Sika® Primer-207

• The maximum open time is depending on many environmental factors
• High temperatures will shorten the time and dirt and dust will have a negative influence, therefore we recommend in Automotive Glass Replacement applications to clean and repeat the chemical treatment after 2h.

• New paints are difficult to bond as they are developed to be self-cleaning and repellent
• Allow the paint to properly cure first (24h)
• Use abrasive pad to scuff the surface, Sika®Cleaner G+P to clean and apply Sika®Primer-207

• If the old PU is still in place the standard procedure can be followed
• If you bond directly to FRP use abrasive pad to scuff the surface, Sika®Cleaner G+P to and apply Sika®Primer-207

• To ensure a durable bond, transparent windshields must be surface-protected against UV. Sika® UV Shielding Tape or trims can be used in cases where no protection is given. Sika Primer (and most glass primers from other manufacturers) are organic materials and will be destroyed by UV radiation within a very short time and therefor provide no durable protection.
  

Possible solutions are:

• Suitable print color.
• Protective metal or opaque plastic trim
• .Sika® UV Shielding Tape.

• Sika® Aktivator PRO and Sika® Primer-207 contain reactive components which react chemically with glass, paint and other materials. Once cured, they can only be removed mechanically and the upper layer of the substrate is damaged in the process. Care must be taken to apply Sika® Aktivator PRO only to the required areas. If the product is applied to the transparent area of the glass, it will be visible and the customer will have cause for complaint.

• Sika® Primer-207 can be cleaned using Sika® Remover-208 or Sika® Handwipes tissues as long as it has not cured completely. Once cured, it must be removed mechanically.

• Applying a thick layer of Sika® Primer-207 results in a longer flash-off time. But if applied as corrosion protection on bare metal it is recommended that two thick layers of Sika® Primer-207 be applied for long lasting protection

• If the viscosity of the primer gets high, NEVER use thinners or solvents to dilute the product as the higher viscosity is an indication of lower reactivity.

• Shaking primers mixes the solids that may have settled at the bottom of the bottle and ensures a thin, uniform mixture and coverage. All manufacturer’s primers containing solids should be shaken before use.