Sikalastic®-680 N+

Elongation at break

Polyurethane

12 months from date of production

Stored properly in undamaged and unopened original sealed packaging in
cool and dry conditions. Protect from direct sunlight and frost.

Approx. 1.3 kg/litre

ECONOMICAL COATINGS SYSTEM
e.g. Waterproofing coat to the substrate behind cladding: ~ 0.65 kg/m2/coat (1-2 coats)

STANDARD COATINGS SYSTEM
~ 1.8 kg/m2 in one or more coats (DFT@ ~ 1.5 mm)

REINFORCED COATING SYSTEM (SIKA® GLASS FABRIC 55G)

(Total DFT of coating system @ ~ 2.0 mm)
*For exposed system or on very absorbent surfaces only
*For roof refurbishment direct apply Sikalastic®-680 N+ on top of existing tiles, use Sikafloor®156 as primer.

• Alternative Sika reinforcement options can be used.
• These figures are theoretical and do not allow for any additional material
  due to surface porosity, surface profile, variations in level and wastage
  etc.

*after 10 cycles of weathering closing to a width of 1 mm

Good resistant to
▪ Agueous starch
▪ Bleach
▪ Ethanol 75 %
▪ Sodium Hydroxide 24 %

5 ^oC to 40 ^oC

≤ 6 % parts by weight.
The substrate must be visibly dry with no standing moisture.

Approx. 1 hour (@ 25 oC & RH 75 % for foot traffic)

1–4 hours depend on the coating thickness and temperature of substrate

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 sharp protrudings, loose materials, de-bonded coatings, curing membranes, release agents, wax residues, laitance, algae and moss, oils, dust, etc. 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 (Sikalastic^®-500 Acrylic Primer HK) should be applied on the concrete surface prior to the application of waterproofing membrane. Care should be taken to ensure the required membrance final dry film thickness is achieved.

Application Method / Tool

Sikalastic®-680 N+ 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 max. period of 24 hours. The finished membrane should be protected from damage by other trades.
The reinforcement, Sika® Glass Fabric 55G or Sikalastic ® Fleece-80 should be pressed into the 1st coat of Sikalastic®-680 N+ whilst it is still wet. Depending on the ambient temperature within an hour, the 1st coat will be foot trafficeable. Then apply another 1 or 2 coats of Sikalastic®-680 N+ to completely cover the reinforcement.

"Check the weather condition of the following 3 days from the day planned to apply the product. If raining may happen then do not start the work. Avoid the fresh apply Sikalastic-680 N+ contact with water within the 3days curing period. Cold temperature may need longer curing time."

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