A detailed preparation plan distinguishing filling, sanding, cleaning and priming on new plaster, concrete and refurbished walls.
Separate smoothness from adhesion
A smooth-looking wall is not necessarily ready for paint. Dust, weak plaster and residues can affect adhesion. Filler corrects surface geometry, while a primer may regulate absorbency or support compatibility. The two materials are not alternatives.
Map the limits of each repair
Mark repaired areas and check their level against the surrounding wall. Filling only the depression may leave visible boundaries under oblique viewing. Complete drying, sanding and dust removal in sequence; do not rush subsequent coats over unready filler.
Do not treat concrete as plaster
For exposed concrete, assess smoothness, absorbency and possible release-agent residues. A reference to concrete in the product name does not establish one preparation method for every mineral substrate. Compare concrete, transition and interior primers by their intended function and finish compatibility.
Technical framework: from substrate to system
For architectural coatings, a sound specification starts with substrate condition, absorbency and moisture behaviour, rather than colour alone. New plaster, previously painted walls, concrete and repaired patches within one building may require different preparation. Dividing the survey into distinct substrate zones reduces the risk of applying one primer or one coverage assumption throughout the project. Record the intended use, existing coating, cleaning regime and desired appearance together.
A trial should be more than a small colour swatch. Prepare a representative area using the proposed preparation, primer and finish. Assess it after drying in daylight and artificial lighting, looking for patch boundaries, roller texture and sheen variation. An approved sample becomes a practical reference for different teams working on the same project. Coating selection does not replace correction of water ingress, moving cracks or other defects in the building fabric.
Start this assessment with the Architectural Coatings range and refer to the coatings glossary for terminology.
Example project scenario
After electrical work, an office wall may combine old paint with new plaster strips. Remove weak edges, restore the plane and clean the surface before defining how to prime areas with different absorbency. The finish trial must cross a repair boundary; a trial confined to sound old paint cannot establish that repairs will remain invisible.
Checks before making the decision
- Unsound surface: remove weak material before filling.
- Level differences: inspect under grazing light and define the repair area.
- Dust: remove it appropriately after sanding.
- Mixed substrates: include every substrate type in the trial.
Relevant products and system components
These records support comparison and technical discussion. Listing them together does not constitute an approved application system for every condition. Follow the links for packaging, technical scope and product-specific questions.
Nanomix Interior Wall Filler
Interior Wall Filler is a surface-levelling product developed to correct imperfections before painting and provide a more uniform foundation for the topcoat.
Application scope: Filling and levelling interior concrete, aerated concrete, cement-bonded particleboard, brick, OSB, MDF, previously painted and plastered surfaces.
Nanomix Interior Wall Primer
Interior Wall Primer is a professional primer that promotes more uniform topcoat adhesion and provides a controlled foundation for the coating system.
Application scope: New or previously painted mineral building surfaces and absorbent substrates specified for the product.
Nanomix Exposed Concrete Primer
Exposed Concrete Primer is a professional primer that promotes more uniform topcoat adhesion and provides a controlled foundation for the coating system.
Application scope: New or previously painted mineral building surfaces and absorbent substrates specified for the product.
Archived family reference; product-specific confirmation required (PDF)
Nanomix Transition Primer
Transition Primer is a professional primer that promotes more uniform topcoat adhesion and provides a controlled foundation for the coating system.
Application scope: New or previously painted mineral building surfaces and absorbent substrates specified for the product.
Application, acceptance and maintenance planning
Agree acceptance criteria before work starts: colour reference, texture, visibility of repairs and the expected cleaning regime. Link container and batch information to room or elevation records. Attempting to save material through excessive dilution or inadequate preparation can create additional coats and labour later. Calculate net area, substrate absorbency, specified coat count and practical application losses separately.
Record ambient and substrate conditions during application; air temperature alone is insufficient. Take recoating and return-to-service requirements from the selected product's current technical data sheet. Use the safety data sheet to define ventilation, personal protection and handling arrangements.
Preparing a technical enquiry and quotation request
Before contacting the technical team, prepare overall and close-up photographs. Identify substrate, any previous product, area or component count, colour and appearance requirements. State the application location, equipment and required completion date. Flag chemical contact, continuous immersion, food-related use or any other condition requiring specific documentation at the beginning of the enquiry.
Request separate identification of primers, finishes and auxiliaries alongside exact product codes. List unresolved technical values as items requiring written confirmation instead of filling them with assumptions. Keeping the approved sample, current technical data sheet and application records together allows purchasing and production to work from the same decision. Packaging information supports ordering, but product-page options do not represent live stock or a guaranteed delivery date.
Send your project details through the quotation request form or discuss unresolved questions with the Versan Boya team.
Frequently asked questions
Does primer guarantee a fixed finish coat count?
No. Substrate colour, absorbency, finish colour and specified application all contribute. Primer selection should not be reduced to eliminating one finish coat; system performance and a uniform substrate come first.
Can interior filler be used outside?
Do not use it outside unless exterior suitability is explicitly stated. Moisture, rain and temperature exposure change the requirements. Check an appropriate exterior filler and its compatibility with the coating above it.
Sources and technical scope
This article is based on Versan Boya product records, the site's technical descriptions and available archived Nanomix catalogue documents. An archived document does not replace a current technical data sheet. Confirm numerical application values, system compatibility and special-use approvals for the selected product before ordering. The scenario is illustrative and is not presented as a completed customer project or a performance test.
Editorial archive date: 15 July 2026. This new content was prepared and updated on 25 September 2026. Archive ordering does not imply that the article was previously published.
Explore the subject further
- Choosing Interior Paint: Washability, Sheen and Room Use
- Exterior Paint: Selecting a System for Moisture, Climate and Substrate
- Decorative Wall Finishes: Sampling and Planning Marmo and Travertine Effects
- Building Paint Maintenance: Quantities, Coverage and Refurbishment Scheduling
Related technical publication: 2026 environmental paint criteria define performance and sustainability together.