Special Finishes

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Shieldtex Concrete Block Sealer

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A thick Acrylic Membraine to give total waterproofing to concrete blocks, concrete walls and fibre cement sheeting that has joints filled.


Commercial and residential, low and igh rise building - interior or exterior, wherever an attractive total sealing coat is to be specified.


A high build pure acrylic containing top grade pigments and inert fibre reinforcing that ensures maximum void filling and bridging of gaps, even up to 1mm wide.  dries with a semi gloss finish and some surface texture - depending on method of application.  offers outstanding durability and adhesion with very good abrasion resistance.  Available in white, can be tinted to a wide range of colours from the BS 5252 range.


Brush, roller or spray.  if spraying, allowance should be made for the coarse fibre reinforcing, i.e. use large tips and in the case of airless spray, a coarse not fine inline filter should be used.

Touch Dry 1 hour at 18'C
Recoat Minimum of 3 hours


Do not thin.

Clean up:



First Coat 5m2 per litre

Second & Subsequent Coats

7 1/2 m2 per litre

(Giving a filbuild of 90 microns per coat)


Concrete Blocks:

two coats may be sufficient, but to ensure a total waterproof film, 3 coats are recommended.  The first coat at least on concrete blocks, should be brushed or rolled to ensure adequate penetration of the sealer into minor cracks and voids.

New Concrete & New Fibre Cement Sheeting:

Clean down thoroughly to remove any dirt or other contamination, ensure particularly that surface is free from oil or release agents.  Fill large cracks in concrete with Flexicure Jointing Compound (refer to Flexicure Data Sheet for Cement Sheeting joints).  Apply 2 coats of Concrete Block Sealer, as per application details.

Old Cementations Surfaces:

Remove any loosely adhered existed coating and treat with Special finishes Chemical Clean to eradicate any mould infestation.  high pressure waterblasting is recommended, but if not possible, surface should be thoroughly wire brushed.  Old fibre cement sheeting may need joins resaled with Flexicure.  allow to dry thorougly applying 2 coats of Shildtex concrete block Sealer.

Technical Service:

Free advice is available from Special finishes ltd or your licensed Applicator who will be pleased to quote to apply shieldtex Concrete block Sealer to the correct specification.


Warranty / Liability

Special Finishes (NZ) Ltd provides all the enclosed information in good faith but without warrantee and is to assist your application. However the use of this product being used is beyond their control. The manufacturers can accept no responsibility whatsoever for any damage or failure arising from its application or use. It is totally the responsibility of the user to insure that the product is suitable for its intended use.