Sikafloor® BC 375 NAS

CE marking and declaration of performance based on EN 13813:2002 Screed material and floor screeds — Screed material — Properties and requirements — Synthetic resin screed material

Under the specified storage conditions the material has a shelf life of 18 months. For maximum shelf life under these conditions, see “Best before” label.

Store in original drums, under dry conditions and a temperature ranging from 15 - 25°C. Do not expose to direct sunlight and keep the temperature within the above mentioned range.

100 : 22

Approx. 2.0 – 2.5 kg/m²

The consumption may not be below or over the above value to ensure the conductivity. If necessary, the substrate must be pre-levelled.

MECHANICAL SUBSTRATE PREPARATION

IMPORTANT

Surface defects due to voids in the substrate:

Voids and blow holes in the substrate will weaken the surface and damage the covering Product if not repaired during the preparation process.

1. Fully expose blow holes and voids during surface preparation to identify the required repairs.

2. Remove weak cementitious substrates.

3. Prepare cementitious substrates mechanically using abrasive blast cleaning, abrasive planing or scarifying equipment to remove cement laitance.

4. Before applying thin layer resins, remove high spots by grinding.

5. Use industrial vacuuming equipment to remove all dust, loose and friable material from the application surface before applying the Product.

6. Use products from the Sikafloor® and Sikadur® range of materials to level the surface or fill cracks, blow holes and voids.

Substrate levelling for conductive floors:

Note: The concrete or screed substrate has to be primed or levelled in order to achieve an even surface. Unevenness influences the film thickness and thus, the conductivity.

Contact Sika® Technical Services for additional information on products for levelling and repairing defects.

SUBSTRATE PREPARATION OF NON-CEMENTITIOUS SUBSTRATES

For information on substrate preparation of non-cementitious substrates, contact Sika® Technical Services.

Before mixing, precondition both A and B components to a temperature of approximately 15 to 25°C. Mix first the part B separately in order to ensure the homogeneity of the conductive fibers. Pour the entire contents of part B into the container of part A. It is important to ensure that the component B completely runs out with the conductive fibers. If necessary, part B must be scratched out with the last conductive fibers.

DO NOT MIX BY HAND. Mix with a mechanical drill and paddle at a very low speed (ca. 300 rpm) for at least 3 minutes. Scrape the sides and the bottom of the container several times to ensure complete mixing. Keep the mixer blades submerged in the coating to avoid introducing air bubbles. DO NOT WORK OUT OF THE ORIGINAL CONTAINER.

IMPORTANT

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

IMPORTANT

Protect from moisture After application, protect the Product from damp, condensation and direct water contact for at least 24 hours.

IMPORTANT

Uncured material reacts with water of any kind, which leads to foaming.

1. During the application, wear head and wrist bands to avoid sweat falling onto the uncured material.

IMPORTANT

Do not apply on substrates with rising moisture.

IMPORTANT

Damaged finish due to heating with fossil fuel heaters: Fossil fuel heaters powered by gas, oil or paraffin produce large quantities of both carbon dioxide and water vapour, which may adversely affect the finish.

1. For temporary heating, use only electrically powered warm air blower systems. Do not use gas, oil, paraffin or other fossil fuel heaters.

IMPORTANT

Indentations in resin due to high temperature combined with high point loading: Under certain conditions, underfloor heating or high ambient temperatures combined with high point loading may lead to indentations in the resin.

IMPORTANT

Maximum layer thickness The wearing layer must be ~1.5 mm thick. A layer that is too thick (more than 2.5 kg/m²) reduces conductivity.

SELF-SMOOTHING WEARING LAYER

Preconditions

The substrate moisture content, relative humidity and dew point are appropriate for application.

IMPORTANT

Only start the application of the Product after the conductive priming coat has completely dried tack-free.

1. Pour the mixed Product onto the surface. The consumption is specified in Application Information.

2. Apply the Product evenly over the surface with a serrated trowel or pin leveller.

3. To achieve a smooth finish, smooth the surface with the flat side of a trowel.

4. Immediately steel spike roller the surface in two directions at right angles to each other.

Note: Pass the roller once in each direction to remove trowel marks and aid air release.

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