Sika 1 Yellow Waterproofer - 5 Litres

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Est. Delivery: 2-3 Working Days
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£64.06 Incl. VAT
£53.38 Ex. VAT
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Product Description

Sika 1 Yellow Waterproofer - 5 Litres

Sika 1 is a chlorine free general waterproofing admixture for mortar, concrete and rendering. Sika 1 works by swelling and blocking capillaries and pores in mortar, thereby preventing the transmission of water.
A tried and tested formula for over 100 years it has excellent resistance to water pressure and is suitable for contact with potable water.


  • Structural waterproof renders to resist water pressure below ground
  • Structural waterproof screeds to resist water pressure below ground
  • Waterproof renders to resist moisture and dampness above ground level Internal waterproof tanking
  • General waterproofing admixture for mortar

Characteristics and Advantages

  • Proven for more than 90 years
  • For brick, concrete and stone substrates
  • Compatible with OPC and SRC
  • Can be applied against live water infiltration
  • Wall render and screed application
  • Can be used internally and externally

Product Documents

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Frequently Bought Together


Questions & Answers


Can this product be used on walls where there is either rising damp or porous joints between the bricks. or do you have other suggested remedy?


For this product, you would mix in with your mortar to make it more water tight (it fills the pores) - so this is normally only for a new project. If it is an existing wall, KEN004 would be a more suitable option.

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Sika 1 Yellow Waterproofer - 5 Litres

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