Intercrete® 4840


Specifically designed for the structural waterproofing and protection of concrete substrates where improved chemical and abrasion resistance is required. Intercrete 4840 can be reinforced with Intercrete 4872 tape to accommodate movement of cracks and joints. Intercrete 4840 offers low permeability to water at 10 bar positive and negative pressure along with excellent resistance to carbon dioxide gas and chloride ion diffusion. It can also be used as a one or two coat, direct-to-metal corrosion protection system for suitably prepared steel substrates.

Depending upon the condition of the substrate and any exposed steel reinforcement, additionalsurface preparation products from the Intercrete range may be required prior to the application ofIntercrete 4840.

All concrete floors, decks and highly porous substrates should be appropriately sealed using Intercrete 4850. Intercrete 4840 should always be applied directly to correctly prepared steel substrates. The following topcoats are recommended for Intercrete 4840:

  • Intercrete 4870.

General information

Uniclass 2015

Pr_35_31_77_15 Concrete sealersPrimary


C42/345 Protective coatings for concrete

Specification data - Concrete sealers

Product Reference

Intercrete® 4840

Product Options

Technical details:

  • Colour: Grey.
  • Gloss level: Matt.
  • Typical thickness: 2000 microns dry.
  • Density: 1850 kg/m³.

Mechanical characteristics:

- Compressive strength (to BS EN 4551 at 20°C):

  • 1 day: 5–10 MPa.
  • 7 days: 30–40 MPa.
  • 28 days: 50–60 MPa.

- Flexural strength (to BS EN 4551 at 20°C, 65% R.H):

  • 28 days: 11–14 MPa.

Adhesive strength:

  • Over concrete: >2 MPa.
  • Over steel: >3 MPa.

Similar products from International®, brand of AkzoNobel

Intercrete® 4820

Intercrete® 4820

Intercrete® 4841

Intercrete® 4841