ES
FR
IT
PT
DE
CS
DA
NL
NO
FI
SV
Calculator
How much Oxicem do you need?
Consumption used: 0.1 L/m² per coat
You need approx.
We recommend
Total
Estimate including a 10% margin. Actual consumption depends on the substrate and application.
Oxicem® Negro 25 L is a water-based mineral oxidizing agent that chemically acts on cementitious surfaces to create a decorative black patina finish. Its aged, semi-transparent, and deep effect intensifies the texture of the substrate without completely covering it, generating an industrial and timeless look. It is designed for application on microcement, polished concrete, or mortars both indoors and outdoors. The treated surface can be protected with varnishes such as those from the Topsealer® range to increase its resistance and durability.
Application data
Recommended coats2
Consumption per coat0.1 L/m²
Time between coats
- Ensure the substrate is clean, dry, and free of waxes, varnishes, or sealers.
- Protect all nearby surfaces that should not be treated (metal, glass, wood).
- Shake the container well before use.
- Apply a uniform layer with the desired tool, avoiding accumulations.
- Allow to dry for 1 to 2 hours.
- If greater intensity is desired, apply a second coat once the previous one is dry.
- Wash with clean water and neutralize with baking soda or ammonia.
- Once completely dry, protect the surface with an appropriate varnish.
Coverage
Approximately 10 m²/L per coat, depending on the porosity of the substrate and the application method.
Technical specifications
- Appearance: liquid
- Color: semi-transparent black
- Density: 1.10 ± 0.1 g/cm³
- Dynamic viscosity: 15 ± 10 mPa·s
- pH: between 2 and 8
- Touch dry: 1–2 hours
- Recommended application: cementitious surfaces indoors or outdoors
Storage conditions
Store the product in its original, tightly closed container, in a dry, cool, and ventilated place, between 5 °C and 30 °C. Protect from frost and direct sunlight. Estimated shelf life: 12 months from the manufacturing date.
- 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.
What is the coverage of Oxicem® Black?
Approximately 0.1 L/m² per coat; 2 coats are recommended. Actual consumption depends on the substrate and application. Use the calculator above to work out how much you need.
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.
Recently viewed
Don't forget! The products you saw. Add them to your cart now.
People also bought
Here are some of our most similar products that people are buying.