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Oxicem® Negro 5 L is a chemical oxidizing reactant for stamped concrete, microcement, and decorative cementitious surfaces, belonging to the Oxicem® Concrete line. Its black semi-transparent finish generates mineral nanocrystals that provide a vintage effect and deepen the natural texture of the substrate. This tinting is light-stable and allows for the elegant and characterful renovation of high-traffic or worn areas, ideal for floors, facades, and decorative walls both indoors and outdoors.
- Prepare the surface: clean, dry, and stripped if it has varnish or paint.
- Protect adjacent sensitive elements such as wood, metal, or glass.
- Apply a uniform layer of Oxicem® Negro with a brush, roller, or spray.
- Wait 8 to 12 hours before applying a second coat if a more intense shade is desired.
- After each coat, neutralize and clean with water and baking soda or ammonia.
- Apply a water repellent sealer or varnish from the Topsealer® or Sealcem® family to fix the finish.
Performance
Yields approximately 10 m² per liter, depending on the porosity and texture of the substrate
Technical specifications
- Presentation: 5 L of reactant
- pH: between 2 and 8
- Density: 1.10 ± 0.1 g/cm³
- Dynamic viscosity: 15 ± 10 mPa·s (at 250 rpm)
- Touch dry (23 °C): 1–2 h
- Solubility: water soluble
Storage conditions
Keep in a cool, dry place, in a closed container. Protect from frost and extreme heat. Shake before use
- Microcement manufacturers
- 17+ years of experience
- ISO 9001
- ISO 14001
Payment methods
100% secure, encrypted payment with any of the methods shown above.
Delivery times
| Spain | 3-5 working days |
|---|---|
| Europe | 5-10 working days |
| Rest of the world | 10-20 working days |
Orders placed before 11:00 (Spanish time) ship the same working day.
Approximate times; they may vary depending on the destination.
Shipping costs
Calculated automatically at checkout based on the destination and the weight of the order.
See shipping policy →
14 calendar days
to return from the day you receive your order
Unused product
and in perfect condition
Return shipping costs
paid by the customer, unless the product is defective or incorrect
How to return a product
- Fill in our returns and incidents form.
- Give your order number and the reason for the return.
- Send the product back unused and in perfect condition.
Frequently asked questions about Oxicem
What is Oxicem® and what effect does it achieve?
It is a water-based chemical colouring reagent that reacts with the cementitious substrate and forms coloured mineral nanocrystals. The result is a semi-transparent, irregular glaze with an aged or vintage look that respects the original texture.
What surfaces can I apply Oxicem® on?
On cementitious and mineral substrates such as microcement, printed concrete, polished concrete, precast concrete and mortars, on both floors and walls.
Can it be used outdoors?
Yes. The mineral crystals it generates are light-stable, so it works for indoors and outdoors, from hotel or shopping centre floors to park paving and pedestrian areas.
How do I need to prepare the substrate?
It must be dry, clean and free of dust, grease, or previous varnishes, waxes or paints; if present, remove them by sanding or stripping. Protect areas that will not be treated beforehand, especially metal, glass, wood or lacquered surfaces.
How is Oxicem® applied?
Apply it by brush, roller or spray without leaving excess. One coat is normally enough, although you can apply two for more intensity, leaving 8-12 h between them. Then clean with water and neutralise with baking soda or ammonia until no residue remains.
Does the finish need to be sealed?
Yes, it is recommended. A water repellent protects against water and dirt if you want a natural open-pore finish, and for permanent protection you can use varnishes from the Topsealer® range, Sealcem® WT or Sealcem® DSV.
Which sizes is Oxicem® Black sold in?
In 1 L · 5 L · 25 L, from €15,45.
Where can I find the technical data sheet for Oxicem® Black?
You can download the technical data sheet (PDF) with all the application details.
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