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Himflex 4K

Chemical resistant caulking compound, two-pack, modified epoxy composition

TS 5772-005-74321702-2012

Original state: ingredients A – viscous paste, ingredients B – viscous liquid
Suitable for food processing premises
Water resistance
High mechanical strength
High acid resistance

Technical characteristics

Ingredients A density
1,75 kg/l
Ingredients B density
1,05 kg/l
Mixture viability at 20°С
60 min
Surface is ready to use for pedestrian load at 20°С
in 1 day
Surface is ready to use for full mechanical and chemical load at 20°С
in 7 days
Ultimate compressive strength, not less than
>50 MPa
Ultimate tensile strength, not less than
>30 MPa
Fluidity resistance, not more than
2 mm
Acid resistance (H2SO4 20%)
>98 %
Alkali resistance (NaOH 20%)
>98 %
Water absorption 0,3%
Shelf life in fabrically closed packaging
12 months
Application in the food processing premises
Increased strength
Shore hardness D
82 s.u.
Mixing proportions (А : B), parties by weight
9 : 1
Application temperature, ºС
from 12° to 30°
Operating temperature, ºС
from -20° to 100°


Caulking compound Himflex 4K is designed for fitting the tiles and decorative framing of joints while making anticorrosive protection with single-piece articles (tile, brick, shaped graphite products and etc.) building structures and lining for technological equipment. It can also be used as filler for a wide range of surfaces.

Application in food industry premises is possible (without direct contact with food). In comparison to Himflex 2K and Himflex 3 caulking compound Himflex 4K has increased chemical resistance to mineral acids in higher concentration (including 98 % H2SO4 at t + 20C).




Substrate shall be thoroughly cleaned from dust, moving particles, scales, fat and oil stains. It must have mechanical strength and have sufficient bearing capacity. Residual moisture of the substrate to the depth of 20 mm can not exceed 10 %. For binding free water on the surface preliminary priming is required. For these purposes the following our products are suitable: bottom “Primer EP 01” (base – epoxy resin emulsion) that can be applied to wet and dry substrates or bottom “Primer EP 02” (modified epoxy composition), that can be applied to concrete substrates with residual moisture up to 10 %.


Welds shall be released from welding slag (flux) and layers of scale. Remove notches, burrs, welding spatters by grinding, round sharp edges, corners, notches, welding seams. Grease, marking paint or other substances shall be removed from the surface If needed, before performing blasting, to remove organic contaminants a solvent can be used (white spirit in accordance to GOST 3134). Degreasing shall be made to level 1 (GOST 9.402). Metal surface of protected constructions must be cleaned to the degree of purification Sa 2,5 (ISO 8501-1) or to level 2 (GOST 9.402).



Joints shall be dried and cleaned from dust and glue residue before caulking compound application. Joints must have rectangular cross section, width from 5 up to 8 mm and depth not less than 15 mm for tiles with thickness from 20 mm. Joints of smaller width (less than 5 mm) make their further decorative framing difficult.



Caulking compound preparation is done by thoroughly components mixing on the worksite. For doing this it is essential to open the bucket 0,5 kg with ingredients B (catalyst) and pour it into the bucket 4,5 kg with ingredients A (paste), then mix thoroughly for 2 minutes to form a homogeneous mixture. These ingredients shall be mixed for not less than 2 minutes with a mechanical mixer or low-speed electric drill with a special mixing head to form a homogeneous mixture without stripes and lumps. Special attention shall be paid to mixing the caulking compound near the walls and bottom of the bucket. Manual mixing of the components is not recommended. For fitting big amounts of tiles when mixing caulking compound components it is recommended to use tanks and buckets with wide necks and try to spread the material over the surface as fast as possible in order to abstract as much heat as possible and reduce epoxy resin self-heating effect that in its turn influences caulking compound viability greatly.

Mixing proportions

Ingredients A – 4,5 kg ( 9 m.p.)

Ingredients B – 0,5 kg ( 1 m.p.)



For tile fitting

Ready to use caulking compound is applied to the prepared laying area (primed if needed) with a serrated spatula. This area shall be faced with tiles for 30 minutes. Thickness of the layer beneath the tile can not exceed 2…3 mm and serration dimension of the spatula are chosen depending on the standard size of the tile. For acid resistant tile with big dimensions (with thickness from 20 mm) and in places undergoing severe intensive mechanical loads layer thickness shall be not less than 4 mm and tile joints filling depth can not be less than 1/3 of  tile thickness. Tile shall be laid on caulking compound layer and pressed, providing necessary contact with tiled surface. If caulking compound gets on the face of the tile it should be immediately removed with composition Himflex-Cleaner (more effective) or with a damp sponge. In case of cleaning delay (after 40 minutes) stripes and stains can removed with 10 % solution of spirit or solvents: acetone, toluene.

For decorative framing of joints

Caulking compound is applied with special spatula made from hard rubber or flexible metal spatula. For complex surfaces (with porous structure and roughness) it is recommended to cover tile surface along the joint contour with masking tape or any other identical material (e.g. paper tape) or to treat tile along the joint contour with wax before  caulking compound application. After Himflex 4K caulking compound application tile surface is immediately cleaned with a damp sponge. In case of cleaning delay (more than 40 minutes) tile surface can be cleaned with 10 % solution of spirit or solvents (acetone, toluene). If caulking compound has already hardened (after 5-6 hours) tile surface cleaning can be extremely difficult and could only be done by mechanical means.

For surface spackling

Ready to use caulking compound is applied to the prepared surface with a spatula or stainless steel gauging trowel. After the complete drying of the caulking compound surface is ready for finishing agents application.

Operation time and technological properties of the caulking compound depend directly on ambient air temperature. It is important to take into consideration that the temperature of facing materials and surfaces could be extremely different from the temperature in the premise. Recommended caulking compound application temperature is in the range from +12º С up to + 25º С. Optimal working temperature for epoxy compositions is in the range of 20º ± 2º С. In this conditions caulking compound has optimal viscosity and its viability is approximately 40 minutes. At this temperature surface can be used for pedestrian load in just 24 hours. In case of lower temperatures the possibility of surface use can be delayed up to 3 days.

Tile dimension




 Tile thickness, mm








 Consumption, kg/m2








Recommended tile joint width while tile fitting is from 5 up to 8 mm. Joints of smaller width make their further decorative framing difficult.

Fitting consumption: with thickness of the layer beneath the tile of 2..3 mm is approximately 4,5..5 kg/m² tile (excluding decorative framing).

Spackling consumption: with thickness of spackling layer of 1 mm is 1,5 kg/m² surface



Tools can be cleaned with acetone according to safety regulations on this category of substances.



  • Not recommended for construction joints filling;
  • Clean tile surface before the composition hardened (see Application unit);
  • Do not expose caulking compound Himflex 4K to solvents earlier than in 1-2 weeks after application (depending on air temperature in the premises where works are carried out).



  • Wear protective gloves and glasses while working with composition;
  • If skin contact occurs, the area should be immediately and thoroughly washed with water;
  • If exposed to eyes, eyes should be immediately and thoroughly flushed with water and seek medical attention immediately;
  • Premises where works are carried out must be equipped with good ventilation.



  • Caulking compound components (Ingredients А и Б) shall be stored in sealed containers in covered storage rooms;
  • Modified epoxy resin included in the composition is not affected by crystallization that allows storage and transportation even at below-zero temperatures;
  • In case of caulking compound transportation and storage at the temperature lower than 0º С, unpacking of containers shall be made not earlier than in 24 hours after their conditioning at the temperature of 25º ± 5º С.