1.  Site Protection Before Application

The application of Spraytec by trained personnel is normally a very clean and simple operation; however it is very important to spend enough time before spraying to properly protect the surrounding Area from the hazard of over-spray.

Over-spray may occur if the applicator holds the lance in the wrong direction, or if the wind blows, Spots of membrane as it is sprayed from the lance. Therefore anything which should not be coated with. Spraytec should be shielded with plastic sheeting (or similar) before spraying. This sheeting can be. Affixed by adhesive tape, or sometimes clothes pegs are used as a quick and secure way of holding masking in position.

Masking is normally done in the morning immediately before application. Help an hour spent at the start of the job on masking is time well spent. This time will be more than made up due to the very quick application of Spraytec, (more than 1000 m2 per day).
There are different areas which need protection. All sensitive items on the application surface such as Sky lights, antennae, machinery, lighting, doorways, etc. should be masked. Secondly, the sides of the Building being sprayed, and any other walls and surfaces in the vicinity, which are vulnerable to wind. Driven over-spray should also be protected. If working on a roof, sheeting should be hung from the roof. To protect windows and other items on the building side. Thirdly, items on the ground or surrounding Area will also need to be covered. Typically an area of 30 meters surrounding the application site should be coned-off, restricting access to cars and people, although the appropriate area size will depend on wind conditions. All sensitive objects inside the area should be protected from possible Over-spray.

If Spraytec is applied in error into the wrong surface, then it can be washed away if water is immediately applied. It is recommended that a water hose is available during application to deal with this circumstance. If water is not immediately applied then Spraytec will adhere. It can then be removed with an industrial degreaser.

In situations where masking is not practical, the possibility of over-spray can be reduced if spraying is not carried out near the edge of the roof. A wide band of Spraytec’s sister product “Hitec”, can be brush applied around the roof edge, and the centre sprayed with Spraytec. Another idea to minimize the danger of over-spray is to spray around the edge of the building very early in the Morning or outside normal working hours, when there are few cars and people in the area, and then spray the centre of the roof later in the day.

2.  Personal Protection

Spraytec is water based and non-hazardous, and application should be clean and simple, however there Is always the chance that things could go wrong. Therefore we recommend that basic standards of good Industrial hygiene are flowed, and applicators are suitably protected with gloves, barrier cream, clear Glasses, and overalls, (daily disposable overalls are ideal).
Immediately after application sprayec can be washed off skin with dust water. If washing is delayed by a few minutes, remove by using a skin cleanser. And then wash off with soap and water. It is a good idea t use barrier cream on  hands and face prior to application. This prevents spraytec adhesion and allows removal by simple washing with water.

3.  When to spray

Like other spray applied materials spraytec is not nor may applied on windy days. Application should not be done whilst it is raining however it may be done immediately after the rain stops providing that standing water is brushed away (be careful on slippery slopping metal roofs)

Because Spraytec is water based it is damaged by frost therefore applied when the ambient temperature is above 40 c

4.  Checking the material

Before spraying it is recommended to test to discover if the spraytec is still in good condition and has not been damaged by frost or anything else. This is simply done by taking a few drops of spraytec emulsion and dropping it into some spraytec coagulant solution. The brown emulsion should immediately form a black solid which can be formed by hand into a single small ball. If the material does not turn solid or if it separates and becomes is of little brittle individual pieces which will not form single ball then the material is not suitable for use.

5. Coverage

The typical coverage rate for fu waterproofing is 70kg/m2 (producing a membrane with a dry film thickness (ft) of 4 mm)
This coverage can be reduced depending on the circumstances for example to seal porous fibrocement roof boards 5.5 kg/m2 can be used (a memorable with  a dft of 3 mm)if the substrate is smooth like metal then 4.k/ m2 is sufficient to give excellent long term waterproofing (a membrane with a dft of 2.25 mm)

Spraytec is supplied in three different grades (d15 d18 and d21) depending on the application. In some circumstances it is possible to reduce cost by selecting a mere inexpensive grade. For example on top of concrete rather than using less thickness a lower grade of spraytec would be preferable if the membrane is too thin sharp stone may cut trough it during application the membrane will cover any sharp stone uniformly without being cut penetrates or damaged but if someone walks on it after the membrane may be pushed down onto the stones with the result that the stone may be forced through the membrane. Therefore the membrane should be of sufficient thickness (4mm dft) on such surfaces.

6.  The presence of water during application

Spraytec provides instant water tight protection because it forms an instant waterproof membrane as soon as it is sprayed. This is because the spraytec emulsion is mixed in the air during spraying with spraytec coagulant. during spraying the water in separates from the solid part, and this process is known as breaking water is broken from spraytec as it comes into contact with the coagulant and the application surface. Most of this water lies immediately on top of the membrane; some of it is inside the membrane. Water on top membrane evaporates away quickly. The water which is inside or under, but in contact with the membrane will soon rise upwards and eave the membrane as the surface dries. In normal situations the water inside or under the membrane has no effect it should no a use blisters to form. When it leaves the structure within the membrane closes and the membrane becomes smooth.
However it is sometime possible to trap a larger quantity of water underneath the membrane during spraying. This water may already be present inside the substrate before spraying especially in old and leaking roofs or it may be standing water which has not been removed from the surface.

If water is trapped under the membrane it will not damage the membrane or affect its ability to waterproof the surface. However it will affect its adhesion in these areas and will create blisters. Unlike besters is traditional roofing felts and membranes besters in spraytec are not a problem and there is no reason for concern. Waking on a bistre will not damage the membrane which is strong and flexible.
Water trapped under the membrane it  change to vapor over time and this water vapor will slowly pass through the membrane and evaporate away usually within hours or a few days if there is a lot of water trapped then it may take all summer for all of it to escape. Eventually all the water will evaporate and the spraytec membrane will come into direct contact with the surface and will adhere to the substrate. According to British standards definition of membrane permeability spraytec is classed as a vapor barrier. However spaytec will allow some water vapor to pass through it so blisters eventually disappear. Training water under the membrane is not a common occurrence and is usually avoided by good practice. Water trapped in the substrate prior to application and also water broken from the spraytec which enters the substrate is not a problem  but can be avoided by printing sealing hoes etc. avoid spraying spratec onto standing water by brushing away pools of water from the surface before application. Also avoid applying spraytec onto the water which breaks during application. For this reason it is best begin application at the point on a sloping roof so that water runs away from which will be sprayed later

7.  Application

Application is usually conducted by a team of three men. One operating the machine one man holding the once and another supporting both the hoses and watching the applicator to make sure there are no accidents. it is important that the worker operating the machine should always be vigilant. He needs to regularly change Barres of sprayect emulsion 200kg barrels are emptied every 8to 10 minutes and to make sure that there is a spare barred of spraytec coagulant solution always on standby

Spraytec is applied by moving the lance form side to side over to side the surface. Usually the lace moved over the same spot 6 or 7 times before moving to a different area, although this will depend on both the speed the applied moves the lance, and the desired coverage rate.

Always begin application at the lowest point of the roof or any other substrate, and progressively move higher. At roof edges or similar edges of the application site, the motion of movement of the lance should be parallel to the roof. This helps to prevent over-spray and allows the applicator to keep the edge of the safely in view. On corrugated surfaces, the movement of spraying should always be at right angles across the line of corrugation. This allows the applicator view both sides of the corrugation as he moves the lance across the surface.

The nozzles at the end of the application lance should be kept parallel to the application surface. And held about 90 m from the surface. If spraying is done on vertical surfaces, such as parapet walls around the edge of a roof, it is important to remember to turn the lance so that the nozzles are parallel to the vertical surface.

8.  Walking on Spraytec

In general avoid walking on sparaytec for a few days until the surface has stabilized and lost tackiness. It is possible to walk on the surface immediately after spraying, whilst there is water still on top, because the water will protect the surface.

Once the water has dried but the surface is still tacky7, then walking should be avoided.9especialy in high temperatures) because of the danger that the membrane will stick to the soles of shoes. If walking n the surface at this time is necessary, then smooth soled shoes coated with silicon oil should be worn. Tread carefully and avoid repeated walking over a small area. Also avoid twisting the for of other heavy stress to the membrane during this time, it is best to eave the membrane a few days before walking on it.

Similarly, do not place anything on the surface whilst spraytec is still tacky, because it will become strongly adhered, and will be very difficult if not impossible, to remove. Be careful not to allow masking material to rest on top of tacky spraytec for this reason.

One of the advantages of spraytec is that it is self healing” this means that if the membrane is damaged by mechanical impact then to some extent it will naturally close and seal the damage thus preserving its waterproofing ability. Walking on the surface before it has lost its tackiness will damage its aesthetic appearance but should not damage the membrane if the advice above is flowed.

Sometimes if temperatures are very high then it is possible for a small amount of unbroken spraytec to become trapped by a skin of broken spraytec formed around it. Unbroken spraytec is brown where broken spraytec is black. If left alone then the un-cored material will break in the next few days as it comes into contact with coagulant in the surrounding membrane. However in the meantime if someone stands on this bubble of unbroken spraytec then the bubble may burst a d spray up. This should be avoided because it may contaminate footwear and clothing although walking on these bubbles will not damage the membrane.

9.  Missed areas

Although unusual sometimes small areas are missed by the applicator and are covered with spraytec if these gaps are very small then they may naturally close up and deal themselves because of spraytecs self healing properties. Larger gas can be covered with saytec sister product HITEC which does not requires ray equipment. The membrane can be touched up after a few days when it has lost its tackiness and lost its surface water

10.  Decorative over painting

Sraytec is a back uv resistant membrane capable of long protection .it does not require a topcoat however it may be over painted for decretive reasons. We are able to supply a special alcohol based paint called ST topcoat which is compatible with spraytec and is available in a range of different colours apply ST Topcoat when the Sprayutec has fully dried. To find out if the Spraytec is dry, press the surface with a thumb to see if any water appears.

11.  Equipment Cleaning

The machine is simple to clean, and if well looked after wil work perfectly for many years. During the spraying season clean by flushing the suction pipes and suction hoses with water until the water runs clear.Close all the valves. This has to be done everyday after sraying. At the end of spraying season the hoe system should be flushed with a mixture of soap and water and then rinsed through with clean water  do not use sot water as this will damage the metal parts in the machine and the hoses the out side of machine can be cleaned with cooking oil or degreaser and water. Always store the machine and hoses in the frost free environment.

12.  Waste Disposal

Spraytec is classified as non –hazardous and contains no harmful chemicals or additives. It requires no special method of waste disposal. Empty drum can be washed and refilled.