LANKO® 761 Steel - Impregnation corrosion inhibitor for reinforced concrete
LANKO® 761 Steel: impregnation corrosion inhibitor for reinforced concrete
LANKO® 761 Steel is a liquid, organo-mineral, water-based corrosion inhibitor that is applied to the concrete surface and migrates to the reinforcement to form a protective layer on the steel. It provides a comprehensive corrosion treatment, both preventive and curative, without having to chip out the whole element, and fits principle 11 of standard EN 1504-9.
It is a colourless, odourless, non-flammable and non-toxic liquid, with a consumption of 0.6 to 0.8 l/m² spread over 3 or 4 coats of 200 g each. Since it does not form a water vapour barrier, the substrate keeps breathing and the appearance of the façade is not altered. Its performance is backed by DIT 636R/21 from the Instituto Eduardo Torroja (IETcc-CSIC).
✅ Main advantages
Preventive and curative: stops corrosion that has already started and protects the sound reinforcement in the rest of the element.
No demolition: applied by roller, brush or spraying onto the surface, without exposing the steel.
Water-based: non-toxic, non-flammable, solvent-free product with a pH of 8-9.
Breathable: does not form a water vapour barrier, so it does not cause blistering.
Invisible: colourless, odourless liquid that does not change the colour or texture of the concrete.
Ready to use: requires no dilution, mixing or prior priming.
Certified: DIT 636R/21 from the IETcc-CSIC and tests in independent accredited laboratories.
🏗️ Recommended applications
Rehabilitation of façades and reinforced concrete structures with reinforcement in the process of corroding.
Preventive protection of new or sound structures exposed to marine environments or chlorides.
Columns, beams, slabs, cantilevers and balconies with spalling caused by steel oxidation.
Complement to repairs with repair mortars: the whole element is treated, not just the patch.
Bridge decks, walls and car park structures exposed to de-icing salts.
Wastewater treatment plants, channels and structures in humid or aggressive environments.
📋 Technical specifications
Chemical base: water-based organo-mineral product
Appearance: colourless, odourless liquid
pH: 8-9
Density: 1 ± 0.10 g/cm³
Viscosity: 1.1 mPa·s at 20 °C
Flash point: non-flammable
Toxicity: non-toxic product
Consumption: 0.6 to 0.8 l/m²
Number of coats: 3 to 4 coats · 200 g per coat
Time between coats: no waiting time
Dilution: ready to use, do not dilute
Application temperature: +5 °C to +35 °C
Permeability: does not form a water vapour barrier
Shelf life: 12 months from the date of manufacture
Storage: cool (10-35 °C), dry place, protected from the weather
🧰 How to use
Prepare the concrete: remove any loose concrete, clean the exposed reinforcement and repair with repair mortar before the treatment.
Clean the surface to be treated (pressure water jet or brushing) until it is sound, cohesive and free of dust, grease and laitance.
Let the substrate dry and check that the ambient and substrate temperature is between +5 °C and +35 °C.
Apply the product undiluted by roller, brush or low-pressure spraying, in 3 or 4 coats of 200 g/m² each.
Apply successive coats with no waiting time between them, until the total consumption of 0.6-0.8 l/m² is reached.
Protect the surface from rain during the following hours so the product is not washed off before it penetrates.
Clean tools and equipment with water immediately after use.
🛡️ Standards and certificates
Compliant with standard EN 1504-9 (principles for the protection and repair of concrete structures).
DIT 636R/21, Technical Suitability Document from the Instituto Eduardo Torroja (IETcc-CSIC), valid until 21 July 2026.
Efficacy tests carried out in external, independent accredited laboratories.
📦 Supply formats
20-litre jerry can (store reference).
Sika's documentation also lists 4 kg containers and 215-litre drums.
Units per box or per pallet: not declared by the manufacturer.
💡 Professional tip: the most common mistake is applying LANKO® 761 Steel as if it were paint, in a single generous coat. The product works by impregnation: it needs 3 or 4 passes of 200 g/m² to reach the reinforcement, and in very dense concrete penetration is slower. Nor does it replace repair mortar: first the spalled area is prepared and repaired, and then the WHOLE element is treated, including the areas that still look sound, which are the ones that will corrode next due to the anode-cathode effect.
Technical data according to the Execution Procedure «Application of the LANKO 761 liquid corrosion inhibitor» from Sika España. Sika does not publish a separate Product Data Sheet for this reference on esp.sika.com.
Frequently asked questions
What is LANKO® 761 Steel used for?
It is a liquid, organo-mineral, water-based corrosion inhibitor that is applied to the concrete and migrates to the reinforcement to form a protective layer on the steel. It is used as a preventive and curative treatment, without chipping out the whole element.
How much product is needed and how is LANKO® 761 Steel applied?
Consumption is 0.6 to 0.8 l/m², spread over 3 or 4 coats of 200 g each. It is applied undiluted by roller, brush or spraying, with no waiting time between coats and between +5 °C and +35 °C.
Does LANKO® 761 Steel change the appearance of the concrete?
No. It is a colourless, odourless liquid that does not change the colour or texture, and since it does not form a water vapour barrier, the substrate keeps breathing. It is also non-flammable and non-toxic.
In what format is LANKO® 761 Steel sold?
In the store it is offered in a 20-litre jerry can. It keeps for 12 months from the date of manufacture, in a cool (10-35 °C), dry place, protected from the weather.
Frequently asked questions about Sika products (mortars, adhesives and sealants)
How do I know which size and quantity to buy?
Each product page includes the approximate yield or consumption (for example kg/m² or metres of bead per cartridge) in the "Technical specifications" section. Calculate the surface area or thickness of your project and multiply by that consumption to find out how many units you need. If in doubt, contact us with the measurements of your job.
Where can I find the complete technical data sheet (Product Data Sheet)?
The description of each product already includes the main technical data (strengths, setting times, application temperature, applicable standards, etc.), taken from the official Sika Spain Product Data Sheet. If you need the complete PDF data sheet or the safety data sheet (SDS), write to us and we will send it to you.
Do these products comply with European regulations (CE marking)?
Most Sika products carry the CE marking in accordance with the relevant European standard (for example EN 1504 for structural repair, EN 12004 for tile adhesives, EN 13888 for grouts or EN 15651 for sealants). The exact standard for each reference is detailed in the "Standards and certificates" section of its product page.
What protective equipment do I need to apply them?
It depends on the product: cement-based mortars and adhesives are usually irritating to skin and eyes (gloves, goggles and a mask are recommended), while polyurethane sealants and adhesives require good ventilation. Always check the safety section of the product page and its safety data sheet (SDS) before use.
How should I store these products and how long do they last unopened?
Shelf life and storage conditions (temperature, humidity, protection from light) vary depending on the type of product (cementitious, polyurethane, epoxy, etc.) and are stated on the packaging and in the data sheet of each reference. In general, it is advisable to store in a dry place, protected from frost and direct sunlight.
Can I return a Sika product if I haven't used it?
Yes, you have 14 calendar days from receipt to exercise your right of withdrawal, provided the product is in its original packaging and has not been opened. The cost of return shipping is borne by the customer. Contact us at info@vetonek.com or via WhatsApp on +34 629 571 735.
How long does my order take to arrive?
We ship to mainland Spain, the Balearic Islands, Portugal and the other European countries we serve (France, Belgium, the Netherlands, Germany, Italy, etc.). The estimated delivery time is 3 to 9 working days (no shipping to the Canary Islands, Ceuta or Melilla).
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