Painting again, Not sure the surface? Use ChemStuk test kit.
Follow the instruction to see if you can recoat the surface again.
ChemStuk coating test kit is used to test a previously painted surface to determine an unknown coating to give an indication of what coating may be used to recoat the surface. ChemStuk coating test kit contains reactive diluent to react with the old coating and determine the type of the material.
The existing coating may become sticky or tacky and if coloured the colour may come off on your rag and then dry hard after 15 to 30 minutes. This normally indicates the existing coating is a Solvent Based Alkyd or Acrylic. Otherwise it can be Epoxy or Polyurethane if nothing stick to the rag , small test area of is recommended as a precaution to check suitability.
The existing coating may wrinkle and strip off the surface and this normally indicates the existing coating is an Enamel Paint and must be either removed or recoated with another coat of enamel coating.
The existing coating may react when the surface is rubbed with a rag and may clean off the surface and appear like chewing gum or look gritty and ball up. This normally indicates the existing coating is a water-based coating and can be recoated with another water based single pack coating or ChemStuk Polyurit will adhere to this coating however testing Polyurit on this coating is recommended as a precaution. The existing coating may not show any reaction at all and the surface may simply be cleaned by the solution. This normally indicates the existing coating is a two-pack coating and must be recoated with another two-pack coating.
How to do it!
Apply a small amount to the patch of the existing coating choose an clear area where the previous coating is in good condition around 5Cm. keep the coating wet with the solution applying more as required.
Allow about 5 minutes then rub the liquid into the surface and observe the reaction of the coating. Different test areas should be performed for best results.
When recoating make sure you follow the correct recoating preparation and product instructions.
Contact ChemStuk technical service for further information.
Caution
ChemStuk coating test kit is highly flammable and suitable safety precautions must be taken during handling and application.
Ensure adequate ventilation if applying in enclosed spaces. Avoid contact with naked flames, sparks, pilot lights and other sources of ignition.
Avoid contact with eyes and skin.
Refer to Acetone Material Safety Data Sheet for additional safety and user information
Important Note The information given on this data sheet is based on many years’ experience and is correct to the best of our knowledge. However since the use of our product, surface conditions, weather and a number of other factors are completely beyond our control, we can only be responsible for the quality of our product at the time of dispatch. For more information please contact our Company. As this information is of a general nature, we cannot assume any responsibility in individual cases.
