Product Data Sheet Show all documents

Sikadur®-55 LP IN

Low viscosity, moisture tolerant epoxy injection resin and crack sealer

Sikadur®-55 LP IN is a two part, low viscosity, moisture insensitive injection liquid, based on high strength epoxy resin specifically formulated for dry or damp crack sealing. Suitable for use in hot and tropical climatic conditions. Confirms to ASTM C881, Type II and IV, Grade-1, Class F.

  • Solvent-free
  • Suitable for both, dry and damp conditions
  • Usable at high temperatures
  • Shrinkage free hardening
  • High mechanical strengths
  • High bond strength even in wet cracks
  • Hard but not brittle
  • Low viscosity
  • Injectable with single component pumps
.
Product Data Sheet Show all documents

Usage

  • To repair cracks by injection in structural concrete in slabs, columns, beams, walls, foundations, etc.
  • For surface treatment of cracks in interior and exterior slabs.
  • For roof slabs, parking lots and structures exposed to pedestrian and vehicular traffic.
 

Advantages

  • Solvent-free
  • Suitable for both, dry and damp conditions
  • Usable at high temperatures
  • Shrinkage free hardening
  • High mechanical strengths
  • High bond strength even in wet cracks
  • Hard but not brittle
  • Low viscosity
  • Injectable with single component pumps
.

Packaging

Small packaging:

Part A+B pre-batched1 kg
Part A0.8 kg container
Part B0.2 kg container

Bulk packaging:

Part A+B pre-batched62.5 kg
Part A50 kg container
Part B12.5 kg container

Colour

Part A+B mixedClear pale yellow
Part AColourless
Part BPale yellow

Product Details

Product Information

Product declaration

Confirms to ASTM C881, Type II and IV, Grade-1, Class F

Chemical base

Epoxy resin

Shelf life

12 months from date of production

Storage conditions

The product must be stored properly in unopened, undamaged and sealed original packaging, in dry conditions at temperatures between +5 °C and +40 °C.

Density

~1.08 kg/L (Part A+B mixed, +27 °C)

(EN ISO 2811-1)

Viscosity

~250 mPa·s (at +30 °C)
Technical Information

Compressive strength

~70 N/mm2 (7 days, +30 °C)

(ASTM D695)

Flexural strength

~50 N/mm2 (7 days, +30 °C)

(EN 196-1)

Tensile strength

~50 N/mm2 (7 days, +30 °C)

(ASTM D638)

Elongation at break

~1.9 %

(ASTM D638)

Tensile adhesion strength

Curing time

Bond strength

2 d, moist cure

≥ 7 N/mm2

14 d, moist cure

≥ 10 N/mm2

Shrinkage

Passes

(ASTM C883)

Heat deflection temperature

≥ 50 °C

(ASTM D648)

Water absorption

~0.6 % (24 h)

(ASTM D570)

Application

Application Information

Mixing ratio

Part A : Part B = 4 : 1 (by weight)

Ambient air temperature

+10 °C min. / +40 °C max.

Substrate temperature

+10 °C min. / +40 °C max.

Substrate moisture content

Sikadur®-55 LP IN is suitable for dry and moist condition. No standing water.

Pot life

> 60 min (100 g mass, +30 °C)
Application steps

APPLICATION INSTRUCTIONS

SUBSTRATE QUALITY

Substrates must be sound, clean, free from oil and grease, old coatings and surface treatments etc.

SUBSTRATE PREPARATION

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 by using compressed air.

MIXING

Pre-batched packaging:

  1. Add all of Part B to Part A.
  2. Mix with an electric mixer at slow speed (max. 250 rpm) for at least 3 minutes. Avoid entraining air.

  

Bulk packaging:
IMPORTANT

Part mixing is recommended.

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

APPLICATION

Impregnation of cracks in horizontal planes:
Saturate the crack by applying the product by paint brush or roller in several passes or by pouring between two "barriers" made with Sikaflex® sealant. The crack penetrating through structure must be sealed on the underside with Sikadur®-31 IN epoxy mortar or a suitable Sika® cementitious mortars.

  
Injection of cracks on horizontal / vertical planes:
Sikadur®-55 LP IN can be injected under pressure into cracks using a single-component injection pump. The injectors should be placed at a distance of 25 cm and the fissure between sections of injectors should be superficially sealed with Sikadur®-31 to avoid the loss of resin during the injection process. Vertical cracks must be injected from the bottom up. As soon as the resin oozes through the next injector, the first must be sealed and continue the injection process from the next. After completing the injection process, the injectors and sealing material can be removed.

  

IMPORTANT

Maximum width of cracks to be injected: 5 mm. Please contact Sika Technical Services for cracks > 5 mm.

CLEANING OF TOOLS

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

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