Kerakoll Active Prime Fix – Bulk Buy – Internal & External Use Rapid Universal Adhesion Promoter

Kerakoll Active Prime Fix extended information

Coverage: ≈ 0.1 – 0.2 kg/m²

Areas of Application

Intended use:

Preparation of absorbent or non-absorbent substrates before the laying of self-levelling and levelling products, mineral and cement- based adhesives, finishing products, plasters / renders and fluid mortars, in order to improve their adhesion to the substrate. Adjustment of the absorption of highly porous substrates before laying ceramic tiles with mineral and cement-based adhesives and before applying levelling products, finishing products, plasters/ renders and cement- and gypsum-based self- levelling products. Creation of a suitable barrier to neutralize the expansive chemical reaction of gypsum- and anhydrite-based substrates. For internal and external use.

Products suitable for overlaying:

• fluid, mineral mortars and fluid mortars
• mineral adhesives and cement-based adhesives
• cement and gypsum-based finishing, levelling and self-levelling products
• cement and gypsum-based plasters/renders
• rainproof waterproofing products from the Bioscud range

Substrates:

• ceramic floors and coverings, marble tiles, natural stone
• flooring in concrete smoothed with circular grinding machinery
• compact and firm cement- and anhydrite-based screeds
• prefabricated concrete and fresh concrete castings
• wooden panellings
• hardwood floors
• gypsum brick and plasterboard panels
• substrates in metal on rigid supporting surfaces – flooring with residual traces of resin-base adhesives
• flooring in epoxy resin
• varnishes
• rigid PVC floors and coverings

Do not use on high flexible substrates or substrates which may present a risk of strong dimensional movement; on substrates which are moistened or subject to moisture rising, for overlaying of mortars and plasters/renders with semi-dry consistency and high grain size; directly on cement-, gypsum- or anhydrite- based substrates where bleeding is present; on magnesian substrates.

Kerakoll Active Prime Fix Instructions

Preparation of substrates:

In general, substrates must be free from dust, oil and grease, free from moisture rising, with no loose, flaky or imperfectly anchored parts such as residues of cement, lime, varnishes and adhesives, which must be completely removed. In particular, surface treatments of certain types of material such as waxes for resilient materials, marble floor tiles, hardwood floors, concrete parting compounds and sheet-metal oils must be completely removed. Varnishes, paints and adhesives must be removed by mechanical means in those cases where they can be removed easily, leaving only the parts which are well anchored to the substrate. Absorbent substrates must be compact, firm and with no loose or friable areas. Cement-, gypsum- and anhydrite-based self- levelling substrates may present laitance or a powdery surface.

Sand with a large-grain abrasive in order to remove bleeding and then remove the dust. Plasters with a gypsum base must present a residual humidity ≤ 1% and screeds with an anhydrite base ≤ 0.5%, both of which should be measured with a carbide hygrometer.

Preparation:

When applying on non-absorbent substrates, stir briefly before use in order to homogenize the product. Active Prime Fix is immediately ready to use.

For applications on walls and floors as a surface isolation to neutralize the expansive chemical reaction of compact and laitance free gypsum- or anhydrite-based plasters / renders and screeds
in contact with cement-based products: apply Kerakoll Active Prime Fix pure.

In case of gypsum- or anhydrite-based substrates presenting a powdery surface, apply Kerakoll Active Prime Fix diluted with clean water up to the ratio 1:3 to improve penetration of the primer into the substrate; after it has completely dried, apply a second coat of pure Active Prime Fix. For compact, low-absorption substrates of any kind, apply Active Prime Fix pure or diluted 1 : 2 with clean water.

Dilute Active Prime Fix with clean water up to a 1:4 ratio to reduce and regulate the absorption of water of highly porous substrates or to bind dust surfaces.

Pour the required quantity of water needed to dilute the product into a bucket, then add Active Prime Fix according to the indicated ratio. Mix briefly before use.

Kerakoll Active Prime Fix Application

Dip the roller or the flat brush into the container and lay an even quantity. Subsequently, repeat the operation on the same surface, with a pass perpendicular to the first. Proceed in this manner until the substrate has been covered completely.

Before overlaying, wait until the film has completely hardened (approx. 30-60 minutes at +23 °C, 50% R.H.).

Cleaning

Residual traces of Kerakoll Active Prime Fix can be removed from tools using water before the product hardens.

NB

After applying Active Prime Fix and before laying, check if the moisture content of the substrate is suitable for the type of covering selected. Applying Kerakoll Active Prime Fix on absorbent. substrates improves the workability of finishing and levelling products; it is essential when applying self-levelling products, especially low thickness ones.

Kerakoll Active Prime Fix technical data

NB

• Product for professional use
• abide by any standards and national regulations
• do not apply on roughened substrates or substrates which require heavy thicknesses of product
• make sure the substrate is perfectly clean, dry and compact
• respect the indicated uses
• check substrate adhesion before overlaying
• do not add binders, inert materials or additives
• if the product has been washed away or removed mechanically, it will have to be replaced by a further application
• do not use as a promoter for plasters, mortars and screeds with semi-dry consistency or high granulometric grading
• do not apply on substrates which present a high degree of deformability or thermal expansion
• if necessary, ask for the safety data sheet
• for any other issues, please contact the Kerakoll Worldwide Global Service