Sikagard® CRV-20

Component A - six months ; component B - 24 months: in original, undamaged and unopened packaging.

Store dry between 5 °C and 32 °C (41 °F and 89 °F) off the ground on pallets or similar. Protect Sikagard® CRV-20 from freezing. If frozen, discard.

~1.08 kg/L (~9.0 lb/US gal.)  A+B Mixed

≤ 60 g/L

Tensile Modulus:

Heat Distortion Temperature: 

Consult Sika Canada

Condition product at temperatures between 18 °C and 24 °C (65 °F to 75 °F) before using.

Minimum 15 °C (59 °F)   Maximum 30 °C (86 °F)

Maximum 85 % (during application and cure)

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. Be aware that the substrate temperature may be lower than the ambient temperature.

Minimum 15 °C (59 °F)   Maximum 30 °C (86 °F)

Mixing and application attempted at material, ambient and/or substrate temperature conditions less than 18 °C (65 °F) will result in a decrease in product workability and slower cure rates.

Moisture content of a concrete substrate at the time of application of Sikagard® WDE Primer must be < 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). Do not apply to concrete substrate with moisture levels exceeding 6 % (pbw – part by weight) as measured with Tramex® CME/CMExpert type concrete moisture meter. If moisture content of concrete substrate exceeds 6 % (pbw – part by weight) as measured with Tramex® CME/CMExpert type concrete moisture meter,use Sikafloor®-81 EpoCem®CA on horizontal surfaces and Sikagard®-75 EpoCem®CA on walls and overhead applications.

NOTE:  Vinyl Ester materials do not bond well to damp substrates. Sikagard® CRV-20 must be applied over a concrete substrate primed with Sikagard® WDE Primer as recommended in the “Application” section.

~12 minutes  (Novolac Vinyl Ester Resin + Benzoyl Peroxide Powder)

Curing time will vary according to air and substrate temperatures and relative humidity.

Freshly applied material should be protected from dampness, condensation and water for at least 24 hours.

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

Yield

Concrete Substrates / Smooth Coating:

Maximum build per coat for Sikagard® CRV-20 on vertical surfaces is 10 mil wft. Three coats may be required to produce a smooth coating vertically.

Concrete Substrates / Broadcast Build-Up Surfacing:

Steel Substrates / Smooth Coating:

Maximum build per coat for Sikagard® CRV-20 on vertical surfaces is 10 mil. Three coats may be required to produce a smooth coating vertically.

Steel Substrates / Broadcast Build-up Surfacing:

NOTE: Sikagard^® WDE Prime Coat shown below is only required on steel substrates to produce a thicker wear coarse layer in areas subject to heavy traffic.

Do not hand mix Sikagard® materials. Mechanically mix only.  Sika recommends mixing only full units because it is difficult to accurately split in to smaller quantities.

Do not thin this product. Addition of thinners (e.g. water, solvent, etc.) will slow cure and reduce ultimate properties of this product. Use of thinners will void any applicable Sika® warranty

Pre-stir resin component thoroughly and do not allow mixed material to stand and settle. Failure to pre-stir and keep product agitated will result in variation in gloss levels appearance and performance.

Sikagard® CRV-20 is supplied as two-components: a resin and a powder. Thoroughly stir Component A to ensure all solids, including pigments, are evenly dispersed. While stirring, periodically check interior of can with stir-stick or similar to again ensure dispersal and distribution of solids throughout resin. Add Component B to pre-stirred Component A and thoroughly mix for one (1) minute with a low-speed drill (200-300 rpm) to minimise air entrapment. Use an Exomixer^®-type mixing paddle (recommended model) of suitable size for the mixing vessel. During the mixing operations, scrape down the sides and bottom of the container with a flat- or straight-edge trowel at least once to ensure complete mixing. When completely mixed, Sikagard® CRV-20 should be uniform in colour and consistency.

See “Yield Section” of this Product Data Sheet for specific application thickness and number of coats recommended.

Concrete Substrates / Smooth Coating: This provides a smooth, easy-to-maintain system.
Primer Coat: Apply Sikagard^® WDE Primer onto concrete substrate using a brush, roller or squeegee to a uniform coverage without ponding. Allow primer to cure for a minimum of 6 hours at 20 °C (68 °F) or 10 hours at 10 °C (50 °F) before over-coating with Sikagard® CRV-20.
1st Coat: Once the Sikagard^® WDE Primer has cured, apply Sikagard® CRV-20 using a brush, roller or squeegee to a uniform coverage without ponding.
2nd Coat: Once 1st coat is tack-free, apply a second coat of Sikagard® CRV-20 using a brush, roller or squeegee to a uniform coverage without ponding.
NOTE: If over-coating of Sikagard^® WDE Primer with Sikagard® CRV-20 is attempted before the necessary curing-time has elapsed, the reactive components in the Sikagard® CRV-20 will act as a solvent, softening the Sikagard^® WDE Primer, retarding or stopping the cure of the Sikagard® CRV-20. For additional information, see Sika’s “Sikagard^® CRV 10 and CRV-20 - Properties and Application Guidelines” Technical Bulletin.

Concrete Substrates / Broadcast Build-up Surfacing: This method produces a durable, textured, slip-resistant, improved traction finish.
Primer Coat: Apply Sikagard^® WDE Primer onto concrete substrate using a brush, roller or squeegee to a uniform coverage without ponding. Broadcast the selected aggregate (selected for texture) into the wet primer to rejection.
Broadcast Coat: Once the primer coat has sufficiently cured to allow foot-traffic, sweep-up and vacuum the loose, unbonded aggregate. Apply the broadcast coat of Sikagard® CRV-20 using a notched squeegee or trowel and backroll to a uniform coverage. Broadcast the selected aggregate (selected for texture) into the wet resin to rejection.
Top Coat: Once the broadcast coat has sufficiently cured to allow foot-traffic, sweep-up and vacuum the loose unbonded aggregate. Apply the top coat of Sikagard® CRV-20 using a squeegee, followed by back rolling to provide a uniform texture and finish.

 
Steel Substrates:
Consolidation and sealing of common steel substrates with Sikagard® WDE Primer is not usually required under typical circumstances. However, due to variations in steel quality, surface condition, surface preparation and ambient conditions, reference test areas are recommended to determine whether priming is required to prevent the possibility of debonding, blisters, pin-holes or other defects. Contact Canada. Application of Sikagard® CRV-20 over properly-prepared steel surfaces is typically the same procedure as outlined above for both Smooth Coating and Broadcast Build up Surfacing over concrete substrates, excluding the use of Sikagard^® WDE primer, unless a thicker wear coarse layer is required to resist heavy traffic.

See “Consumption” section of this Product Data Sheet above for specific application thickness and number of coats recommended.

IMPORTANT INSTALLATION REQUIREMENTS!

1. Over-coating Sikagard® WDE Primer with Sikagard® CRV-20 attempted before the necessary curing-time has elapsed, will soften the Sikagard® WDE Primer, retarding or stopping the cure of the Sikagard® CRV-20.
2. Sikagard® CRV-20, will not cure properly in the presence of styrene vapours given off during initial cure. To achieve proper cure, a small amount of air movement causing a fresh air exchange and displacing the styrene vapours is mandatory.
3. Sikagard® CRV-20, will not cure uniformly when applied at less than 10 mil w.f.t. per coat.
4. Sikagard® CRV-20 is very fast curing. Do not over work the surface during application.
5. Due care should be exercised during application and initial cure as the product is flammable; users should refer to the most recent SAFETY DATA SHEET for advice on the safe handling, storage and disposal.

For additional information, see Technical Bulletin - Sikagard® CRV-20 Properties and Application Guidelines.

Clean all tools and equipment immediately with a MIBK-based product. Once hardened, product can only be removed mechanically.