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Bauherr3822 Feb 2016 18:59Hello,
I am a bit confused – on one hand, silicone resin plasters are often promoted as the ideal plaster. To quote: "Silicone resin plaster probably withstands prolonged or driving rain better than any other plaster mix. It is also resistant to chemical effects from air pollution or acid rain. Silicone resin plaster is well protected against biological attacks such as algae and fungal growth. Deposits of dirt particles, which can occur for example through the penetration of polluted rainwater into the pores and capillaries of the coating, are very difficult on silicone resin plaster."
Then I read in the technical data sheet of the silicone resin plaster from the brand Sto Silco K the following: "Not suitable for horizontal and inclined surfaces exposed to weather."
Okay, I can understand that for horizontal surfaces where water might stand on them. But inclined surfaces, where water easily drains off...?
Then I read an article recommending giving silicone resin plaster a final topcoat because only in this way can the pores in the plaster be sealed so that no water penetrates.
So what is correct? Is silicone resin plaster with an Sd-value like the Sto Silco K of 0.07 m (2.3 ft) and a water vapor permeability rate of <0.05 kg/m²·h⁰˙⁵ enough to achieve the initially quoted properties in the long term, or do you always need a topcoat to maintain this?
I am a bit confused – on one hand, silicone resin plasters are often promoted as the ideal plaster. To quote: "Silicone resin plaster probably withstands prolonged or driving rain better than any other plaster mix. It is also resistant to chemical effects from air pollution or acid rain. Silicone resin plaster is well protected against biological attacks such as algae and fungal growth. Deposits of dirt particles, which can occur for example through the penetration of polluted rainwater into the pores and capillaries of the coating, are very difficult on silicone resin plaster."
Then I read in the technical data sheet of the silicone resin plaster from the brand Sto Silco K the following: "Not suitable for horizontal and inclined surfaces exposed to weather."
Okay, I can understand that for horizontal surfaces where water might stand on them. But inclined surfaces, where water easily drains off...?
Then I read an article recommending giving silicone resin plaster a final topcoat because only in this way can the pores in the plaster be sealed so that no water penetrates.
So what is correct? Is silicone resin plaster with an Sd-value like the Sto Silco K of 0.07 m (2.3 ft) and a water vapor permeability rate of <0.05 kg/m²·h⁰˙⁵ enough to achieve the initially quoted properties in the long term, or do you always need a topcoat to maintain this?
Masipulami23 Feb 2016 10:28Our white silicone resin plaster was not coated with an additional topcoat.