment Cleaner. Product which has been heated and allowed to cool completely must be discarded
• Coverage dependent on joint size. See product data sheet

Limitations

• Not suitable for use in contact with tar or pitch based materials
• Should not be used in contact with potable water
• Not suitable for use with closed cell polyethylene joint backing