Grouting demands precision. Shrinkage or settlement compromises the strongest work, leading to costly callbacks and compromised integrity. RLA Penaflow Panel Grout delivers a non-shrink, Class A solution that actively controls expansion in its plastic state. This ensures a complete, void-free fill, from underpinning to precise panel placements, right from the first application.

Why this product exists

RLA Penaflow Panel Grout was engineered as a versatile, cementitious grout to address the critical need for a stable, non-shrinking fill in construction. It leverages a blend of Portland cement, high-quality graded aggregates, and specific additives. This formulation generates a controlled gaseous expansion while the grout is still plastic, effectively eliminating shrinkage and settlement as it cures. Its non-metallic iron content prevents staining, a common issue with traditional grouts, maintaining the aesthetic integrity of surrounding materials.

The numbers that matter

• Compressive Strength: Exceeding 55 MPa at 28 days, this grout provides robust load-bearing capability. It ensures that critical elements like precast panels and machinery baseplates are supported by a foundation designed for long-term stability under heavy loads.
• Plastic State Expansion: A controlled 1-2% gaseous expansion occurs within the first 15 minutes to 3 hours of placement. This mechanism eliminates shrinkage and settlement, preventing voids and ensuring intimate contact with the substrate and surrounding elements.
• Application Depth: Designed for single applications from 20mm to 150mm. This wide range simplifies material selection for diverse grouting jobs, from fine gaps to significant cavity fills, without requiring layered application.
• Bond Strength: Achieves over 10 MPa in slant shear bond strength (ASTM C882-1987) at 28 days. This strong adhesion to concrete substrates is crucial for transferring loads effectively and preventing delamination, particularly in underpinning and anchor bolt applications.

What it's like to use

Preparing the substrate is key: saturate all areas with water for at least 4 hours before application, then remove all standing water. This pre-soaking prevents the substrate from drawing moisture from the grout, which can compromise strength. Mix RLA Penaflow Panel Grout using a mechanical mixer — an electric drill with a spiral paddle for smaller batches, or a forced-action drum mixer for larger volumes. Accurate water measurement is critical; precise ratios deliver dry pack, trowellable, or flowable consistencies. Never mix by hand or add additional water beyond specified amounts, as this will lead to segregation and bleeding. For large pours, use a positive displacement pump, ensuring continuous placement to avoid air entrapment.

Where this product excels

• Civil Construction: Ideal for underpinning, ensuring long-term stability and load transfer in structural remediation projects.
• Precast Concrete Installation: Provides reliable, non-shrink grouting underneath precast panels and concrete sections, accommodating depths from 20mm to 150mm.
• Masonry and Blockwork: Efficiently fills core holes in panels created by core drilling and serves as an effective grout for blockwork core filling, supporting structural integrity.
• General Building & Repair: Excels in filling cavities, gaps, and base infills, including securing anchor bolts where precise, void-free support is essential. It is also specified for horizontal filling in concrete areas that will be membrane-covered and tiled.

How it fits in a real system

RLA Penaflow Panel Grout commonly serves as a final, critical step in concrete repair systems. For instance, after initial heavy-duty epoxy repairs, such as those performed with Megapoxy H, this grout is applied to achieve the final, load-bearing fill. Its role as a non-shrink filler ensures that the repair sequence culminates in a stable, integrated structure, providing the necessary support before subsequent layers, like membranes or tiles, are installed.

Choose this when

• When the job demands a Class A non-shrink cementitious grout that actively compensates for shrinkage and settlement in its plastic state.
• For general purpose grouting tasks, including anchoring bolts, underpinning, or filling core holes in precast panels.
• When a single product needs to adapt to dry pack, trowellable, or pourable consistencies for depths ranging from 20mm to 150mm.
• For critical horizontal filling in concrete that will be membrane-covered and tiled, ensuring a stable and void-free base.

Don't use this when

• Not for: applications requiring additional water beyond the specified ratios, as this will lead to segregation and bleeding, compromising performance.
• Not for: use with mechanical vibrators to assist flow; this product is designed for gravity flow or pumping methods without vibration.
• Not for: application onto dry porous substrates without prior saturation. This can lead to rapid moisture loss from the grout, affecting cure and strength.
• Not for: unrestrained areas where minimum confinement cannot be maintained, as the controlled expansion requires adequate constraint to function correctly.