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Perma Plast-CN



Perma Plast CN is a corrosion inhibiting admixture for reinforced cement concrete which protects the reinforcing steel in the concrete from corrosion. Porous concrete allows ingress of water and moisture in the RCC structures, which starts corroding the reinforcing steel thereby reducing the life of concrete member and the structure itself. An addition of Perma Plast CN in the concrete at the recommended dosage during construction itself ensures corrosion free reinforcing steel with its long life.


Perma Plast CN is a liquid which easily mixes with water hence can be dosed along with water. Perma Plast CN is compatible with all types of cements and with other admixtures. It is a VOC free product and hence safe for the environment. It is free from chlorides and sulphates and is non hazardous It increases the life of the structure by protecting the steel. Perma Plast CN does not affect the plastic properties of the concrete.


When added to the concrete in the RCC structure the nitrite ions in the Perma Plast CN react with the ferrous oxide ions and form more stable ferric oxide layer around the steel which protects the steel from the chloride attacks, it also establishes a corrosion inhibiting concrete barrier around the reinforcement.


Perma Plast CN is used in all steel reinforced concrete, pre-stressed and post tensioned concrete. It is also used in concreting of areas such as floor slabs, parking areas , garages, bridge decks and marine structures. Use of this admixture in pre-cast elements such as manhole covers, grills, and drainage covers etc ensures corrosion free long life of these elements.


Form : Light straw colored liquid
Specific Gravity : 1.16 to 1.18 at 25⁰C
Solid Content : 30 %
Ph value : 8 ± 0.5
Chloride content : Nil



Perma Plast CN should be used at a dosage of 7.5 to 22.5 Litres per cubic meter of concrete as per the corrosion Inhibiting concrete mix specification documents and general practice. Perma Plast CN should be added to the mixing water for best results, Perma Plast CN should not be premixed with other admixtures. However other admixtures can be dosed separately after the addition of water with Perma Plast CN.


Perma Plast CN is available in 120 Kg & 250 Kg drums.


Perma Plast CN has a shelf life of 24 months in sealed drums as per standard storage specifications.


PERMA warrants that all products are free from any defects of manufacture and comply with the specifications given in their respective technical data sheet. No warranty can be given as to the results of use because conditions of use, such as site conditions, surface preparations, workmanship, weather, structural issues and other factors are beyond the control of PERMA. Purchaser agrees to seek the advice of qualified professionals to carry out tests & take trials to determine the suitability of products for their intended purpose prior to full scale usage of PERMA products and assumes all risks.

The company does not assume any liability for unsatisfactory results, arising from the use of our products. Purchaser’s sole liability is limited to replacement of product or refund of the purchase price paid if any product proven defective. No other warranties, express or implied, shall apply including any warranty of merchantability or fitness for a particular purpose.
PERMA shall not be liable for any consequential damages arising from the use of our products for unsatisfactory results.

The information supplied in this datasheet is based on our experience through extensive research and is given in good faith in order to help prospective users. We reserve the right to update the information provided in our technical data sheet at any time without prior notice within the scope of technical progress or new developments.

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