PS1 is a mineral-based penetrating solution formulated to manage high suction backgrounds while maintaining effective vapour permeability. It also serves to consolidate problematic surfaces and substrates or to provide gentle protection for mineral-based materials. Independently tested for vapour diffusion, PS1 ensures that water vapour safely escapes, preventing moisture from being trapped within your building's fabric.
PS1 Penetrating solution is water-based, VOC-free, odourless, and certified as vapour-permeable. It is potassium silicate-based and compatible with all products in our Silic8 range. Use it together with Lime Green's adhesives, fillers, and primers. PS1 comes in UN-certified containers of either 5.5kg or 13kg.
Common substrate types include:
- Masonry backgrounds
- Magnesium silicate boards
- Historic or new plasters such as lime, cement, or gypsum
- Stone
- Wood/wood-based boards
- Terracotta, some ceramic tiles, and paints.*
- A Lime Green in-house bond-strength testing facility is available for specific requirements.**
Preparation
- Ensure substrates are clean, dry, and free of loose debris before application.
- Test a small area first with your materials to check suitability.*
- Avoid using on contaminated surfaces, in extreme environments, or under unusual conditions.
- Do not store or operate at temperatures below 5°C or above 30°C.
- Keep in airtight containers and use within 12 months.
Application
- Apply using a broad brush or suitable spray applicator for optimal coverage.
- Ensure the surface is sound and completely dry before application.
- For powdery or friable surfaces, work the primer into affected areas with a brush for better adhesion.
- We recommend using Silic8 vapour open primers, such as MPL1 or MPL2, before applying new plaster to problematic or highly absorbent surfaces.
- Allow the primer to cure for 2-24 hours, depending on usage, temperature, and the thickness applied.
- After this curing period, vapour open plasters or adhesives can be applied at any time.
- Always verify that other products are compatible and suitable for your specific task.
Coverage
Test a small area for your coverage rates. On an even surface, 50 grams of PS1 will cover approximately 1m² (5.5kg will cover up to 110 m²). Allow more for uneven or highly absorbent surfaces.
Aftercare
- Allow the surface to dry completely before applying additional coats, plaster, or decorations.
- Wash splashes, tools, and brushes with water.
- Dispose of any leftover material following your local regulations (EWC 06 02 99).
- Cleaned tins can be reused and recycled entirely.
Technical Information
- pH value in liquid state: pH 11.1
- Odourless
- Dries off-white
- Non-hazardous
- No VOC’s
- Application rate varies according to use
- Storage life (unopened tins): 36 months if kept well sealed (protect from frost, moisture, and
temperature extremes) - Non-combustible
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* - We, nor Lime Green, are not responsible for compatibility with any substrates, whether listed or not. Substrates should be tested for suitability before use, and we accept no liability for such tests. We also disclaim any liability for misuse, failures outside our control, or consequential losses of any kind.
** - Lime Green charges a fee for this service, which provides only an estimate of the bond strength. Not all substrates can be tested at their facility. Because substrate types vary, it's recommended to test a representative area of the substrate to ensure it meets all your needs.
