Kiilto Kerafiber

Microfibre-reinforced, one-component waterproofing membrane for interior wet room areas prior to tiling. Sprayable.
CE marking, ETA approval, VTT Waterproofing system certificate 141/00.

Special features

  • microfibre-reinforced
  • one-component
  • coverage 0.6 l/m² walls, 0.8 l/m² floors
  • drying time 2+6 h

Materials

Product Information
Application

Kiilto Kerafiber is a ready-mixed, fibre-reinforced waterproofing membrane for use in floors and walls in bathrooms, saunas and similar wet areas prior to tiling. Not suitable for applications that are constantly under water (e.g., pools) or exposed to temperatures above +70 °C (e.g., sauna steam room walls).

The substrate must be dry, absorbent, free from dust and even. All materials that might impair adhesion of the waterproofing membrane must be removed. Weak and flexible constructions must be braced before starting the job. Ensure that the construction and substrate are suitable for waterproofing and tiling. Underfloor heating is laid under the waterproofing membrane. Kiilto Kerafiber's compatibility with the most commonly used floor drains is tested and approved. Ensure floor drain's compatibility by consulting our technical service or the floor drain supplier.

Package Size EAN Code
1 l / 1,3 kg 6411511640014
5 l / 6,5 kg 6411511640052
10 l / 13 kg 6411511640106
15 l / 19,5 kg 6411511640151
Technical Information
Application temperature

+15–25 °C

Bond strength

≥ 0.5 MPa

Coverage

Floors min. 0.8 l/m² = 1 kg/m² (at least 2 applications)
Walls min. 0.6 l/m² = 0.8 kg/m² (at least 2 applications)

Crack bridging ability

Category 1: 0.4 mm (coverage 0.8 kg/m²)
Category 2: 0.75 mm (coverage 1.0 kg/m²)
Category 3: 1.5 mm (coverage 2.6 kg/m2 or 1.4 kg/m² with Kiilto Nurkkavahvikenauha)

Curing rate

Approx. 2 h (1st coat), approx. 6 h (2nd coat)

Density/specific weight

1.30 kg/l

Frost resistance

Freezing

Layer thickness

Walls: min. 0.4 mm (dry film)
Floors: min. 0.5 mm (dry film)

Package sizes

1 l, 5 l, 10 l, 15 l

Storage

Storing in a cool place, not below +1°C, in a tightly closed original container, max. 1 year.

Substrate

Concrete, masonry, cement-based levelling compound and building boards designed for wet areas.

Substrate humidity

Floors and walls plastered or levelled with Kiilto products can be waterproofed after the required drying time stated in the technical information of that specific levelling compound or plaster.

Concrete substrate < 90 % RH

Temperature resistance when dry

Max 70 °C

Type/binder

Synthetic SBR-rubber

Viscosity

Approx. 40,000 MPa

Water vapour permeability

Coverage: walls 33*10ˉ¹² kg/(m²*s*Pa), SD=6 m
Coverage: floors 30*10ˉ¹² kg/(m²*s*Pa), SD=6,5 m

Instructions and Safety
Instructions for use

Walls:
If needed, sand and/or smooth uneven substrates with Kiilto wall plaster suitable for use under waterproofing and tiling. Prime dry wall surface prior to waterproofing with Kiilto Keraprimer as per instructions. Let the primer dry for at least one hour before starting the waterproofing work.

Stir Kerafiber before use. Apply Kiilto Kerafiber on walls in vertical corners, construction board and other substrate material joints and junctures. Press Kiilto Nurkkavahvikenauha tape to fresh waterproofing membrane and ensure that it is thoroughly wetted. With pipe inlets, cut an approx. 10 x 10 cm reinforcement piece and cut a hole in the middle, approx. 4 mm smaller than the pipe's outside diameter. Clean, roughen with sandpaper and prime the inlets. Press the inlet reinforcement piece to the fresh waterproofing membrane and ensure that it is thoroughly wetted. You can also use pre-fabricated inlet reinforcements. It is also possible to seal up wall inlets using Kiilto XPU adhesive sealant prior to applying Kiilto Kerafiber. Apply Kerafiber on the entire area to be waterproofed with a roller and allow to dry (colour change). Apply a second coat of Kerafiber and let dry. Let the first coat dry for approx. two hours. Let the second coat dry for approx. six hours. Drying time depends on layer thickness and prevailing conditions. Check that the membrane layer is consistent. Seal any thin/porous spots and allow to dry thoroughly. The dry membrane layer must be 0.4 mm at the minimum. Fix wall tiles with Kiilto Saneerauslaasti, Superfix DF, Kerapid Pikasaneerauslaasti, Lightfix or HighFlex S2 DF. After the tiling adhesive has dried, grout the tiles with Kiilto Saumalaasti and use Kiilto Saniteettisilikoni for sealing vertical wall corners and inlets.

Floors:
If needed, sand and/or smooth uneven substrates with Kiilto floor levelling compound. Prime dry floor surface prior to waterproofing with Kiilto Keraprimer as per instructions. Let the primer dry for at least one hour before starting the waterproofing work.

Stir Kerafiber before use. Apply Kiilto Kerafiber in horizontal corners and pipe inlets and press Kiilto Nurkkavahvikenauha tape onto the fresh waterproofing membrane and ensure that it is thoroughly wetted. For inside and outside corners you can also use pre-fabricated corner pieces. Clean, roughen with sandpaper and prime the inlets. Inlets on the floor can be sealed also with Kiilto XPU fix before application of Kiilto Kerafiber. For floor drains you can use self-adherent Kiilto Kaivolaippa or Kiilto Lattiakaivovahvike reinforcements.

Apply Kerafiber on the entire area to be waterproofed and let the first coat dry (colour change). Apply a second coat of Kerafiber on the entire area to be waterproofed and let dry (colour change). Let the first coat dry for approx. 2 h. Let the second coat dry for approx. 6 h. Drying time depends on layer thickness and prevailing conditions. Check that the membrane layer is consistent. Seal any thin/porous spots with waterproofing membrane and allow to dry properly. The thickness of the waterproofing membrane layer on the floor drain area must be 1.2 mm at the minimum, elsewhere on the floor 0.5 mm. Before tiling, cut open a hole for the floor drain, approx. 60 mm smaller than the drain's diameter. Finish with a compatible clamp ring. Fix floor tiles with Kiilto Saneerauslaasti, Superfix DF, Kerapid, Lightfix, HighFlex S2 DF, Floorfix DF or Lattialaasti DF. Allow to dry properly and grout the tiles with Kiilto Lattiasaumalaasti. Seal vertical and horizontal corners as well as inlets with Kiilto Saniteettisilikoni.

Additional information

The information given in this product data sheet is based on our tests and our practical knowledge. The technical data is defined in standard conditions. Variations in local working conditions and methods will affect the product performance and result. We guarantee the high quality of our products according to our Quality Management System. No liability can be accepted from incorrect use of the product or prevailing conditions, over which we have no control. Thus, we cannot be held responsible for the final result. The correct use of the product presupposes that the user has made him/herself aware of the contents of the working instructions and procedure guide, if provided.

Environment and safety

Avoid unnecessary skin contact and exposure with the fresh product, use safety gloves. Refer to material safety data sheet. For information on product and package disposal, go to www.kiilto.com.

Certificates