ᐅ Does silicate paint adhere to painter's fleece?

Good morning everyone,

We are currently deciding on interior paint colors and have received conflicting information about silicate paint. Our substrate consists of gypsum fiberboards on the walls and drywall on the ceilings, with cellulose painter’s fleece applied on top. It is a vapor-permeable construction, so dispersion paint is not an option. We originally planned to use a high-quality silicate paint, but I was told that this wouldn’t work because the chemical bonding can’t occur, meaning the paint cannot mineralize properly. However, our house painter said it would still work.

I’ve now contacted three manufacturers about this issue and received different answers:

One suggested I check the technical data sheets for their products.
Another recommended using their natural paint combined with a primer, as this definitely adheres to the painter’s fleece.
The third company, the yellow one with three black letters, said I can use any of their silicate paints without problems, as all of them adhere to cellulose painter’s fleece. They acknowledged that no mineralization would occur, but explained that the synthetic resin modification prevents any issues.

So, what’s the real situation?

Pure silicate paints can cause some issues, but they are usually applied only by professionals. The products you can buy ready-made are mostly silicate dispersion paints. We painted the entire house with Keim paints. On the walls with fine plaster and concrete ceilings, we used Biosil, and on the walls with painter’s fleece, we used Innostar, and it worked very well. Biosil did not work as well on the painter’s fleece because the surface was not as uniform.

Silikat TopIn from Südwest was applied in our case.

I even took a photo of the paint bucket.

World-e schrieb:

Pure silicate paints might cause some issues, but they are usually applied only by professionals. Most of the ready-to-use products available are silicate dispersion paints. We painted our entire house using Keim colors. On the walls with fine plaster and concrete ceilings, we used Biosil; on the walls with painter’s fleece, we used Innostar, and it worked very well. Biosil didn’t perform as well on the painter’s fleece since the surface wasn’t as uniform.

Does silicate dispersion have significantly worse SD values than pure silicate paint? Why did you choose Keim Innostar, for example, and not Inotop? Keim paints are generally quite expensive...

haydee schrieb:

We applied Silikat TopIn from Südwest.

I even took a photo of the paint bucket on purpose.

Directly onto the painter’s fleece? Was it applied once or twice?

Reini1234 schrieb:

Does silicate dispersion have significantly worse SD values compared to pure silicate paint? Why did you choose Keim Innostar instead of Innotop, for example? Keim paints are generally very expensive...

To compare the SD value, you would need to look at the technical datasheets of the paints; I don’t know that offhand.
We chose Innostar because it is more pigmented than Innotop. I asked Keim about that. Allegedly, one coat of Innostar is enough. I couldn’t confirm this; we applied two coats in every case.
Keim paints can actually be found at reasonable prices online. They are outrageously expensive at specialist retailers. For painting the entire interior of the house, we used Keim paints for just under 1200€ (approximately $1,300).

I was only at the construction site twice a day.
I would say without primer and painted once.