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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Supplied as a ready to use dry powder
• The addition of a controlled amount of clean water produces a free-flowing grout
• No risk of significant “wash-out” of cement phase when placed under water
• Displaces water effectively
• Gaseous expansion system compensates for shrinkage and settlement in the plastic state
• High early and ultimate strength
• Exceptional resistance to freeze thaw - ensures durability
• Chloride free
• Pre-packaged needing only on-site addition of water
• Blended from Portland cements, graded fillers and chemical additives
• The aggregate grading minimises segregation and bleeding whilst assisting flow characteristics
• Yield: Approximate yield per 25kg bag when mixed with 5.5 litres of water is 14.5 litres
• Fire Classification: EN 13501-1 Class A1 Non-combustible
• Conbextra UW is non-flammable
• Please refer to the Product Data Sheet for full details of:
  • Properties
  • Specification Clause
  • Standards Compliance
  • Mixing
  • Application Instructions
  • Curing
  • Cleaning
  • Storage
  • Health and Safety

Application Notes

• Non-immersed substrates must be thoroughly soaked prior to grouting for a minimum of 2 hours
• The formwork should be constructed to be leakproof as Conbextra UW is a free flowing grout
• This can be achieved by using foam rubber strip or Nitoseal MS60 beneath the constructed formwork and between joints
• If the grout is likely to be subjected to moving water before the final set, it should be top shuttered
• Mix continuously using a MR3 mixing paddle until it reaches a smooth, even consistency
• Place the grout within 20 minutes of mixing to gain the full benefit of the expansion process
• Continuous grout flow is essential
• Curing will not be required in totally submerged situations
• However, when cast above water, exposed areas should be thoroughly cured with Foscroc Concure WB curing membrane, continuous application of water and/or wet hessian
• Minimum thickness: 10mm above water
• Maximum thickness: 75mm above water, 150mm below water

Please see the Product Data Sheet for detailed information.

Limitations

Low Temperature Working:

• For ambient temperatures below 10°C the grout consistency should be flowable and the formwork should be maintained in place for at least 36 hours
• Normal precautions for winter working with cementitious materials should then be adopted
• The grout should be protected from freezing conditions up to 48 hours after placing

High Temperature Working:

• At ambient temperatures above 35°C the mixed grout should be stored in the shade
• Cool water (below 20°C) should be used for mixing the grout

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.