Sikagard®-65 WN Primer

Water dispersed epoxy

12 months from date of production

The product must be stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +5 °C and +30 °C.

All density values at +23 °C.

~70 %

~56 %

Part A : B = 3 : 1 by weight

~110 - 180 µm per coat (dry film thickness)

+10 °C min. / +35 °C max.

85 % r.h. max.

Beware of condensation!
The substrate and uncured floor must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product.

+10 °C min. / +35 °C max.

Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method. Always confirm substrate moisture content prior to the application of the primer:

• < 4 % for impervious resin finishes. No rising moisture according to ASTM D 4263 test (Polyethylene sheet).
• Can be applied on matt damp green concrete when overcoating with the Sikafloor® EpoCem® range without standing water on the substrate.

All above values at 75 % relative air humidity.

Caution: Expiry of pot life without visible change.

Before applying Sikagard®-65 WN onto Sikagard®-65 WN Primer allow:

At low temperatures and / or high humidity curing time will increase.
Apply subsequent coats only to tack free primer.

0.3 - 0.5 kg/m²/coat (2.0 - 3.3 m² / kg / coat)

Sikagard®-65 WN Primer, diluted with water 10 % by weight for the first coat.
Undiluted for the second coat.
This figure is theoretical and does not include for any additional material required due to surface porosity, surface profile, variation in level or wastage, etc.

• The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm²) with a minimum pull off strength of 1.5 N/mm².

• The substrate must be clean, dry and free of all contaminants such as dirt, oil, grease, coatings and surface treatments, etc.
• Concrete substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and achieve an open textured surface.
• Weak concrete must be removed and surface defects such as blow holes and voids must be fully exposed.
• Repairs to the substrate, filling of blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials.
• All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush or vacuum.

Prior to mixing, thoroughly stir part A (resin), then add all of part B (hardener) and mix both liquid parts thoroughly for one minute until a uniform mix has been achieved.
When parts A and B have been mixed for one minute for the first coat, slowly add 10 % of clean water while mixing continues for a further two minutes, until a fully homogenous mix has been achieved.
For the second coat, do not add additional water, but continue the mixing for a total of 3 minutes until a fully homogenous mix has been achieved.
To ensure thorough mixing of both coats, after the minimum 3 minutes mixing, pour the mixed material into another container carefully scraping the sides and mixing paddle with a spatula and then mix again briefly to ensure complete and thorough mixing.
Excessive mixing must also be avoided to minimise air entrainment.

Mixing Tools

Low speed electric stirrer (~ 300 - 400 rpm)

Apply Sikagard®-65 WN Primer by suitable brush, roller or trowel and overwork with a roller.
Caution
The end of the product’s pot life is not noticeable! Respect the limitations mentioned. Discard material not used within indicated pot life.

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