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T4793 SILICONE REMOVER / FOR PROFESSIONAL USE ONLY
Description:
T-4793 is a very good general purpose cleaner. It is suitable for cleaning and degreasing bare metal, existing
finishes, primer surfacers, etc. It is the least aggressive of the Sikkens solvent-based cleaners. T-4793 is not recommended on plastic or fiberglass body parts. In these cases.
Before cleaning with a surface cleaner:
When a repair is to be made or a finish is to be recoated, the first thing to do is to wash the car or surface of the
body panel under treatment. For optimal cleaning and removal of all water-soluble contaminants. i.e., bird
droppings, flies, tree sap, etc. wash down the vehicle with warm water and pH neutral detergent.
Contamination of residual grease, oil, wax and silicones will not be removed.
Cleaning technique :
After washing the car or the surface of the body panel under treatment, wet a clean cloth with the selected
surface cleaner and clean / degrease the surface under treatment. Immediately thereafter, wipe the surface
thoroughly dry with high quality absorbent degreasing cloths.
Always use two cloths, as one cloth will merely shift rather than remove dirt and grease.
Do not allow the surface cleaner to evaporate there the contamination on the surface will remain.
Wipe the surface thoroughly dry before the degreaser evaporates.
The purpose of surface cleaning is to remove residual grease, oil, wax, silicones, sand, etc. If this is omitted,
residual dirt will be stuck in scratch marks during sanding. Adhesion of the paint system subsequently applied to
the contaminated surface will be poor and could delaminate.
Replace cloths being used for degreasing and cleaning regularly by clean ones. Always place used degreasing
rags in a sealed container that meets local requirements to avoid the risk of a spontaneous combustion fire.
Instead of placing used (wet) degreasing rags in a sealed container place them on the floor grating so that the
solvents can evaporate, then place the dried cloths in the regular dustbin.
Point of attention on surface cleaning / degreasing: Salt residue and blistering:
With all cleaning and degreasing activities: once the surface under treatment has been cleaned, it must never be
touched with the bare hand; as salts, moisture and oils can be transferred to the prepared surface which may
result in delamination or blistering problems. It is particularly important that hand protecting barrier creams are
never used near an automobile that is to be refinished.
Should you still have touched a sanded and cleaned surface with bare hands; degrease it again with first one of
the solvent borne- and next with one of the water borne degreasers again according the recommended cleaning
technique.
Truck body constructions:
It is important to prevent dirt residues from getting into construction joints of vans, lorries, etc. during cleaning
and degreasing. They might cause adhesion problems when the paint is applied. Vertically fitted parts should,
therefore, first be cleaned and degreased from the bottom upwards and subsequently from the top downwards .
Degreasing and condensation on metal surfaces:
After a surface has been cleaned and degreased, solvent will evaporate. Heat needed for evaporation is
withdrawn from that surface, making it colder than the surrounding atmosphere, which results in (often not
visible) condensation on the surface. Allow the moisture sufficient time to evaporate.
The first coat of paint can be applied as soon as the surface has re-gained the temperature of the surrounding
atmosphere. Earlier application of the coat may lead to adhesion problems.
The same problem may arise if a vehicle is transferred from a cold room to a warm one or from outdoors to
indoors. Allow vehicles a minimum of one hour to acclimatize. Double-walled vehicles (and certainly insulated
ones) require some hours to acclimatize
| GEARGUS Car Refinishes recommends to provide adequate ventilation during cleaning and degreasing with any of the mentioned cleaners and degreaser. Where reasonably practicable, this should be achieved by the use of local exhaust ventilation and good general extraction. If these are not sufficient to maintain concentrations of particulates and solvent vapours below the OEL, suitable respiratory protection must be worn. Besides respiratory protection, always wear solvent resistant gloves while cleaning or degreasing even tough working with a low solvent degreaser. This will reduce the risk of cleaning solvents being absorbed into the skin and prevent salts and oils on your hands from contaminating the
surface to be refinished. |
VOC: The VOC content of this product in ready to use form is max. 755 g/liter.
Product storage :Product shelf-life is determined when products are stored unopened at 20°C.
Avoid too much temperature fluctuation
