Water repellent, breathable putty coat, based on siloxane dispersions

Code: PRT.0110

Components: 1

Appearance: Paste

Water-repellent, breathable, pigmented, ready-to-use plaster based on siloxane resins dispersed in water. Ideal for the protective coating resistant to water and bad weather in the renovation interventions, both of external facades and of internal environments, of civil and industrial buildings, and in new constructions.

Functional categories
Customs Code
3214 9000

Linee di appartenenza

Certification obtained and Standards

Specifications for organic binder based interior and exterior plasters

EN 15824

Specifications for organic binder based interior and exterior plasters

General characteristics


To be applied in two coats




Density: 1.72 (± 0.02) kg/dm³


Temperature of use: +8 / +30 °C


Shelf-life: 12 months

Technical specifications

Dry residue

83.8 %


7.6-8.9 _

Capillary absorption

0.23 kg•h^0.5/m²

Available colours

- White

Packaging and dimensions

- Pail 25 kg

- Pail 5 kg


PROTECH SIL I is available in 5 different sizes for the most varied applications:
- Very fine (grain ≤ 0.4 mm)
- Fine (grain ≤ 0.7 mm)
- Medium (grain ≤ 1.0 mm)
- Large (grain ≤ 1.5 mm)
- Very large (grain ≤ 2.0 mm)


Indicative consumption depending on the different particle sizes of PROTECH SIL I available:
1 mm GRAIN: approximately 1.25 -1.40 kg/m²;
1.2 mm GRAIN: approximately 1.40 -1.55 kg/m²;
2 mm GRAIN: approximately 1.85 -2.15 kg/m²;
2.2 mm GRAIN: approximately 2.00 -2.30 kg/m².
The indicated yields refer to smooth supports and are for guidance only. Actual consumption must be identified with a suitable practical test.

Use fields

"Waterproofing", water repellent, breathable, protective and decorative finish, for masonry surfaces in vintage buildings, subject to protection as "cultural heritage" or otherwise, in restoration, for new buildings, in dehumidifying systems etc.

Preparation of supports

The surfaces of application will be adequately prepared: dry, free from fouling, powder, crumbling parts, incoherent, pre-existing synthetic paints etc. Any lime and/or cement-based plaster, lime painting, compact and anchored, they can be preserved. It is essential to pre-treat with the siloxane fixative PROTECH SIL FIX.

Use method

PROTECH SIL I is ready to use, in the form of thixotropic paste which, after thorough mixing, can be applied immediately. Two layers of application are recommended, each with a thickness not exceeding the size of the calcareous grain contained in the product. After applying the second coat, when the product starts the drying stage, proceed to floating with sponge tool.

Application methods

- Finishing trowel

- Spatula

- Sponge float

Tool cleaning

- Water

Permitted supports

- Cement-based or lime-based mortars

- Concrete

- Fiber-cement

- Plasters

- Prefabricated concrete

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