Description
Kerakoll Active Prime Fix Primer is a rapid universal adhesion promoter for self-levelling products, cement-based adhesives, finishing products and plasters/renders. It is single-component, water-based, for internal and external use.
It has active cross-link which develops total compatibility with absorbent and non-absorbent substrates, and guarantees maximum adhesion when overlaying with cement-, and gypsum-based mineral products. It is extremely fluid, and has high stabilizing and impregnating power.
Kerakoll Active Prime Fix Primer is suitable for absorbent and non-absorbent substrates, is rapid drying and is also ideal for surface consolidating treatment of dry, dusty substrates.
This primer reduces and regulates the absorption of porous substrates, extending the workability of levelling and self-levelling products and mineral adhesives. It is suitable to neutralize the expansive chemical reaction of gypsum- and anhydrite-based substrates in contact with self-levelling products, adhesives, finishing products and mineral plasters/renders.
Intended use:
Kerakoll Active Prime Fix Primer is designed for the 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. Kerakoll Active Prime Fix Primer creates 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
– flooring grade plywood
– 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
– flooring grade asphalt / bitumen
Do not use Kerakoll Active Prime Fix Primer 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 or calcium sulphate-based substrates where bleeding is present, on magnesian substrates.
Preparation of substrates:
In general, prior to using Kerakoll Active Prime Fix Primer, 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- and calcium sulphate-based self levelling substrates must not show bleeding or have a powdery surface. Mechanically abrade the surface to remove all laitance and then remove the dust with a vacuum.
Preparation:
When applying on non-absorbent substrates, mix briefly before use in order to homogenize the product. Kerakoll Active Prime Fix Primer is immediately ready to use. In case of calcium sulphate-based substrates sand the surface to remove any dust/laitance and then apply Kerakoll Active Prime Fix Primer 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 undiluted.
For compact, low-absorption substrates, apply two coats of Active Prime Fix diluted 1:2 with clean water.
Dilute Kerakoll Active Prime Fix Primer with clean water up to a 1:3 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 Kerakoll Active Prime Fix Primer according to the indicated ratio. Mix briefly before use.
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, allow Kerakoll Active Prime Fix Primer to become touch dry (approx. 15 minutes).
Special notes:
After applying Kerakoll Active Prime Fix Primer and before laying, check if the moisture content of the substrate is suitable for the type of covering selected. Applying 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.
Technical Data:
Appearance: light blue liquid
Pack: 1 kg bottles – 5 kg cans
Specific weight: ≈ 1.01 kg/dm³
Viscosity: ≈ 60 mPa · s, rotor 2 RPM 100 Brookfield method
pH: ≈ 7.5
Temperature range for application: from +5 °C to +35 °C
Waiting time before laying: ≈ 15 min.
Coverage: ≈ 0.1 – 0.2 kg/m²
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