Product Data Sheet Show all documents

Sikalastic®-668 Dampflex

(former Davco® K10 Dampflex)

POLYURETHANE-MODIFIED WATERPROOFING MEMBRANE

Sikalastic®-668 Dampflex is a one-part water-based polyurethane-modified concealed waterproofing and sealing membrane that is ready-to-use from the container. 

  • One part waterproofing membrane - easy to use directly out of the container.
  • High flexibility, enabling it to cater for limited floor movement while absorbing vibration.
  • Prevents surface water penetration and absorption when applied correctly.
  • Water-based product,  therefore it is non-toxic and non-flammable.
Product Data Sheet Show all documents

Usage

Sikalastic®-668 Dampflex provides a seamless waterproofing system which is ideal for use in toilets, showers and bathrooms prior to tiling. It is also suitable to be used to waterproof terraces & balconies, and all interior wet areas.  

Advantages

  • One part waterproofing membrane - easy to use directly out of the container.
  • High flexibility, enabling it to cater for limited floor movement while absorbing vibration.
  • Prevents surface water penetration and absorption when applied correctly.
  • Water-based product,  therefore it is non-toxic and non-flammable.

Packaging

20 ltr/pail

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Singapore Green Building Product (Leader) Cert. No. SGBP 4186
Product Information

Shelf Life

12 months from the date of production

Storage Conditions

Store properly in original, unopened and undamaged sealed packaging in dry conditions. Keep away from direct sunlight and frost.

Specific gravity

1.40 ± 0.05 kg/ltr
Technical Information

Shore Hardness

≥ 35 (after 2 hours)

(ASTM D2240)

Tensile Strength

Before Ageing≥ 1.2 N/mm²
After Ageing (50 °C) ≥ 1.0 N/mm²
After immersion in 0.50 % NaOCl, 1.25 % NH4OH
or 3.70 % HCl for 72 hrs		≥ 1.0 N/mm²

Elongation

Before Ageing≥ 150 %
After Ageing (50 °C)≥ 120 %
After immersion in 0.50 % NaOCl, 1.25 % NH4OH
or 3.70 % HCl for 72 hrs		≥ 120 %

Tensile Adhesion Strength

After 3 days≥ 0.2 N/mm²

Crack Bridging Ability

No crack @ 2 mm width.

No crack after 10 cycles of stretching and closing to a width of 1 mm.

Water Penetration under Pressure

0

Application

Application Information

Drying Time

< 60 min

(Set to touch @ lab condition)
Consumption

Consumption

20.0 ltr of Sikalastic®-668 Dampflex will cover approximately 25 m² at thickness 700 micron (wet film) depending upon site conditions.
Application steps

SUBSTRATE PREPARATION

  • All surfaces must be structurally sound, dry and free from dust, grease, wax, oil, curing compounds and other loose contaminating materials.
  • All loose mortar or plaster, etc must be removed and then the entire area cleaned to remove dust and dirt.
  • Remove all protrusions from the surface, which may pierce the applied membrane.
  • All new concrete slabs should be allowed to cure for at least 28 days before applying Sikalastic®-668 Dampflex
  • For old concrete, if necessary, clean the surface with a strong detergent or degreaser and remove all residue with water using a high-pressure hose. Allow the surface to dry thoroughly before applying Sikalastic®-668 Dampflex.
  • Newly rendered surfaces must be allowed to cure for at least 7 days.

 

APPLICATION

  • Apply the area using either a roller or brush, with Sikalastic®-668 Dampflex, directly from the can. Do not dilute as product is supplied ready to use.
  • Allow the first coat to dry for 1 - 2 hours (depending on ambient temperature and humidity). Apply a second coat and allow it to dry for about 4 hours.
  • A minimum of 2 coats should be applied. A third coat may be necessary to ensure that the whole surface is uniformly applied and no pinholes are left on the surface.
  • Ponding test can be carried out 24 hours after application of final coat. Sikalastic®-668 Dampflex must be protected by rendering or screeding after application. 
  • Ensure sufficient falls are provided to prevent ponding of water. 
  • Do not apply if temperature is in excess of 45 °C or less than 10 °C 
  • Do not add sand to the Sikalastic®-668 Dampflex as this will reduce flexibility and could cause cracking.
  • Do not use where negative hydrostatic pressure is evident.

CLEANING OF TOOLS

Tools and excess Sikalastic®-668 Dampflex can be cleaned up with water while it is still wet.

 

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