• Imagen con los envases que encontrarás en el kit de microcemento Smartcret para chimeneas de obra de 18 m².
  • Chimenea de obra revestida con microcemento color Blanco Roto con abertura arqueada; fuego encendido y gran ventanal a la izquierda.
  • Chimenea de obra con microcemento color Coral con arco profundo; fuego encendido, suelo en espiga y sombras del ventanal.
  • Chimenea de obra en microcemento color India con formas suaves en salón luminoso con ventanal arqueado, mesa de piedra y sofás neutros.
  • Chimenea de obra en microcemento color Khaki, estanterías integradas y luz dorada del atardecer entrando por el ventanal.
  • Smart Liso
  • Smart Varnish 2L
  • Disco de Lija
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Microcement kit for 18m² cement or concrete fireplace

Microcement kit for 18m² cement or concrete fireplace

From the “same-old” to a seamless, irresistible surface with our 18 m² microcement kit for inbuilt fireplace.
Ready-to-use so you can apply it over cement, concrete, drywall, or plaster—no drama.

Expect a silky touch, easy upkeep, and a finish that handles ambient heat. Choose from 20 colors and 2 finishes. Pick yours and nail your first DIY makeover.
€436,86 EUR
€436,86 EUR
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Colour: Spike
Finish

* Our delivery times to the UK are two weeks (15 days) from the time the order is paid for. This period may vary depending on the customs clearance process. A process outside Smartcret's control. Our delivery times to the US are two weeks (15 days) from the time the order is paid for. (Air shipment to the US)

* The colours shown and their NCS equivalents are indicative and have no contractual value. Please note that the calibration of your monitor may influence the colour perception, so there is a chance that it may not match after applying the product. The lighting in the space the application method and the type of tools used may also affect the final result.

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Step-by-Step Guide

Description

What’s in the 18 m² microcement kit for a cement or concrete fireplace

Designed exclusively for exterior, visible areas. Delivers a seamless, modern, durable surface that tolerates normal ambient temperature changes.

Important: microcement is not fireproof—do not apply on areas in direct contact with flame.

  • 3 × Smart Primer ABS (2 × 1 L + 1 × 0.5 L). Primer that balances absorption and prepares the substrate for the microcement system on cement, concrete, drywall, or plaster.
  • 3 × Smart Liso (6 Kg). Ready-to-use, pre-pigmented finishing microcement. Allows very thin coats with a soft feel and a jointless look that handles ambient heat around the fireplace.
  • 2 × Smart Varnish (2 L). Polyurethane sealer in matt or satin. Seals and hardens, boosts color depth, and makes daily cleaning easier, helping the finish last longer.
  • 18 × 220-grit sheets. For levelling between Smart Liso coats and removing minor imperfections without scratching.
  • 9 × 400-grit sheets. For fine sanding between varnish coats to achieve a uniform, elegant touch.

👉 Tools not included. Trowel, roller, Smart Roller, tray, bucket, putty knife, etc. are not part of the pack. For consistent results, add the Tool Kit. Low-quality tools may leave marks.

Additional information

Considerations for the 18 m² microcement kit for your inbuilt fireplace

  • Exterior use only. Apply on visible outer areas only. The system is not fireproof—never inside the firebox or in direct flame.
  • Use the right tools. Choose the recommended Tool Kit; untested or low-quality tools can mark the surface and ruin the finish.
  • Level, firm base. If there are irregularities, level first with a suitable mortar. Microcement needs a solid, flat, dry substrate.
  • Clean junctions. Define edges and corners with a putty knife to avoid burrs.
  • Correct technique. Keep the trowel at ~45° to control material flow and prevent drag marks.
  • Cure before use. Wait 7 days before lighting the fireplace; the varnish reaches maximum performance then.
  • Cleaning & care. Water + pH-neutral soap; avoid harsh products. For extra care, use Smart Cleaner (deep clean) and Smart Wax (maintenance).

Properties

What microcement brings to your inbuilt fireplace

  • No-construction makeover, done by you. Ready-to-use material and clear steps: transform the fireplace yourself—no dust, no contractors.
  • Style on demand. A palette of 20 colors and 2 finishes (matt/satin) — from clean minimal to characterful rustic.
  • Thermal stability. The finish keeps its look through normal household temperature changes. Note: apply on the external cladding only, never where there’s direct flame.
  • Seamless visuals. Jointless, clean, elegant surface with an instant magazine-worthy effect.
  • Pleasant feel & everyday use. Soft-touch, uniform appearance that highlights the fireplace without overpowering the room.
  • Low maintenance. Water + pH-neutral soap once a week is enough. Extra care: Smart Cleaner (deep clean) and Smart Wax (maintenance).

Application

Quick guide to applying your 18 m² microcement kit for an inbuilt fireplace

You’re kicking off a project you’ll be proud of for a long time. Cover-worthy finish without an endless remodel? Done. This weekend, you set the pace: roller ready, music on, and an inbuilt fireplace about to take center stage. Less construction, more design. The secret isn’t speed—it’s respecting drying times and keeping layers thin. Air the room, gather tools, and follow the steps calmly: if you can paint a wall, you can do this.

Scope: coat exterior, visible areas only (front and surrounding zones). Before using the 18 m² microcement kit for an inbuilt fireplace, confirm substrate compatibility: cement, concrete, drywall, or plaster.

  1. Substrate ready? Your absorbent surface must be impeccable: no cracks or flaking, free of dust/grease. Repair, level, and clean before starting.
  2. Primer. Roll on one even coat with the orange roller. Wait 30 minutes before applying microcement.
  3. Smart Liso takes over. Apply three very thin coats of Smart Liso microcement (≤ 0.5 mm each). Smart Roller first, then trowel at a 45° angle. Let each coat dry 6 hours and hand-sand with 220 grit after the first.
  4. Correct varnishing. Apply three coats, leaving 4 hours between each. Hand-sand with 400 grit after the 1st and 2nd coats. Your inbuilt fireplace gets a uniquely silky touch.

Curing & first use

Wait 7 days before lighting the inbuilt fireplace—this is when the varnish reaches optimal hardness and resistance. From then on, enjoy a continuous, contemporary, easy-to-maintain surface that stays stable with ambient heat.

Important

  • Hand sanding only: an electric sander can burn the microcement due to excess pressure.
  • Keep the trowel at ~45° to avoid drag marks and maintain control.

View full process

Technical Sheets

Technical Data Sheets for the 18 m² microcement kit for inbuilt fireplace

Your inbuiltfireplace is ready to level up. For a professional result, here are the key specs of each product in the 18 m² microcement kit, designed for absorbent substrates such as cement, concrete, drywall, or plaster.

Specification sheet Smart Primer ABS

Specification sheet Smart Liso

Specification sheet Smart Varnish