Cornerstone Promix Superfine lime Finishing Plaster is a premium dry ready mixed lime plaster designed for internal finishing coats within an appropriate render system. Manufactured using 100% natural hydraulic lime, carefully selected natural sands and conservation-appropriate additives, this high-quality plaster delivers a superfine texture and refined finish suitable for both traditional and modern construction projects.
Developed as part of the Cornerstone Promix render and plaster range, this lime plaster is designed for internal applications where a smooth, breathable and aesthetically pleasing finish is required. This hydralic lime plaster's superfine texture provides excellent workability and extended open time, allowing for easy application, levelling and finishing.
Suitable for use over compatible lime render systems, including Cornerstone Promix Coarse Basecoat, this product creates a durable decorative surface while maintaining the breathable characteristics associated with natural hydraulic lime construction. When trowelled, it produces a near-white finish, while a sponged finish creates a subtle off-white appearance.
Key Features
- Premium Superfine Lime Plaster: High-quality lime plaster with a superfine texture and refined finish for internal applications.
- Made with Natural Hydraulic Lime: Manufactured using ready mixed 100% natural hydraulic lime and carefully selected natural sands.
- Designed for Internal Finishing: Plaster designed for internal finishing coats within an appropriate render system.
- Breathable Lime Construction: Its breathamable lime construction supports moisture movement and vapour permeability within traditional and modern wall constructions.
- Dry Ready Mixed Formula: Supplied as a dry ready mixed product for consistent quality and ease of use. No-fuss levelling and finishing
- Excellent Workability: Extended open time allows easier application, levelling and finishing. Minimised likelihood of shrinkage cracking. This lime plaster has a faster set than a traditional lime putty plaster
- High-Quality Render and Plaster Solution: Part of the trusted Cornerstone Promix render and plaster range.
Applications
- Internal finishing coats within an appropriate render system.
- Lime render and plaster systems.
- Listed building restoration.
- Traditional masonry construction.
- Internal wall finishing.
- Internal ceiling finishing.
- Promix superfine finishing lime plaster is supplied in 20kg bag. 1 Bag covers 5.6 [email protected] Thickness
- Manufactured using 100% pure natural hydraulic lime, carefully graded natural sands and additives
- It is a dry ready mixed plaster designed for internal finishing plaster coats
- Provides a smooth, high-quality finish within appropriate render systems.
| Product Type | Finishing plaster |
| Product code | Promix Superfine |
| Brand | Cornorstone Mortars |
| Yield | A 20kg bag yields approx. 15 litres |
| Materials | Factory blended mortar using grade kiln dried sadnd, nayural hydraulic lime + additives |
| Coverage | Approx. 5.6Sqm at 2.5mm thickness |
| Fire Rating | A2 |
| Colour | White |
| Coat | Topcoat |
| Use | Internal only |
| Order Value | Delivery Charges (Excluding VAT) |
|---|---|
| 1-10 | £30 across the Mainland UK |
| 11-20 | £50 across the Mainland UK |
| Pallet Charges apply Thereafter | |
Returns/Refunds And Cancellations:
- You can cancel your order and get a full refund anytime before we confirm your order via email.
- Orders cancelled after the order confirmation is sent may attract a restocking fee.
- If you want to return insulation that was ordered in excess or not of use anymore, you can return them within 14 days from the date of receipt, provided they are unused and in a resalable condition. Please contact us via email and we will assist you accordingly.
- If the product is damaged on receipt, email us immediately
For more information on returns and deliveries, please refer to our delivery information page.

