Hard Rock Concrete Supplies carries a full range of supplies for the concrete industry. Our range of products includes; Sealers, Cure & Seals, Rebar (Steel and GFRC), Insulation, Support Brackets, Weeping Tile, Patching and Repair Materials; as well as hand and power tools.
Our team prides itself on our customer service, product knowledge, and wide range of quality products and would love the opportunity to talk with you about all of your concrete needs. 

SikaFix PU Polyurethane Injection Liquid 12 (459433)

SKU: 000600
Regular price $44.99
Description SikaFix® PU is a low-toxicity, two-component, 100% solid, polyurethane foam. It will displace and stop flowing water, forming a tough flexible foam, firmly bonded to the concrete surface.
Where to Use
  • Can be used to stop water under a hydrostatic head and provide a resilient tough and flexible, closed cell polyurethane grout.
  • Cracks in tanks, tunnels, pipes, basements, pools, subways or any structure where water intrusion must be stopped.
  • The final cured product is a non-toxic rubber foam similar to that used in shoe soles.
  • High bond strength even to damp surfaces.
  • Flexible and easy to use.
  • Waterproofs and seals cracks quickly and efficiently.
  • Ministry of Transport Québec acceptance.
  • Low Pressure Procedure (for low water flow): SikaFix® PU is supplied in a single or side-by-side cartridges and is easily dispensed with a manual gun through a 6 mm (1/4 in) mixing tube. Sika® Injection T’s are used for this procedure.
  • High Pressure Procedure (for high water flow): SikaFix® PU is supplied in a simple 1:1 ratio unit, it can be dispensed through a pneumatic or manual dispenser.
Technical Data
 Packaging 250 mL (8.45 US fl. oz) single piston cartridges, 12 per case

600 mL (20.2 US fl. oz) side-by-side 1:1 cartridges, 12 per case
1 L (33.8 US fl. oz) grout = approx. 25 L (6.6 US gal.) foam (typical free expansion)

1 L (33.8 US fl. oz) grout = approx. 3 L (0.79 US gal.) foam (typical contained expansion)

Variation in crack/void configuration, injection conditions and end use will influence the yield.
Shelf Life
1 year in unopened packaging. Store in a heated area, on pallets. Do not allow product to freeze. Once opened and depending on humidity level, shelf life may be reduced to as little as 3 months.
Mix Ratio
A:B = 1:1 by volume
Properties at 23 °C (73 °F) and 50 % R.H.
 Component Part A
Part B
Mixed A+B
Specific Gravity
1.02 kg/L
1.24 kg/L
1.13 kg/L
250 cps
200 cps 
500 cps
Dark amber
Pot Life (200 g) 
60 min*

*With increased humidity the presence of moisture reduces the pot life. When displacing water the foam development is rapid.

Reaction & Gel Times (s=seconds)
 SikaFix® PU Reaction Time
Gel Time

39 s
460 s
Product properties are typically averages, obtained under laboratory conditions. Reasonable variations can be expected on-site due to local factors, including environment, preparation, application, curing and test methods.

Surface Preparation

Low Pressure Injection: Use Sika® Injection T’s or use Sika® Injection Ports and fit the fat end into 13 mm (1/2 in) holes.

High Pressure Injection: Use Sika® HD Packers in 9.5 mm (3/8 in) holes. Drill holes at a 45° angle to intersect the crack approx. 100 mm (4 in) below the concrete surface. These holes should be drilled alternately on opposite sides of the crack allowing a 200 mm (8 in) distance between them. This should ensure crack intersection. After fitting injection ports or packers, drilled holes should be flushed out using water delivered through a 6 mm (1/4 in) hose from a pressure pot (low pressure) or a high-pressure pump or grease gun (high pressure). Be careful to check that each hole intersects a crack and a path is
available for subsequent injection. Where no travel is evident, additional holes should be drilled to provide the necessary access to the crack. All cracks must either contain moisture or be pre-wetted in order to trigger a reaction and activate the expansion mechanism.

Before starting the injection, Spray water through each of the injection nozzles. SikaFix PU will only expand on contact with water.

Application: Attach the static mixer to the cartridge and dispense SikaFix® PU using either a pneumatic or manual dispenser. Injection of SikaFix® PU is carried out, starting at the lowest injection point. As SikaFix® PU moves into the crack, water is displaced
ahead of it. Once all the water is released, SikaFix® PU will follow the water - when this is observed, injection should move on to the next packer and the same process continued along the crack until it is completed. Excess SikaFix® PU appearing on the crack surface can be easily removed when product has stopped foaming, using a sharp knife.

Clean Up
Use SikaFix® Pump Flush, a non-flammable solvent, to clean tools, lines and equipment of uncured product. Cured material can only be removed mechanically.

  • For reaction of the material to take place and the expansion mechanism to be activated, all cracks must either contain moisture or be pre-wetted.
  • For potable water contact applications, use SikaFix® HH+ which is ANSI/NSF Standard 61 approved.
Health and Safety Information
For information and advice on the safe handling, storage and disposal of chemical products, users should refer to the most recent SAFETY DATA SHEET containing physical, ecological, toxicological and other safety-related data.