Since 1992

Sika Proof 5 Litre


£6.90 inc. VAT



Sika Proof is a liquid waterproofing admixture designed for use in mortars, renders and screeds designed for use in tanks, pools, ponds and below ground applications.


  • Supplied ready to use.
  • Lowers porosity.
  • Improved impermeability and absorption characteristics.
  • Better resistance to freeze thaw cycles.
  • Reduces passage of efflorescence.

Areas for Use

  • Swimming pools.
  • Water tanks.
  • Ponds.
  • Below ground structures.


  • Use only fresh ordinary Portland cement.
  • Do not overdose.
  • Do not dilute.
  • It is the users responsibility to determine suitability for use.
  • If in doubt contact Technical Services for advice.

Surface Preparation

  • Careful surface preparation is essential to achieve a durable bond to the substrate.
  • Ensure the substrate is sound, clean and free of dirt, dust and grease.
  • Remove all cracked, loose and flaking render, plaster, paint.
  • For porous substrates first pre-wet and prime with a bonding slurry consisting of cement and Sikabond SBR+.
  • Apply mortar directly working 'wet-on-wet'.

Application Sika Proof should be dispensed into the mixture with the gauging water. Cement mortar mixes must be proportioned as fit for purpose to ensure durability in terms of density and strength. Protect all mortars etc from premature drying refer to working practice of mortars in accordance with BS 5628 Part 3). Sika Proof cannot be used as a substitute for DPC (damp-proof course).

Customer reviews


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