BAL - Prime APD 2.5 Ltr

18.99 GBP
BAL - Prime APD 2.5 Ltr

Availability: In stock

RRP: £35.68

Our Price:
£18.99 inc VAT


BAL Prime APD Primer is used in the preparation of wall and floor backgrounds prior to the application of any levelling compounds and the BAL WP1 Waterproof tanking Kit.

BAL Prime APD Primer is a modified acrylic polymer dispersion which isolates products contain calcium sulphate. Gypsum plaster, anhydrite screeds, and cement-based adhesives may contain calcium sulphate.

The BAL Prime APD Primer minimises the risk of reaction between the two materials and provides surface strength to friable surfaces. It reduces porosity - preventing air bubbles and prolonging the flow time of levelling compounds and extending the open time of tile adhesives.

Key features and benefits include:

  • Pack size: 2.5L
  • Coverage: Undiluted: 100-200ml/m2, Diluted (1:1): 50-100ml/m2
  • Drying time: 15-30 minutes
  • Colour: Blue, ensuring a complete and even coating is obtained

Recommendations for BAL Prime APD Primer

  • Diluted usage (1:1): Use the diluted primer on dusty or porous plaster walls (when using BAL ready-mixed adhesive) and cement floors
  • Undiluted usage: Use the undiluted primer on plaster walls and plasterboard (when using a BAL cementitious adhesive), tongued and grooved floorboards, and anhydrite screed floors


Use For
  • Preparing floor and wall backgrounds prior to fixing of ceramic/mosaic and natural stone tiles
  • Dry/wet - interior/exterior
Use diluted on
  • Plaster walls/plasterboard when using a BAL cementitious powder adhesive
  • Tongue & groove floorboards
  • Anhydrite screed floors
May be tiled after 30 minutes
Use diluted 1:1 on
  • Dusty/porous plaster walls when using a BAL ready-mixed adhesive
  • Cement: sand screed/concrete floors
  • Stabilises dusty tiling substrates
  • Reduces background porosity

Typical Coverage (per pack)

Size Undiluted Diluted 1:1 with clean water
2.5L 12.5 - 25m2 25 - 50m2

Delivery options Our delivery costs vary according to order size and location. For more information see our Delivery page

  • The Underfloor Heating Store offer a next working day as standard
  • The Underfloor Heating Store offer a next working days delivery before 10:30
  • The Underfloor Heating Store offer a saturday delivery
  • The Underfloor Heating Store offer a 2-3 working day delivery on bulky items

As standard we include FREE next working day delivery to all UK mainland addresses (excluding, Channel Islands & Eire) on all heating products. For bulky orders we include a FREE 2-3 working day delivery.

  • Trusted delivery partners

  • The Underfloor Heating Store deliver via UPS
  • The Underfloor Heating Store deliver via Parcel Force
  • The Underfloor Heating Store deliver via Royal Mail
  • The Underfloor Heating Store deliver via Palletways

Feefo Reviews

Feefo Reviews - Average 100% (12 reviews)

Date Score Customer Comment Our Response
31-May-2017 Product:

Easy to mix and apply and does the job well.
05-Jan-2017 Product:

Easy to use, and effective primer - no odour.
28-Dec-2016 Product:

easy to apply. clear instructions
19-Dec-2016 Product:

22-Nov-2016 Product:

As Above
18-Oct-2015 Product:

As Above
17-May-2015 Product:

23-Feb-2015 Product:

09-Feb-2015 Product:

good stuff
02-Feb-2015 Product:

20-Dec-2014 Product:

Great product.
07-Aug-2014 Product:

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