Promix SuperTherm Topcoat is a premium dry ready mixed render and plaster designed for finish render coats within an the Supertherm system. Developed to provide an attractive, breathable and durable finish, this specialist lime plaster is ideal for use with high-performance insulation and render systems where moisture management and thermal efficiency are essential.
Manufactured using natural hydraulic lime, carefully graded natural sands and conservation-appropriate additives, Promix SuperTherm Topcoat delivers excellent workability, durability and long-term performance. Enhanced plasticity provides improved adhesion while the longer open time makes this render easier to apply, level and finish, helping installers achieve a high-quality result.
This 25kg bag yields approximately 15 litres of lime render or plaster when mixed, providing excellent coverage and value. The finish can be worked using a plastic or wooden float to achieve the desired surface appearance. As with all fresh lime renders and plasters, best practices for curing and protecting fresh lime renders should be followed to ensure optimum performance and durability.
Key Features
- Premium Lime Topcoat: High-quality topcoat plaster designed for finish render coats within an appropriate render system.
- Dry Ready Mixed Formula: Topcoat is a dry ready mixed render and plaster designed for consistency and ease of application.
- Natural Hydraulic Lime Composition: Manufactured using natural hydraulic lime and selected natural sands. Improves breathability
- Excellent Workability: Longer open time makes this render easier to apply, level and finish.
- Enhanced Plasticity: Enhanced plasticity supports improved adhesion and reduces the likelihood of application defects.
- Suitable for Internal Applications: Suitable for internal finishing work and specialist lime plastering applications.
Applications
- Ideal for use with Cornorstone Mortars's SuperTherm
- Finish render coats within an appropriate render system.
- Lime render and plaster systems.
- Internal plastering applications.
- Premium dry ready-mixed lime plaster designed for use with Cornerstone SuperTherm’s innovative foamed aggregate, which uses a nanometre pore structure to limit heat loss through the building envelope.
- Supplied in 25Kg bag. One bag yields approx. 15 litres
- Provides the ideal balance of strength and breathability for high-performance wall constructions.
- Supports SuperTherm’s exceptional insulation and moisture management properties.
| Product Type | Supertherm Topcoat Plaster |
| Product code | Promix |
| Brand | Cornerstone |
| Yield | A 25kg bag yields approx. 15 litres |
| Materials | Natural Hydraulic Lime, Natural Sands, Additives |
| Coverage | A 25kg bag covers approx. 2.5m² at 6mm thickness |
| Fire Rating | A1 |
| Colour | Off-White |
| Coat | Topcoat |
| Use | Internal |
| 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.
