HOW DOES CEMENT CURE.

A Portland cement plaster mix gains strength by means of chemical and physical interaction with water, aggregate and the substrate or surface that it is applied to.

The most important requirement in curing of cement plaster is the presence of sufficient water in the mortar or mix to hydrate the cement paste. Water acts as a catalyst for curing.

A chemical reaction commences when water and Portland cement are brought into contact with each other during initial stages of mixing either by mechanical mixer or manual mixing.

A series of new chemical reactions follow when compounds form which bind together the grains of sand or mortar within the mixture and the substrate or surface simultaneously. Water is the critical factor in this reaction as it actually combines with the cement and the substrate.

This reaction is designated hydration. If hydration is unable to take place, failure of the plaster mix will be evident. In the event that a surface is treated with PCT 56 prior to applying plaster, hydration can not take place due to the water repellent properties of PCT 56.

Therefore, and under no circumstances, can PCT 56 be applied to a surface or substrate as an intermediate treatment between two plaster surfaces or underlying brick substrate,

Rhinollite has over many years become a generic name. It is a lightweight retarded hemihydrite substance where 2 molecules of compound will mix with 1 molecule water. The product is composed of hydrous Calsium S ulfide, lime, natural filters, specialized chemicals and minute mica particles and available to the trade as a white/grey powder. All the ingredients are catalyzed when water is added to achieve a homogenous paste. Application of the product is specialized and some know how required to create a successful finish. The paste is applied to the cement plaster surface, left for approximately 30 minutes and milked with a wooden trowel to achieve a thin film which hardens to a speckled skin. The water content also acts as a conveyance to ensure that penetration into the cement substrate takes place. (to convey the product into the cement surface) If the cement substrate has been treated with PCT 56 prior to application, the water conveyance will be unable to penetrate into the surface resulting In adhesion failure and delamination of the Rhinolite. However, a surface treated with Rhinolite may be sucessfully treated with PCT 56 WATER REPELLENT TECHNOLOGY

Due to the inorganic nature and under normal conditions it will last forever.

All leading paint brands where tested. In all instances the life expectancy of the paint was extended dramatically. No paint failures where rcorded.

During treatment with PCT 56 the chemical enters the microscopic capillaries within the surface to form a solid bond. When paint is applied, it is unable to enter these microscopic capillaries. Less paint is therefore required. The surface profile of the surface is however not disturbed.

PCT 56 will also perform in submerged conditions. Due to the high alkalinity growth of algae or aquatic bacteria is prevented.

Maintenance of a Koy dam includes stability of water content and PH as well as addition of oxygen enhancers. This entire process requires some effort and is expensive. If maintenance is not conducted in accordance with recommendations, PCT will reduce the oxygen content which will be fatal to the fish. Recent failures occurred when it was found that no maintenance was conducted. IN VIEW OF THE RISK PCT 56 MAY NOT BE SPECIFIED FOR KOY DAMS OR ANY WATER FEATURE CONTAING FISH SPECIES.

The perfect shower has yet to be built!!!! Penetrating damp on tile areas are the main cause of paint failures on adjacent walls. Water or moisture penetrates the tile grout and the bottom corners at right angles to the floor. Imprtant: All areas to be treated must be dry and free from any moisture or body fats!. Leave for as long as it takes to dry. Spray the entire tile area liberally with PCT 56. Leave for 1 hour and remove excess chemical with a damp cloth. This will prevent white spotting on the surface. On adjacent walls, remove all loose and flaking paint and fill imperfections with a suitable filler.

Heat, moisture and food fats create the ideal atmosphere for incubation of bacteria and algae. Paint failures are evident!. Gypsom Rhinoboard or asbestos ceilings may be treated with PCT 56 to prevent paint failures.

 Mildew requires a lot of moisture, ideal temperatures and organic fat to grow. However, extensive growth is achieved only when it has a surface to hold on to. A surface treated with PCT 56 has the ability to restrict mildew growth by depriving a hold on to surface

Due to their composition paving bricks are extremely absorbent and act like a sponge when wetted. Internal capillaries are large and any oil and wastage or spillages are absorbed. Removal is impossible. Treatment with copious amounts of PCT 56 will deprive the bricks of any absorbing properties. Any oil spillage will lie on the surface and may be washed off with a domestic detergent.

No formal specification exist for manufacturing or quality procedures for prefabricated walls. Municipal by-laws clearly express that prefabricated walls are approved for identifying surrounding borders only and no differentiation are made with steel wire fencing. Slabs are reinforced with steel and mechanical breakdown occurs when water is absorbed and the steel becomes affected with rust or corrosion. In certain conditions entire slabs are destroyed. This entire process is aggravated by underlying damp coarse membrane. Prefabricated walls are often painted to add aesthetic value to property. Case histories have revealed that the life expectancy of prefabricated wall sections previously treated with PCT 56 and painted with a high quality paint increased 5 x.

Being of cementations nature and continually subjected to severe atmospheric conditions such as rain, hail and temperature variations the life expectancy of cement roof tiles are limited. Mechanical properties progressively reduce with ageing when water leach the lime from the cement and over prolonged periods the tiles become brittle when all mechanical properties are destroyed. Costly replacement becomes necessary. This occurs between 6 � 8 years. In January 2004 two tiles where submitted for accelerated �Weatherometer� tests by a leading laboratory who specialize in this field. One tile was treated with PCT 56. After 4 months, basically representative of 14 years actual practical exposure in accordance with SABS requirements, the tiles where removed. On removal from the test equipment the untreated tile shattered while the treated tile showed no signs of any mechanical failure other than a colour change from red oxide to light brown due to oxidation of inherent oxides. The life expectancy of cement roof tiles will improve dramatically when treated with �PCT� 

When domestic crackfillers and grouts are mixed with PCT 56 to achieve a paste they will obtain water repellent properties when curing has occurred. However, in some instances the viscosity of the paste increases dramatically and when water is added the viscosity is reduced to normal. Tests conducted with leading brand names indicated that the curing period is reduced and mechanical properties improved considerably.

Sandstone , in various precut forms, has been used extensively in the building industry for many years and has tremendous added value. Our country can boast some of the most excellent preserved historical sandstone buildings. However, in the natural state sandstone draws water like a sponge. Although this feature is not detrimental to the quality or life expectancy, sandstone buildings are always cold due to evaporation when the water molecules chill the air. Treatment with PCT 56 restricts absorption thus reducing the chilling effect.

SUBSTRATE COMPOSITION.

Asbestos sheeting and corrugated sections are composed of Portland cement, fine aggregate and asbestos fiber to improve mechanical properties and durability. During ageing and prolonged atmospheric exposure (wind, hail and rain) the lime is leached from the cement by water and moisture. The mechanical properties are reduced and the asbestos fiber exposed. Release of the asbestos dust fiber into the atmosphere is a severe health hazard when inhalation of the dust can lead to asbestosis in humans. Asbestosis is a chronic disease and is characterized pathologically by interstitial fibrosis and asbestos bodies. Recent laws restrict manufacture of asbestos products, however, many older buildings remain sheeted with asbestos sheeting.

TREATMENT.

Treatment with PCT 56 will prevent water or moisture penetration, prevent the leaching of the lime and reduce exposure of the asbestos fiber. Painting of the surface with a durable paint will extend the life of the sheets by additional 20 / 25 years.

BENEFITS.

• Ease of application.
• Low dirt retention.
• Inflammable.
• Durable.
• Fire retardant.
• Inexpensive.
• Readily available.
• Protection of assets.
• Adds value to assets.
• Will enhance the natural color and extend the life expectancy of grass.
• Not subject to rodent or termite attack. Contains no atmospheric pollutants.  

Yes it can be used, PCT has a MATT finished

You just fill up the plaster, let it get dry then u can apply PCT on the old and new plaster. After 24hrs you can paint over.

No you can apply PCT over a contractors PVA and then apply the final coat. You can strip the paint down to the cement and then apply PCT.

Yes it can be used, PCT has a MATT finished

You just fill up the plaster, let it get dry then u can apply PCT on the old and new plaster. After 24 h u can paint over

Yes it can be used, PCT has a MATT finished

Yes you can apply PCT 56 Water Repellent on the Polycell Mendall 90 after it has dry. Yes u can use PCT 56 Water Repellent to mix with polifilla, once the polifilla is dry it's automatically water repellent, it is not necessary to use PCT after the polifilla has dry.

Yes you can apply PCT 56 Water Repellent on the Polycell Mendall 90 after it has dry. Yes u can use PCT 56 Water Repellent to mix with polifilla, once the polifilla is dry it's automatically water repellent, it is not necessary to use PCT after the polifilla has dry.

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