K-Rend HPX Base Coat 25KG Bag

K-Rend HPX Base Coat 25KG Bag

K-Rend HPX Base Coat is an ultra-high-performance render designed for professional use on challenging surfaces. Formulated with advanced High Polymer technology and reinforcing fibres, this premium product delivers exceptional flexibility, durability, and adhesion — even on difficult substrates such as lightweight blocks and high-suction bricks. It can be applied by hand or machine, ensuring smooth and efficient application across both small-scale and large rendering projects. To further enhance strength and crack resistance, especially around stress points like door and window reveals, it’s recommended to use Alkali Resistant Reinforcing Mesh. Compatible with a wide range of K Rend finishes — including Dash, Scraped Texture, and Brick Rend — HPX Base Coat provides the perfect foundation for a professional, long-lasting finish that performs in all conditions.

Key Features

• High Polymer Technology: Delivers superior performance with added fibres for difficult substrates.
• Optimum Adhesion: Ensures a strong, lasting bond on a variety of surfaces.
• Exceptional Flexibility: Engineered for high flexibility to accommodate movement on unusual or lightweight substrates.
• Versatile Application: Suitable for both hand and machine application.

Product Specifications

• Application Rate: Approximately 6–9 kg/m² at a nominal 4–6 mm thickness.
• Classification: Complies with BS EN 998-1 standards.
• Compressive Strength: CS III.
• Capillary Water Absorption: Category W2.
• Thermal Conductivity: P=50% – 0.35 W/mK | P=90% – 0.40 W/mK.

Application Guidelines

• Apply a primary coat where necessary to prepare the substrate, following the specified thickness recommendations.
• Ensure a uniform finish using a Darby or straight edge.
• Establish a light key to promote strong adhesion for subsequent coats.
• Allow at least 24 hours for curing before applying further layers. For non-standard substrates, seek technical advice from K Rend.

Frequently Asked Questions

What types of surfaces can K-Rend HPX Base Coat be used on?

K-Rend HPX Base Coat is designed for difficult substrates such as lightweight blocks, high-suction bricks, and other challenging surfaces. Its advanced polymer and fibre formulation ensures excellent adhesion and flexibility.

Do I need to use mesh reinforcement with HPX Base Coat?

Yes, it’s strongly advised to use *Alkali Resistant Reinforcing Mesh* around stress points like windows, doors, and corners to prevent cracking and enhance the structural integrity of the render.

Which K Rend finishes are compatible with HPX Base Coat?

HPX Base Coat works seamlessly with multiple K Rend finishes, including Dash, Scraped Texture, and Brick Rend, providing a stable and durable base for professional-quality results.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.