UZIN KR 518 Premium Accessory - 2-Component Joint Filler

Low odor resin for fast filling of dormant floor joints   

UZIN KR 518 is an ultra-low-viscosity fast-setting resin to fill joints in cracked, spalled concrete and saw cuts prior to the installation of UZIN moisture vapor retarder products, self-leveling compounds or patches.  It offers deep penetration properties into concrete, providing high compressive strength. A wide service temperature allows for use in difficult climatic situations.


  • Interior & exterior use
  • Filling dormant floor joints in concrete substrates prior to the application of UZIN preparation products*
  • Residential and commercial applications
  • Use with radiant floor heating systems

*UZIN KR 518 is not a moisture vapor barrier


  • Easy to mix • Allows for fast use
  • High coverage • Cost saving
  • Ultra-low viscosity • Fills narrow cracks
  • Fast-setting • Open to service after 15 minutes
  • Low temperature use • Cures below freezing

Technical data

*At 70 °F (21 °C) and 65 % relative humidity
Compressive strength

6,800 psi (ASTM D 695)

Tensile Strength

6,500 psi (ASTM D 412)


Dual-cartridge 20.2 oz. (2 x 300 ml)


min. 12 months

Mixing ratio



gray (mixed)


approx. 24 lin. ft. @ 1/8" width x 1" depth (varies with porosity of fill area)


< 5 g/L

Ideal application temperature

60-77 °F (16–25 °C) at floor level

Pot life

1 min*

Working time

1 min* at 70 °F (21 °C)
5 min at 40 °F (4 °C)
10 min at 0 °F (–18 °C)
(cool temperatures will increase pot life)

Ready for foot traffic

3 min* at 70 °F (21 °C)
10 min at 40 °F (4 °C)
20 min at 0 °F (–18 °C)
(cool temperatures will delay set time)

Ready for covering

15 min*

Minimum application temperature

0 °F (– 18 °C)

Ordering information

Packsize Shipping unit
88680 Dual-cartridge 20.2 oz. (2 x 300 ml)
Box :
Pallet :

Quality seals and badges

SCS_IAQ_IAG[Building Materials]_1CG

Products and accessories

UZIN Dispensing Gun - KR 518 Premium Accessory

The UZIN Dispensing Gun has been specifically designed for the proper application of UZIN KR 518 Low -Viscosity Joint Filler; ensuring the correct mixing and application rates.

UZIN Mixing Tips - KR 518 Premium Accessory

Use with the UZIN Dispensing Gun and KR 518 Joint Fill

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