Secil Eco Friendly (Natural Hydraulic Lime) Pre-Mix Range

Conservation Technology
Feb 21, 2023
3 min read

Updated: Oct 21

Find out what premix lime mortars that are available

Build Naturally. Build Better.

In the world of restoration and sustainable construction, consistency and performance are everything. That’s why more professionals are turning to Secil’s Premixed Lime Mortar Range. A complete family of ready-to-use, natural hydraulic lime (NHL) mortars designed to make every stage of the building process simpler, faster, and more reliable.

Whether you’re stabilising a surface, repointing delicate masonry, rendering walls, or applying fine decorative finishes, there’s a Secil CAL product tailored to the task.

CAL CS – Scud Coat / Consolidation Layer

Before you start rendering, ensure your substrate is ready. CAL CS is a specially formulated scud coat designed to consolidate and stabilise friable or dusty surfaces. It creates the perfect key for subsequent lime renders, helping to prevent delamination and ensuring a long-lasting bond.

Best for: Preparing weak or uneven surfaces prior to rendering.

CAL RJ – Pointing Joint Mortar

Repointing demands precision and compatibility. CAL RJ is designed specifically for pointing and repointing masonry joints, providing excellent adhesion, flexibility, and breathability. Its smooth consistency makes it easy to work with, while its natural lime base ensures long-term durability and compatibility with traditional materials.

Best for: Pointing joints in stone, brick, or block masonry.

CAL RB – Building & Rendering Mortar

The workhorse of the range, CAL RB is a robust, versatile mortar suitable for both building and rendering applications. It combines strength, workability, and breathability — ideal for heritage restorations or new sustainable builds where natural performance matters.

Best for: General masonry construction and rendering work.

CAL AC – Skim Coat (Internal & External)

For a smooth, even finish, CAL AC delivers. This pre-blended lime skim coat can be applied to both internal and external walls, providing a strong, breathable surface that’s ready for decoration. It’s easy to apply, quick to level, and gives a clean, natural finish.

Best for: Skim coats and fine levelling on internal or external lime renders.

CAL AC Fino – Fine Finish Skim (Internal Only)

When perfection matters, finish with CAL AC Fino. This fine lime skim coat is designed for internal use only, offering a silky-smooth surface ready for limewash, clay paint, or other natural finishes. It delivers the traditional look and feel that heritage restorers and eco-builders value most.

Best for: Fine finishing of internal lime plasters and renders.

🌱 Why Choose Secil Premixed Lime Mortars?

✔️ Ready to Use – Save time on-site with consistent pre-blended mixes.

✔️ Natural & Breathable – Made from pure hydraulic lime with no cement additives.

✔️ Low Waste – Mix only what you need; less mess, less material loss.

✔️ Versatile Applications – From base coats to final finishes, the CAL range covers every stage.

✔️ Sustainable Solution – Supports low-carbon, breathable building methods that respect traditional materials and modern performance needs.

🏗️ Built on Tradition. Backed by Innovation.

Secil’s CAL Range represents the best of both worlds — traditional lime craftsmanship combined with modern manufacturing precision. Each product is carefully formulated to deliver consistent results while maintaining the key benefits of natural hydraulic lime: breathability, flexibility, and environmental sustainability.

Whether you’re conserving a historic façade, repointing stonework, or finishing a contemporary eco-home, Secil Premixed Lime Mortars help you build with confidence — and build for the future.

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