Quality Policy

PKO do Brasil

Looking to the future motivates us to continually improve quality management system to satisfy stakeholders, as we seek to work with responsibility, safety and quality, meeting the applicable requirements, adding technology to our processes with focus on the increase in our customers’ satisfaction and on the soundness of our business.

To further improve our customer relationship, PKO makes available a session with guidelines on glass cleaning care, thus ensuring product quality policy.

Customer Support

[email protected]
+55 11 4699-8999 / +55 11 4791-8999


Tempered Glass
Manual Download (PDF)

Goes through a special treatment, ensuring that, in the event of breakage, it will shatter into small particles with less sharp edges than that of standard glass, thus, with reduced risk of accidents. Such treatment provides the glass with greater mechanical and thermal strength. Because of its characteristics, after such treatment, it cannot be cut or drilled anymore

ABNT NBR 14698

General Recomendations


  • Do not use products that may scratch the glass, such as: rough sandpaper, steel wool, the rough side of kitchen sponge, (the so-called abrasive products);
  • Do not remove tags with knives or sharp objects. Soak them with water and scratch them with a plastic spatula;
  • Keep the product clean and dry by cleaning it periodically;
  • Use only water and neutral soap.


  • Avoid hitting the glass with hard or heavy objects or otherwise causing shocks in opening and closing glass doors;
  • Do not allow unaccompanied children to play with glass, especially if it is loose or waiting for installation;
  • If you detect any malfunction or flaws in the glass prior to installation (cracks or splinters), please, contact immediately your distributor or our customer support.


  • Correct handling, installation and usage of the glass is a responsibility of the customer.
Laminated Glass
Manual Download (PDF)

Check out the main tips for laminated glass maintenance.

Composed of two or more sheets of glass held in place by means of heat and pressure through one or more interlayers of polyvinyl butyral (PVB). In the event of breakage, this glass ensures that the splinters remain together, stuck to the PVB. In addition to resisting to higher levels of impact, laminated glass provides great acoustic comfort and, depending on its composition, major thermal comfort with high energy savings.

General Recomendations


  • Laminated glass pane must be stored at a dry and ventilated area and, especially, over racks with resistant base and rubber pads;
  • Avoid storing glass sheets over hard surfaces, such as directly on the floor, wood or rack without rubber pads, because they will cause the glass to crack;
  • Keep paper wrap or plastic separator used in the transport to avoid any stains or to prevent them from sticking to each other.

Cutting and Lapping

  • The identification tag is always placed on the outside of the construction;
  • When cutting glass (whether manually or with a machine) make sure you always use new tools, so as to avoid damaging the piece. New tools allow for excellent cutting, and allows for a product without burrs and defects;
  • When cutting PVB, use only and exclusively a cutting blade, such as a stiletto;
  • PVB cutting with corrosive products such as alcohol degrades the product, causing future delamination;
  • Laminated glass loses its warranty if the PVB is cut with alcohol or any with other corrosive product.


  • Never use products that may cause scratches and cuts on glass surfaces.
  • Oil, grease and abrasive products such as cement, concrete and plaster may cause the glass to become opaque, therefore, they must be removed with isopropyl alcohol or acetone. Afterwards, wash with water.
  • For ideal cleaning, use soft cloth, warm water and neutral soap.
Manual Download (PDF)

Mirrors are made with large standard flat glass sheets. A machine makes the moves by placing the glass sheet on the conveyor. That is where mirror manufacture starts. The glass is washed only with water to remove residues; in other machines there are dozens of round brushes and sponges. The process uses only demineralized water, which means free of mineral salts, avoiding the accumulation of impurities and friction with the glass.

Then it is time to apply a layer of metallic silver, obtained from chemical reactions of silver nitrate. The process is controlled by computer. The paint is a protection against corrosion. As a warranty, the glass is then given a second coat of paint. The color does not matter, this decision is incumbent upon the manufacturer.

General Recommendations

Mirror cleaning and maintenance in the final environment

We must emphasize that both maintenance and cleaning of mirrors must not be made the same way as that of standard, tempered or laminated glass. Here are some basic care tips:

  • Never use acid or alkaline products to clean mirrors. These products may affect the surface, the edges and even the mirror’s protective coating. Products containing ammonia, present in most cleaning products, are extremely harmful to the mirror;
  • Do not use abrasive products (such as sandpaper or sapolium) or abrasive sponges on any surface of the mirror;
  • Start cleaning the mirror with a feather duster to remove the dust accumulated on its surface;
  • Clean the mirror with clean soft cloth, dampened with warm water. This is the simplest and safest procedure. Make sure you always dry the edges of the mirror;
  • A clean soft cloth dampened in alcohol may also be used, and afterwards, use a clean dry soft cloth to subsequently remove any stains left in the process. Make sure you always apply the product on the cloth and the cloth on the mirror; never spray the liquid directly on the mirror;
  • If the mirror is installed in bathrooms, as you wash the walls, never throw water or chemical cleaning products that can run down behind the mirror or even on its edges;
  • In the event of juxtaposed mirror edges, make sure no cleaning product residue remains encrusted between them. To completely dry the interspace between the edges, use air jet from a fan or from a hairdryer without heat;
  • A ventilated environment inhibits moisture condensation, which may be corrosive and harmful to mirror conservation. Especially in bathrooms, saunas, heated swimming pools and other environments where natural exhaustion of water steams and ammonia is not possible in a natural basis, the installation of exhaust fans is recommended.