Terrix® PR-PS-P
primer for polymer-silicate paints
High-quality primer based on an acrylic dispersion, enriched with siloxane hydrophobic additives.
It is used as a preparatory coat prior to the application of Terrix® polymer silicate exterior finishing coats and for the hydrophobic impregnation of absorbent building substrates
in exterior applications.
It is also suitable for priming mineral substrates such as concrete, traditional lime renders, lime-cement renders and cement renders, as well as thin-film mineral, silicate
and polymer silicate renders. It can be applied to substrates coated with well-bonded synthetic coatings.
This impregnation is particularly recommended for porous and weathered substrates, including concrete, cement screeds, lime-based or cement-based renders, fibre cement boards, and uncoated surfaces of bricks, blocks, hollow bricks and similar ceramic
or silicate materials.
Benefits
Main properties:
- Improves paint adhesion;
- Reduces and evens out substrate absorbency;
- Provides high vapour permeability;
- Protects against staining and efflorescence;
- Reduces dusting;
- Does not affect the colour of the substrate;
- Very good adhesion to mineral substrates.
Technical Data
Base binder: silicone-acrylic;
VOC content: Cat. A/h, the product contains less than 30 g/L VOC;
Density: approx. 1.05 g/cm³;
Colour: milky, colourless when dry;
Usage: approx. 0.11 – 0.20 L/m2 (depending on substrate absorbency);
Temperature of application (air and substrate): from +5 °C to +25 °C;
Relative humidity: ≤ 75 %*;
Packaging: 10 L plastic container;
Storage: store in the original, sealed container in a cool, dry and frost-protected area. After opening, reseal the container and use the remaining product as soon as possible;
Shelf life: 12 months from the manufacture date specified on the packaging, provided
that the storage requirements are observed.
*Usage conditions:
Application at higher relative humidity is possible, provided that condensation is avoided
and the coating is protected from prolonged exposure to moisture. Drying time may be extended; allow the primer to dry completely before applying the finishing coat.
CAUTION: Keep the product out of reach of children.
Application
Substrate preparation:
Apply to a sound, clean substrate (free from cracks and delamination), degreased, even, dry, and free from biological growth and chemical efflorescence. The substrate must be free from algae and fungal growth. Where microbial contamination is present, clean
the substrate using a pressure washer. Then apply a suitable biocidal wash in accordance
with the relevant product instructions. Remove any loose material not bonded
to the substrate (e.g. loose render or flaking paint). Wash and degrease old and/or dirty substrates with water and an appropriate cleaning agent.
If the substrate has significant irregularities, level using Terrix® RD-LB levelling compound. Slight irregularities can be levelled using Terrix® RN-LF 8
or an equivalent product.
Highly absorbent substrates should be primed with a suitable penetrating primer before applying the levelling mortar.
Allow a minimum of 2 weeks for curing on newly constructed mineral substrates
(e.g., concrete, lime render, lime-cement render, and cement render).
Preparation:
The packaging contains a ready-to-use product.
If required, dilute with a small amount of clean water, up to a maximum of 5% for the first coat.
Application method:
Apply to the substrate by brush, roller or spray.
For highly absorbent substrates, two coats are recommended using the wet-on-wet method.
Drying:
The drying time of the primer on the substrate before applying the finishing coat
is approx. 12 hours.
Protect the freshly applied primer from precipitation and condensation until completely dry.
Note: Full hydrophobic properties of the coating are achieved after 7 days.
Application conditions:
During application and drying, weather conditions must be rain-free and the air
and substrate temperature should be between +5 °C and +25 °C. Low temperatures
and high humidity may slow down drying; allow the primer to dry completely before applying the finishing coat.
Clean tools immediately after use with water.
Do not apply on surfaces exposed to direct sunlight or strong winds. The use of suitable protective scaffold sheeting or nets is recommended to protect the uncured coating
from adverse weather conditions.
Case study
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