Product Data Sheet Show all documents

Sikalastic®-680 AP

SINGLE COMPONENT HIGHLY ELASTIC POLYURETHANE WATERPROOFING MEMBRANE

Sikalastic®-680 AP is a single component, liquid applied polyurethane waterproofing membrane for concrete structures that will be covered by protective toppings. Sikalastic®-680 AP is flexible and provides a continuous seamless waterproofing membrane for a wide range of applications.

  • Excellent adhesion on concrete, render and masonry
  • High crack bridging ability
  • Good impact and abrasion resistance
  • Good chemical resistance
  • Non-toxic
  • Easy to use and quick drying.
Product Data Sheet Show all documents

Usage

  • As a waterproofing membrane on roofs, podiums, balconies bathrooms, pools, tanks and planters
  • As waterproofing coat for external wall, basements and foundations
  • As water barrier underplasters, screeds or tiles
 

Advantages

  • Excellent adhesion on concrete, render and masonry
  • High crack bridging ability
  • Good impact and abrasion resistance
  • Good chemical resistance
  • Non-toxic
  • Easy to use and quick drying.

Packaging

28 kg Pail

Colour

Black

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Resistance to root penetration under DIN 4062
Product Information

Chemical base

Polyurethane modified tar

Shelf life

9 months from date of production if stored properly in undamaged and unopened original sealed packaging.

Storage conditions

Store in cool and dry conditions. Protect from direct sunlight and frost

Density

~ 1.55 kg/l
System information

System Structure

Standard Coating System*
Sikalastic®-680 AP is applied in 2 or 3 coats

Total consumption: ≥ 1.4 - 2.1 kg/m2

*Sika® Reemat Premium must be locally applied at areas with high movement, irregular substrate or to bridge cracks, joints and seams on the substrate as well as for details.

Standard Reinforcement System

Sikalastic®-680 AP is applied in a base coat layer, reinforced with Sika® Reemat Premium and sealed with 1 - 2 coats of Sikalastic®-680 AP.

Total consumption: ≥ 1.8 - 2.5 kg/m2

Layer

Product

Comsumption

1. Primer

Sikalastic®-680 AP diluted with 5% Xylene**

≥ 0.25 kg/m2

2. 1st coat

Sikalastic®-680 AP

≥ 0.7 - 1.0 kg/m2 per
coat

3. ReinforcementSika® Reemat Premium-
4. 2nd coatSikalastic®-680 AP≥ 0.3 - 0.5 kg/m2 per coat
5. 3rd coatSikalastic®-680 AP≥ 0.6 - 0.7 kg/m2 per coat

**On very absorbent surfaces
Note:
1. Do not apply more than 0.75 kg/m2 of Sikalastic®-680 AP per coat for layers without reinforcement.
2. These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage.
Technical Information

Shore A Hardness

40

(ASTM D 2240)

Tensile Strength

≥ 1.2 N/mm²

(ASTM D 412)

Crack Bridging Ability

2mm 

(BS EN 14891)

Tensile Adhesion Strength

≥ 0.7 N/mm2

(ASTM D7234)

Application

Application Information

Ambient Air Temperature

+5 °C min / +45 °C max.

Drying time

~3 h (Tack free)

(at +25 °C / 60 % r.h)
Application steps

SUBSTRATE PREPARATION

All substrates must be structurally sound, stable, dry and clean (compressive strength: min. 25 N/mm2 and cohesive strength: min. 1.5 N/mm2). Smooth shiny surfaces are to be roughened while uneven surface to be leveled or filled first. All surfaces should be free of sharpness, loose materials, de-bonded coatings, curing compounds, release agents, wax residues, laitance, algae and moss, oils, dust, or any other bond inhibitors.
Structurally unsound layers and surface contaminants are to be mechanically removed by abrasive blasting, blast tracking, grinding or equivalent methods. Cracks and faulty joints should be repaired.
 

PRIMING


On very absorbent surfaces, a primer coat (dilute Sikalastic®-680 AP with 5% Xylene) should be applied on the concrete surface at consumption of 0.25-0.30 kg/m2, prior to the application of waterproofing membrane.

APPLICATION

  • Sikalastic®-680 AP can be applied by brush, roller, trowel, squeegee or airless spray directly onto the treated substrate. Apply subsequent coats at different directions to the previous coat.
  • Before applying any coating, the previous coat must be touch dry.
  • Subsequent coats should be applied within a maximum period of 24 hours.
  • The finished membrane should be protected from damage by other trades.

CLEANING OF TOOLS

Clean all tools and application equipment with Thinner C immediately after use. Hardened and/or cured material can only be removed mechanically

 

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