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weber primer 401

weber primer 401
weber primer 401

Product benefits

  • Excellent bonding agent
  • Application on various surfaces
  • High durability
  • Easy application



weber primer401 is a high performace acrylic based waterproofing primer with excellent bonding agent properties with substrates. 

Product Description and Features

Product Description

weber primer 401 is a high performance acrylic based waterproofing primer with excellent bonding agent properties with the substrate. The substarte can be gypsum board, cementatious board, new and old concrete. It yields into overall strength properties of water proofing coating system.

Key Features

  • Increase adhesion between substrate and waterproofing material
  • Provide high durability of waterproofing coating even in continuous contact with water
  • Easily bush applied
  • Non toxic


  • weber primer 401 is to be applied in smooth surface like cast concrete, glazed surfaces, moisture resistant grade plaster board and fiber cement board prior to application of weber watergaurd
  • After weber primer 401 is applied allow it to dry before further treatment
  • It can be used for both internal and external applications

Technical Parameters

AppearanceMilky white pourable liquid
% total solids47 +/-1%
pH at 25ºC9.5 +/- 0.5
Mixing Ratio1 part liquid, 1 part powder
Brookield Viscosity SP 1.12 r.p.m. at 25ºC100 max


Send or download the documentation

You can either send the documentation to en-email address, or download it.

Preparation and Application

Direction For Use

  • The surface for bonding treatment must be thoroughly cleaned of all laitance, loose material, oil, greases etc.
  • Pre wet the surface with water adequately to saturate surface dry condition. Ensure that there is no standing water
  • After saturating the surface apply 1-2 coat of weber primer 401 with brush mixed with water in 1.1 ratio
  • Allow weber primer 401 to dry for 30-60 mins depending upon weather conditions

Shelf Life

1 year from the date of manufacturing, for unopened cans, stored in dry condition.


20 L


10-12 sqm per coat. Consumption may vary depending on surface conditions.


Milky White