Sikagard® WDE Primer

Meets the requirements of CFIA for use in food plants.

2 years when stored in original, unopened packaging.

Store in a dry place, protected from freezing at a temperature between 5°C and 32°C (41°F and 90°F).  Protect from freezing. If Sikagard® WDE Primer has frozen, contact Sika Canada.  

A+B: ~1.1 kg/L (~9.19 lb/US gal)

~0 g/L

A+B: ~900 cps

> 2.7 MPa (> 392 psi) (concrete failure)

Minimum 0 °C (32 °F)   Maximum 50 °C (122 °F)

A:B = 3:1 by volume

Condition product between 18 °C to 24 °C (65 °F to 75 °F) before use.

Minimum: 0 °C (32 °F) / Maximum: 30°C (86 °F)

Note: Mixing carried out under conditions where the Sikagard® WDE Primer temperature and ambient temperature are below 18°C (65°F) will result in reduced product workability and slower curing rates.

Maximum  85 % (during application and curing)

Substrate must be at least 3 °C (5 °F) above the dew point to reduce the risk of condensation, which may lead to adhesion failure or “blushing” on the floor finish.

Minimum: 0 °C (32 °F)  Maximum: 30°C (86 °F)

Note: Any attempt to apply Sikagard® WDE Primer at substrate temperature conditions less than 18 °C (65 °F) will result in an increase in viscosity and slower cure rates.

Moisture content of a concrete substrate must be below or equal to 6 % (pbw -part by weight) as measured with a Tramex® CME/CM Expert type concrete moisture meter on mechanically-prepared surface according to this product data sheet (preparation to ICRI / CSP 3 - 4).

~8 to 10 minutes

Note: If Neat Sikagard® WDE Primer Waiting / Overcoating Time has passed, the previous coat must be lightly sanded, to remove all gloss; vacuum cleaning and solvent wiping will be necessary to remove all traces of dust. The surface should be a uniform dullness, with no gloss present after clean-up and before applying the next coat.

Curing times will vary according to air and substrate temperature and relative humidity.

Protect from dampness, condensation and water contact during the initial 24 hour cure period.

Mechanical, chemical & physical properties will be fully achieved at full cure.

4 m²/L (160 ft²/US gal) per coat at 10 mils wft. 

Note: Actual coverage rates and material consumption will depend upon porosity and profile of substrates. Allowance must be also made for variation in film thickness or number of coats required. Test sections are recommended to establish correct coverage.

Concrete surfaces must be clean and sound. The compressive strength of the concrete substrate should be at least 25 MPa (3625 psi) at 28 days and a minimum of 1.5 MPa (217 psi) in tensile strength, at the time of the application.

Substrates must be free of contaminants such as dust, dirt, existing paint films, efflorescence, exudates, laitance, form, hydraulic or fuel oils, brake fluid, grease, fungus, mildew, biological residues or any other contaminants which may prohibit good bond or conditions of the substrate that may reduce the overall performances of Sikagard® WDE Primer.

Before work commences, examine the areas to be covered and report any improper condition(s) in writing to the general contractor, architect or engineer (or otherwise, the owner). User shall not proceed with the work until surfaces and conditions comply with the requirements indicated in this document; applicable industry standards; federal, provincial and local regulations, as well as good trade practices. By starting work, the Applicator/User acknowledges that the conditions are acceptable.

Prepare the surface by any appropriate mechanical means, in order to achieve a profile equivalent to a minimum of ICRI CSP 3 (note: ICRI CSP 4 will provide better overall performances where high shear stress from dynamic loads may be present or that can reasonably be expected).Whenever “shot-blasting” is utilized, be careful to leave concrete with a uniform texture. “Over-blasting” will result in reduced coverage rates of the primer and/or subsequent topcoats. The “shot blast” pattern may show through the last coat, known as “tracking”.

Repairs to cementitious substrates, filling of blowholes, levelling of irregularities, etc. should be carried out using an appropriate Sika profiling mortar. Contact Sika Technical Service for recommendations in writing.

Note: Contact Sika’s Technical Service for installation recommendations in writing concerning substrates or conditions not listed.

Mix Ratio: Components A:B = 3:1 (by volume)

IMPORTANT:

•  Do not hand mix Sikagard^® materials; mechanically mix only.  
•  Sikagard® WDE Primer must be applied as supplied. 

Pre-stir Components A and B separately, making sure all solids, are evenly distributed. Empty Component B (Hardener) in the correct mix ratio into Component A (Resin) or empty Component A into a suitably sized and clean pail and add Component B in the correct ratio. Blend the combined components thoroughly at low speed (300 - 450 rpm) for at least three (3) minutes using a drill fitted with an Exomixer® or Jiffy type paddle suited to the dimensions of the mixing container and keep the mixing paddle in the mix to avoid entrapping air. Take care not to introduce any air bubbles while mixing. Make sure the contents are completely mixed to avoid any weak or partially cured spots in the coating. During the mixing operation, scrape down the sides and bottom of the container with a flat or straight edge trowel at least once to ensure complete mixing. Do not attempt to attend to unmixed material that may gather on the sides of the mixing container while mechanical or electrical parts are in motion. When completely mixed, Sikagard® WDE Primer should be uniform in appearance and consistency.

Note: Mix only that quantity which can be used within its pot life at actual field temperature.

Sikagard® WDE Primer: The mixed resin should be applied at 4 m²/L (163 ft²/US gal) using a brush or roller when used as a primer for other Sika products. When it is used as a first coat of a build up system it is normal to broadcast Bell and MacKenzie Flint Silica # 32 or # 505 Silica sand to saturation at a rate of 1 - 1.5 kg/m² (20 - 30 lb/100 ft²), allow cure and use a broom to collect the excess sans followed by using a vacuum with a brush attachment before proceeding to the next step.

Sikagard® WDE Primer Mortar: Prime the concrete with the prepared mix of Sikagard® WDE Primer and apply mortar while still tacky. Mix 3.75 L (1 US gal) Sikagard® WDE Primer with 2 x 20 kg (44 lb) Sika® Aggregate PT to provide a hand trowel mortar. Apply mortar in accordance with good epoxy mortar practice, placing mortar wet on wet onto the primer and spread the mortar to the appropriate thickness using a large wood float, rake or screed box. Using a float or stainless steel finishing trowel, uniformly compact and smooth the surface. At all times take into consideration the fast-cure nature of the binder.

Clean all tools and equipment with a non-flammable solvent. Once hardened, product can only be removed mechanically.