The K-Rend HP12 Base Coat is a versatile, high-performance render base designed for application on difficult substrates, including render carrier boards, dense blockwork, unpainted render, and brickwork. It utilises High Polymer Technology to enhance adhesion and water resistance, ensuring a robust base for all K-Rend finishes, including Scraped Texture, Thin Coat, Dash, Roughcast, and Brick Rend.

Ideal for both hand and machine application, the HP12 Base Coat is perfect for projects requiring a reliable stipple coat or a strong foundation for dense backgrounds. It offers exceptional durability, ensuring a smooth and long-lasting render finish, especially when used with K Rend R7 Primer for maximum performance. The use of Alkali Resistant Reinforcing Mesh is recommended at stress points like door and window reveals to ensure extra reinforcement.

Key Features & Benefits:

Technical Specifications:

Application Instructions:

Ideal Applications:

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K-Rend HP12 Base Coat 25kg – Polymer Render for Difficult Substrates - Armstrong Cheshire

The K-Rend HP12 Base Coat is a versatile, high-performance render base designed for application on difficult substrates, including render carrier boards, dense blockwork, unpainted render, and brickwork. It utilises High Polymer Technology to enhance adhesion and water resistance, ensuring a robust base for all K-Rend finishes, including Scraped Texture, Thin Coat, Dash, Roughcast, and Brick Rend.

Ideal for both hand and machine application, the HP12 Base Coat is perfect for projects requiring a reliable stipple coat or a strong foundation for dense backgrounds. It offers exceptional durability, ensuring a smooth and long-lasting render finish, especially when used with K Rend R7 Primer for maximum performance. The use of Alkali Resistant Reinforcing Mesh is recommended at stress points like door and window reveals to ensure extra reinforcement.

Key Features & Benefits:

Technical Specifications:

Application Instructions:

Ideal Applications:

K-Rend
Plaster
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K-Rend HP12 Base Coast 25kg

£15.50
The K-Rend HP12 Base Coat (25KG Bag) is a versatile, high-performance preparation coat, designed for all K-Rend top coats, offering superior adhesion and water resistance.

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The K-Rend HP12 Base Coat is a versatile, high-performance render base designed for application on difficult substrates, including render carrier boards, dense blockwork, unpainted render, and brickwork. It utilises High Polymer Technology to enhance adhesion and water resistance, ensuring a robust base for all K-Rend finishes, including Scraped Texture, Thin Coat, Dash, Roughcast, and Brick Rend.

Ideal for both hand and machine application, the HP12 Base Coat is perfect for projects requiring a reliable stipple coat or a strong foundation for dense backgrounds. It offers exceptional durability, ensuring a smooth and long-lasting render finish, especially when used with K Rend R7 Primer for maximum performance. The use of Alkali Resistant Reinforcing Mesh is recommended at stress points like door and window reveals to ensure extra reinforcement.

Key Features & Benefits:

  • High Polymer Technology: Designed for enhanced performance on difficult substrates.
  • Difficult Substrate Compatibility: Perfect for dense backgrounds such as render carrier boards and brickwork.
  • Versatile Finish: Compatible with a range of K-Rend finishes, including Thin Coat.
  • Hand or Machine Application: Can be applied manually or using a machine for increased flexibility on-site.
  • Water Resistance: Improved water-resistant properties ensure long-lasting protection.
  • Reinforcement Ready: Can be used with Alkali Resistant Reinforcing Mesh at stress points for added stability.

Technical Specifications:

  • Coverage: Requires 8-11kg per m² (nominal thickness: 4-6mm)
  • Maximum Thickness: Up to 12mm on masonry substrates
  • Compressive Strength: CS IV (in accordance with BS EN 998-1)
  • Capillary Water Absorption: W2
  • Thermal Conductivity: P=50% - 0.61 W/mK

Application Instructions:

  • Apply as a primary coat where required, with thickness specified by the product guidelines.
  • Straighten using a Darby or straight edge to ensure uniform application of the next coat.
  • For best results, form a light key and allow 24 hours curing time before applying subsequent coats.
  • For unusual substrates, contact technical support for guidance.

Ideal Applications:

  • External rendering projects with difficult substrates
  • Residential and commercial buildings needing a robust, water-resistant base coat
  • Perfect for projects requiring a thin coat finish or other textured render styles

High-Performance Base Coat for All K-Rend Finishes


The K-Rend HP12 Base Coat offers superior adhesion and water resistance, making it the ideal preparation for all K-Rend top coats. Featuring High Polymer technology, it performs exceptionally well on tough substrates such as render carrier boards, dense blocks, unpainted render, and brickwork. Pair it with K Rend R7 Primer for optimal results.
This versatile base coat can be hand or machine applied, ensuring a durable and smooth base, even on dense backgrounds. Perfect for stipple coats, HP12 Base Coat delivers a strong key, preparing surfaces for a wide range of K-Rend finishes.

Versatile and Easy to Apply


HP12 Base Coat is suitable for both hand and machine applications, adapting to various project requirements. Its high water resistance and advanced bonding make it a reliable choice for difficult substrates, ensuring a smooth, durable finish.

Enhanced Durability with Reinforcing Mesh


For added strength and durability, the incorporation of Alkali Resistant Reinforcing Mesh at stress points like door and window reveals helps prevent cracks, ensuring long-lasting performance on any surface.

Compatible with Multiple K-Rend Finishes


HP12 Base Coat works seamlessly with all K-Rend finishes, including Scraped Texture, Thin Coat, Dash, Roughcast, and Brick Rend. Whether you're tackling a residential or commercial project, it provides the perfect base for a flawless finish.

Reliable Performance on Challenging Substrates


Built with High Polymer technology, the HP12 Base Coat ensures excellent performance on dense or uneven surfaces, offering both water resistance and adhesion for long-lasting results.

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