SikaTop®-540 Seal HK

FLEXIBLE, POLYMER CEMENT WATERPROOFING SLURRY

SikaTop®-540 Seal HK is a two part, prepacked system, consisting of a liquid polymer as Part A and a premixed powder as Part B. The two parts on mixing yield a brushable, smooth slurry with excellent bond to most substrates. The product is based on selected synthetic resins and cements.

  • Polymer modified – Improved bond strength on a variety of substrates.
  • Permeable to water vapours - Allows surface to breath, preventing build-up of moisture in structure, reducing maintenance.
  • Flexible - Can withstand moderate movement of hairline cracks. 
  • Weather resistant - Suitable for use in exposed conditions.
  • Brushable consistency - Easily applied by brush or spray.
  • Non-toxic – Can be applied onto surfaces in contact with drinking water.
Product Data Sheet Show all documents

Overview

Usage

SikaTop®-540 Seal HK is designed to be used as an effective waterproofing membrane on a variety of substrates. Applications include:
  • Waterproof coatings to the internal faces of water tanks, sumps, reservoirs, planter boxes etc., before tiling or other surface finishing.
  • Treating terraces, balconies, kitchen and toilet floors as a sandwich treatment, to prevent water ingress.
  • Treating bridge and flyover decks before wearing course to protect concrete from rainwater ingress.  

Advantages

  • Polymer modified – Improved bond strength on a variety of substrates.
  • Permeable to water vapours - Allows surface to breath, preventing build-up of moisture in structure, reducing maintenance.
  • Flexible - Can withstand moderate movement of hairline cracks. 
  • Weather resistant - Suitable for use in exposed conditions.
  • Brushable consistency - Easily applied by brush or spray.
  • Non-toxic – Can be applied onto surfaces in contact with drinking water.

Packaging

18 kg set (Part A - Liquid: 5 kg in a plastic container, Part B - Powder: 13 kg in a paper bag)

Colour

Component A: Liquid / White
Component B: Powder / Grey

Product Details

Shelf Life

12 months from date of production if stored properly in unopened, original packaging.

Storage Conditions

Please store at temperature from 5°C to 35°C. Do not store in direct sunlight and avoid allowing the material to freeze which will render the material unusable. 

Volatile Organic Compound (VOC) Content

<2.0 g/L

Tensile Strength

> 1MPa

Elongation

>50%

Tensile Adhesion Strength

> 1.0 MPa

Application

Mixing Ratio

Part A : B = 5 : 13 (parts by weight)

Ambient Air Temperature

>5 °C

Consumption

The recommended coverage of SikaTop®-540 Seal HK is 1 kg/m² per coat to obtain an approximate wet film thickness of 0.8 mm (± 0.08mm).

Actual coverage depends upon the method of application, the texture and porosity of the surface.

Therefore material requirement is approximately 2 kg/m² for a total dry film thickness of 1 mm (± 0.1mm) in two coatings.

Note: use only complete pack.  

SUBSTRATE PREPARATION

Correct substrate preparation is critical for optimum performance. Surfaces should be structurally sound direct tensile strength of more than 1.5 N/mm2 via a pull off tester with a load rate of 100N/s), clean, and free from laitance, loose particles, oil and grease, old coatings, curing compounds or any other contaminants. Remove oil or grease and wax contaminants by scrubbing with industrial grade detergent or degreasing compounds before mechanical preparation. Cement laitance, loose particles, mold release agents, curing membranes and other contaminants must be removed from the surface by shot-blasting, grinding or scarifying followed by vacuum cleaning.

MIXING

Mechanical mixing is necessary. A slow speed (300 rpm), heavy duty electric drill with a wing type paddle is recommended. Keeping the mixer running, add the Part B slowly to Part A in a clean pail. Mix for at least 3 minutes to get a lump-free homogenous mix. While continuing to mix, add all of the remainder of Part A if applying on a horizontal surface, or a part of it if applying on vertical surfaces till the required consistency is obtained. Allow to stand for 2-3 minutes and remix before application. 

APPLICATION

Whilst the substrate is still damp from saturation, apply the first coat. Leave to harden for approximately 4-8 hours at the temperatures above 20 oC before applying the second coat.
For slurry consistency, apply with a hard plastic bristled brush, broom or by trowel.
For floor applications, to avoid risk of damage to the previous coats, it is recommended to apply the next coat after 24 hours.
If the subsequent coat is applied 12 hours or later, the slightly prewetted, preferably using a fine spraying.
For more details, please refer to our Technical Service Department.

CURING TREATMENT

SikaTop®-540 Seal HK must be protected against rapid drying due to direct sun exposure, high temperatures or wind. Curing by wet burlap, polyethylene sheet or a curing compound is recommended. 

CLEANING OF TOOLS

Clean tools using water and rags before the resin system hardens. Hardened material can only be removed mechanically. 

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