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Concrex Sub Zero

Make cold concrete repairs to damaged concrete at as low as -4°F with Concrex Sub Zero.



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Fast Facts

Usage Interior / Exterior interior and exterior
Suitable For Repairing damaged concrete in cold room floors or external areas

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Product Details remove

Concrex® Sub Zero is ideal for thin section and feather edge repairs which have to be undertaken in freezing conditions. The latest version incorporates polyaspartic technology and will cure as low as -20°C. It has excellent strength and chemical resistance and can be applied into cold areas where ordinary repair mortars would fail. It is ideal for repairs to any unheated area, internal or external and is suitable for application to concrete, metal and sand/cement.

  • Cures down to -20°C/-4°F
  • Virtually indestructible
  • May be feather edged
  • Chemical resistant and anti slip
  • Impermeable and non-dusting
  • Coverage: 1.2m² at 5mm per 10kg unit
  • Tack Coat Primer sub zero is essential for shallow applications and screeding

 

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Specifications add

Usage Interior / Exterior interior and exterior
Suitable For Repairing damaged concrete in cold room floors or external areas
Coverage 10 square feet per 22lb at 1/4" thick
Curing Time (hours) 3-5 hour at 59°F, 12-16 hours at 32°F, 48 hours at -4°F
Pot Time (hours) Half to one hour, depending upon temperature. If Concrex Sub Zero is used past its working life, trowelling will become difficult and adhesion reduced

How to Apply add

Surface Preparation
Surfaces should be clean, dry and free of all loose material. Wire brushing or sweeping is generally sufficient. If needed, wash with Bio-D or a suitable degreaser or detergent solution, to remove grease and oil, rinse and allow to dry.

Mixing
Concrex® should be stored at an ambient temperature above 50°F for approximately 8 hours prior to use. Do not use material if air and surface temperatures are below 50°F, apart from Concrex Cold Set which can be applied at 15°F. Each pack of Concrex contains aggregate pre-blended with resin and the curing agent. Do not mix inside the plastic bucket. Wearing protective gloves, tip the aggregate on to a mixing tray or board. Shake the containers of curing agent thoroughly until the liquid is a uniform color. Form the aggregate into a mound and leave a small hole in the middle. Empty the curing agent into the hole, ensuring the container is completely drained. Carefully mix the aggregate with the curing agent using a trowel until a smooth mortar is obtained, this will take several minutes. The more thorough the mixing, the ‘wetter’, smoother and more manageable the mix becomes. Alternatively, you can knead the mixture by hand, but you must wear suitable gloves. It is important to mix thoroughly until you achieve a consistent color.

Application
Place mixed material into the area to be repaired and spread out and finish with a steel trowel. To reduce ‘drag’ on the trowel, wet the blade with mineral spirits. This will aid getting a smooth finish to the Concrex. Concrex is normally applied in thicknesses of ¼-2 inches, but repairs can be feather-edged for a neat finish, as long as the majority of the repair is at least a ¼ inch thick. For repairs deeper than 2 inches, apply in separate layers (allow 6-8 hours between layers for curing) or use Concrex Deep Fill (which can be applied ½-4 inches thick in one layer). There is no need to reapply Tack Coat if building up in layers.

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