Product Data Sheet Show all documents

SikaCeram® P 302

(former MasterTile® P 302)

SOLVENT FREE MODIFIED ACRYLIC RESIN DISPERSION PRIMER

SikaCeram® P 302 is a 1-component, multi-purpose, acrylic, moisture barrier and primer. It protects thin bed mortars and levelling compounds from rapid absorption of water, increases open time, improves adheson and prevents formation of shrinkage cracks. Its blue colour allows easier coverage control. Suitable for use in hot and tropical climatic conditions.

  • Waterborne, no damage to environment and operative by solvent vapours.
  • No danger of fire or explosion. No harmful vapours.
  • Improves the adhesion of tiles over gypsum based substrates
  • Protects thin-bed mortars and levelling compounds from rapid dehydration, extends the open time, improves adhesion and prevents formation of cracks caused by shrinkage.
  • Prevents formation of air bubbles and rapid dehydration when levelling floors with underlayments
 
Product Data Sheet Show all documents

Usage

  • For indoor and outdoor use
  • For walls and floors
  • Acting as a moisture barrier and primer for plaster, plaster slabs, gypsum fibre boards, plaster boards, aerated concrete, concrete, asphalt, render and brickwork before tiling and wallpapering
  • Primer for anhydrite screeds and building boards
  • Primer for aerated concrete, sand-lime brick, brickwork and concrete on walls prior to the application of plaster and lime plastering
  • Primer prior to the application of Sikalastic®  WP 668 on porous substrates
  • Priming prior to the application of self-levelling floor underlayments from SikaLevel® range and other mortars and anhydrite screeds which set through hydration
  • Primer to strengthen mealy, absorbent screed surfaces and plasters indoors prior to the laying of tiles and mosaic
  • For priming absorbent substrates to protect subsequent materials from rapid dehydration
 

Advantages

  • Waterborne, no damage to environment and operative by solvent vapours.
  • No danger of fire or explosion. No harmful vapours.
  • Improves the adhesion of tiles over gypsum based substrates
  • Protects thin-bed mortars and levelling compounds from rapid dehydration, extends the open time, improves adhesion and prevents formation of cracks caused by shrinkage.
  • Prevents formation of air bubbles and rapid dehydration when levelling floors with underlayments
 

Packaging

20 L

Colour

Blue

Product Details

Product Information

Composition

Modified acrylic resin dispersion

Shelf life

12 months from date of production

Storage conditions

Store in undamaged, unopened, original sealed packaging in dry conditions at temperatures between -10°C and +40°C. Protect from direct sunlight, heat and moisture. If frozen, SikaCeram® P 302 should be slowly thawed and stirred thoroughly.

Density

~1.0 g/l (25°C)

Application

Application Information

Mixing ratio

Can be used as Undiluted or Diluted with water in 1 : 1 ratio, depending from the substrate type.

Ambient air temperature

+5°C min. / +40°C max.

Substrate temperature

+5°C min. / +40°C max.

Tack free time

Walkable after 30 - 60 minutes, at +23°C and 50 % relative humidity.

Note: Times are approximate, subjected to substrate absorbency and will be affected by changes in ambient conditions, particularly temperature and relative humidity. Higher temperatures reduce, lower temperatures increase the times given.

Waiting time to overcoating

Overcoating by itself: Min. 30 minutes, at +23°C and 50 % relative humidity.

Note: Times are approximate, subjected to substrate absorbency and will be affected by changes in ambient conditions, particularly temperature and relative humidity. Higher temperatures reduce, lower temperatures increase the times given.

Drying time

Subsequent application: Min. 60 minutes, at +23°C and 50 % relative humidity.

Note: Times are approximate, subjected to substrate absorbency and will be affected by changes in ambient conditions, particularly temperature and relative humidity. Higher temperatures reduce, lower temperatures increase the times given.

 
Consumption

Consumption

As a general guide:

Substrate:

Consumption:

Undiluted 

SikaCeram® P 302

Gypsum based substrates, anhydrite screeds, mastic asphalt screeds, xylolith screeds, screeds with old adhesive residues.

80 to 150 ml/m²

Diluted 

SikaCeram® P 302

(1:1 with water)

Absorbent mineral substrates, e.g. concrete, sand-cement screeds, gauged renders, aerated concrete, limestone or similar.

1st coat: 100 to 200 ml/m²

 

2nd coat: 50 to 70 ml/m²

Note: These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, wastage or any other
variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions.
Application steps

SUBSTRATE PREPARATION

The substrate must be sound, clean and able to bear weight. Oil stains, bond-breaking residues such as waterproof adhesive residues, cement paste, and dirt must be thoroughly removed. Newly applied cement screeds must not have a moisture content above 4 %, ground anhydrite and/or gypsum-based screeds not more than 0.5 % (measured with CM meter).

APPLICATION

Priming and strengthening of gypsum-based substrates, anhydrite, mastic asphalt and xylolith screeds as well as screeds with old adhesive residues (not suitable with water soluble adhesive residues, e.g. sulphite liquor adhesives), as follows: 

  • Stir SikaCeram® P 302 well prior to the application.
  • Apply a sufficient quantity of undiluted SikaCeram® P 302 by brush or float to achieve a uniform coat. Avoid puddles forming!
  • Check strengthening and curing by scratching the surface. Do not apply tile adhesive, wallpaper, paint, plaster SikaLevel®-528, SikaScreed®-538 until SikaCeram® P 302 has completely cured.

 

 

Priming and strengthening of absorbent mineral substrates, e.g. concrete, sand-cement screeds, gauged renders, aerated concrete, limestone or similar, as follows:

  • Stir SikaCeram® P 302 well, dilute in 1 : 1 ratio with water and mix thoroughly.
  • Apply a sufficient quantity of diluted SikaCeram® P 302 by brush or float to achieve a uniform coat.
  • In case of very absorbent substrates it is recommended to apply a second coat of SikaCeram® P 302, diluted 1 : 1 with water to achieve a more intensive strength and to avoid bubbles forming. Do not apply the second coat until the first one has completely cured.
  • After the primer has cured (scratch proof) apply tile adhesive, wallpaper, paint, plaster, SikaLevel®-528 or SikaScreed®-538.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be mechanically removed.

 

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