Mapei Planiseal 88 - Formerly Idrosilex Pronto

Non Hazardous
Osmotic cementitious mortar suitable for contact with drinking water, for waterproofing masonry and concrete structures.
Available in 25 kg bags and pallets of 50pcs
From £69.28 £57.73
In stock
Product Description

Mapei Planiseal 88 a ready-to-use heavy-duty, osmotic, waterproofing cementitious mortar for waterproofing masonry and concrete structures for contact with drinking water.

Best Uses

Mapei Planiseal 88 is ideal for the waterproofing of foundations, walls, cellars, basements, lift-rooms, swimming-pools, canals and reservoirs. Mapei Planiseal 88 is suitable for repairing underground masonries subject to water and moisture seepage in situations with negative pressure up to 1 atmosphere. Also suitable for waterproofing basins, reservoirs, concrete or masonry tanks containing drinking water, and for waterproofing concrete or masonry tanks containing sewerage water.

Ideal For:

  • Waterproofing
  • Drinking water reservoirs
  • Interior and exterior cellar walls
  • Damp areas
  • Swimming pools
  • lift-rooms
  • Underground passages
  • Foundation walls
  • Irrigation canals


Mapei Planiseal 88 is a pre-blended powder, composed of a cement-based compound, selected graded aggregates and special synthetic resins according to a formula developed in the MAPEI research laboratories. When mixed with water, Mapei Planiseal 88 becomes a fluid mortar that can be applied by trowel, brush or by spray with excellent adhesion to the substrate for complete waterproofing, even in the presence of slight negative pressure.

Mapei Planiseal 88 can be applied with a brush, trowel or spray. For application by brush or spray, apply 2-3 coats to the perfectly cleaned and solid substrate which must be thoroughly soaked with water beforehand. When applying by trowel reduce the mixing water to 5-6 litres for each bag.

Technical Details


  • London Underground Approved Products Register (APR) ID 2856


  • Suitable for contact with drinking water
  • Mapei Planiseal 88 has a consumption of 1.5 kg per mm of thickness
  • Can be applied with a brush, trowel or spray
  • Available in Grey
  • Available in 25 kg bags and pallets of 50pcs

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.