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Weber.tec EP Injection Resin

Nitokit LV & Nitokit TH

Pre-packaged low viscosity or thixotropic epoxy crack injection system.

SikaDur® 52 Injection Type N


SikaDur® 52 Injection Type N

Low viscosity injection resin.

Product Description:

Sikadur®-52 Injection Type N is a two part, solvent-free, low viscosity injection liquid, based on high strength epoxy resin. Type N (= Normal Potlife) is used for substrate temperatures between +5°C and +30°C (UK).


As an injection resin with good adhesion to concrete, mortar, stone, steel and wood.
Sikadur®-52 Injection Type N is used to fill and seal voids and cracks in structures such as bridges and other civil engineering buildings, industrial and residential buildings, e.g. columns, beams, foundations, walls, floors and water retaining structures. It not only forms an effective barrier against water infiltration and corrosion promoting media, but it also structurally bonds the concrete sections together.

Characteristics /Advantages:

  • Solvent-free
  • Suitable for both, dry and damp conditions
  • Usable at low temperatures
  • Shrinkage free hardening
  • High mechanical and adhesive strengths
  • Hard but not brittle
  • Low viscosity
  • Injectable with single component pumps

Product Data:


Part A: Transparent
Part B: Brownish Part A+B mixed: Yellowish-brownish

Pre batched: Part A+B: 10 x 1 kg units


Storage Conditions/ Shelf-Life:
24 months from date of production if stored properly in unopened, undamaged and sealed original packaging, in dry conditions at temperatures between +5°C and +30°C.

Technical Data:

Chemical Base:
Modified solvent-free two-part epoxy resin.

Part A: 1.1 kg/l (at +20°C) Part B: 1.0 kg/l (at +20°C) Part A+B mixed (2 : 1): 1.1 kg/l (at +20°C)

Thermal Expansion:

89 x 10-6 per °C (from -20°C to +40°C) (According to EN ISO 1770)

Mechanical / Physical Properties:

  • Compressive Strength: 52 N/mm2 (after 7 days at +23°C) (According to ASTM D695-96)
  • Flexural Strength: 61 N/mm2 (after 7 days at +23°C) (According to DIN 53452)
  • Tensile Strength 37 N/mm2 (after 7 days at +23°C) (According to ISO 527)
  • Bond Strength To concrete: (According to DafStb-Richtlinie, part 3) > 4 N/mm2 (failure in concrete) (after 7 days at +23°C)
  • E-Modulus Flexural Strength: 1800 N/mm2 (after 7 days at +23°C) (According to DIN 53 452)

System Information:

Application Details:

Consumption / Yield:
1 kg of Sikadur®-52 Injection Type N is ~ equal to 1 l injection resin.

Substrate Preparation:
Requirements: Sound, clean, free from oil and grease, old coatings and surface treatments etc. Pre-treatment for good bond: Concrete, mortar, stone should be thoroughly prepared by high pressure water jetting or mechanical means such as grinding, chiselling etc. Cracks must be cleaned to remove dust with compressed air.

Application Conditions / Limitations:

Substrate Temperature +5°C min. / +30°C max.

Substrate Humidity Dry or damp (SSD - Saturated Surface Dry: no standing water)

Application Instructions:

ratio A: B = 2: 1 parts by weight and by volume

Mixing Time:
Pre-batched packaging:
Add all of part B to part A. Mix with an electric mixer at slow speed (max. 250 rpm) for at least 3 minutes. Avoid entraining air.

Bulk packaging:
Add both parts in the correct proportion into a suitable clean, dry container and mix in the same way as for the pre-batched units.

Application Method / Tools:

Cracks in horizontal slabs:
Saturate a few times using a brush or gravity fill them by pouring mixed Sikadur®-52 Injection Type N between two “dams” e.g. made from Sikaflex® sealant. Cracks penetrating slabs to their soffit should first be sealed on the
underside, e.g. with Sikadur®-31 epoxy mortar or a suitable cementitious Sika mortar.

Cracks in vertical structures:
Mixed Sikadur®-52 Injection Type N can be injected under pressure into the cracks using a single component injection pump, such as the Aliva AL-1200, AL-1250 or the Sika® Hand Pump. Injection ports (packers) are set at approx. 25 cm intervals beside the crack and the crack between the injection ports (packers) sealed e.g. with Sikadur®-31 to prevent injection resin to escape during the injection process.

Vertical cracks should always be injected from the bottom upwards. As soon as injection resin oozes out of the next packer / injection port, the first one is sealed and the injection process continued from the next one. After completion of the injection process, the injection ports (packers) as well as the sealing material between the ports are removed.

Cleaning of Tools:

Clean all tools and application equipment with Sika® Colma-Cleaner/Thinner C immediately after use. Hardened / cured material can only be mechanically removed.


Temperature Normal Type (1 kg mixture)

  • +5°C ~ 120 minutes
  • +10°C ~ 80 minutes
  • +23°C ~ 25 minutes
  • +30°C ~ 10 minutes
  • +40°C -

Notes on Application / Limitations:

Maximum width of cracks to be injected: 5 mm.
Sikadur®-52 Injection Type N is suitable for dry and damp, but not for wet injection conditions.

Value Base:

All technical data stated in this Product Data Sheet are based on laboratory tests.
Actual measured data may vary due to circumstances beyond our control.

Local Restrictions:

Please note that as a result of specific local regulations the performance of this product may vary from country to country. Please consult the local Product Data Sheet for the exact description of the application fields.

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 Material Safety Data Sheet containing physical, ecological, toxicological and other safety-related data.

Sikadur 52 Injection Type N / Resin injection
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