Topciment primers and substrate preparation

Primacem ABS is a primer for absorbent substrates, such as suitable cementitious, plaster and plasterboard surfaces. Primacem Plus is a bonding primer for non-absorbent or low-absorption substrates, including sound ceramic coverings. They prepare the bond between the substrate and the next coating.
The choice is not determined simply by whether the room is a bathroom or kitchen. Assess the actual surface, contamination, absorption and selected system. Neither primer replaces removal of loose layers, levelling of tile joints or required waterproofing.

Primacem GRIP is an aggregate-filled bonding primer that creates a textured contact surface. It is used on compatible smooth or low-absorption substrates when the next material requires this type of preparation. It has interior and exterior applications.
GRIP is not a levelling compound and does not conceal substantial irregularities. It should not automatically be exchanged for Plus merely because their uses sound similar: the next coating determines the required texture and compatibility. Clean the substrate and check its soundness before priming.

Primacem Fix is a bonding primer with residual tack, intended to improve adhesion between compatible old and new mortar or concrete surfaces. Its tack is part of its function and is not necessarily a sign of incorrect drying.
This does not make it a universal primer for every microcement system. Check the next coat, permitted application interval and substrate condition. Do not use it to glue down loose tiles or as a stand-alone repair for a weak, friable layer.

Both are two-component epoxy products, but their functions differ. Primapox 100 Fluid is a low-viscosity primer and binder for suitable mineral substrates, subject to a substrate-moisture limit. Primapox 100 Barrier is developed as a barrier against rising moisture and water vapour within a specified build-up.
Barrier is not simply a “stronger Fluid”. Selection requires moisture measurement, identification of its source and checking the subsequent coats. The two products have different A/B ratios and their components must not be exchanged.

First establish whether the cause is residual construction moisture, rising damp, condensation or an active leak. These require different solutions. An ordinary bonding primer does not remove the moisture source. A specialised epoxy barrier is used only on a permitted substrate within a correctly installed system.
Before applying a decorative coating, assess moisture, strength, cracks and details. Do not attempt to seal an active leak or unstable screed with an arbitrary primer: the subsequent layers may blister, stain or debond.

Yes. Ordinary joints between sound tiles are levelled with a suitable filler so that relief or differences in absorption do not show through the decorative coating. Primacem Joint is a filling paste for this preparation; despite the range name, it is not a liquid bonding primer.
This does not apply to movement or structural joints, which must remain functional. Filling width and depth, drying and sanding must suit the material. Loose tiles must first be repaired or removed.

No. The primer beneath microcement prepares its bond to the substrate. Acricem primarily serves as the liquid component of particular two-component microcements and also has separately specified priming uses. Presealer is applied over installed microcement before the final protective varnish in the relevant systems.
For pools, Acricem Pool performs the dedicated roles within Atlanttic. Similar appearance or a shared water-based formulation does not establish interchangeability. Specify both the existing substrate and the exact coating range to be applied.

Quantity depends on area, absorption, roughness and the primer’s function. A consumption rate for ordinary bonding cannot automatically be used for a system that must also act as a moisture barrier. Two-component products require calculation of the complete A + B mixture.
Observe both minimum and maximum intervals before the next coat. Some primers remain tacky, others need to dry, and certain epoxy systems require a quartz-sand broadcast. The compatible system determines the exact sequence.