Bostik Simson® Prep P – Clear 500ml


Bostik Simson Prep P is a liquid pretreatment for improving the adhesion of several Simson products on porous substrates.

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Availability: 12 in stock SKU: 30023300/ASP/BOS001 Categories: ,



  • Pretreatment of mineral substrates, such as brickwork, concrete and lightweight concrete.
  • Pretreatment of wooden substrates (such as seams in teakwood ship decks).


Method of use
Substrates should be clean, firm, dry and free of dust and grease. Substrates can be cleaned with Simson Cleaner E. Keep the packaging well closed until the moment of use. Do not use Prep P direct from the original packaging. Pour as much Prep P into a clean glass or tin as can be used within 30 minutes and immediately close the original tin firmly. Always use a clean brush for the application of Prep P. Apply Prep P to the adhesion surface only in such a way, that Prep P forms a continuous coat or film. Prep P should be applied in a thin coat. Do not apply Prep P on already dried product. The application temperature can vary from +5°C till +30°C. The minimum drying time of Prep P is 60 minutes. Best results are obtained when the bonding/sealing is realised within 6 hours after applying Prep P. Therefore do not apply more Prep P than can be sealed within 6 hours. Avoid contact with the cleaned and pretreated surfaces because greasy fingers can cause bad adhesion. Also, condensation can negatively influence the adhesion. It is not recommended to use Prep P and to seal the joints during very high air humidity, for example during fog.


The coverage depends on the type of substrate and will be between 8 – 10 m2 per liter.


Storage stability
Prep P can be stored for 12 months in an original, unopened container in a dry place at temperatures between +5°C and +30°C.

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Dry contents 50%
Specific gravity 1.06 g/ml
Flashpoint +21°C
Drying time > 60 minutes
Colour light yellow/transparant
Packaging 500 ml tin