RLA Penaflow UW Grout is a cementitious construction grout specifically designed for underwater and tidal-zone placement. Its washout-resistant formulation is intended for wet structural cavities, marine piling, wharf repairs and other applications where conventional grout can be displaced by water during installation.
For conventional dry precast-panel bedding and core filling, see RLA Penaflow Panel Grout. Choose UW Penaflow when underwater placement is required. Confirm the current technical requirements for the exact installation, including substrate preparation, placement depth and water movement.
Can Penaflow Grout UW be used underwater?
Yes. It is formulated for underwater and tidal-zone grouting and is designed not to wash out when submerged.
What thickness can it be placed at?
20mm to 150mm in a single application.
What compressive strength does it reach?
The manufacturer reports more than 55MPa at 28 days.
What applications is it intended for?
Typical uses include underwater piling, wharf-column reinstatement, dam-wall work, anchor bolts and precast-panel grouting.
| Property | Value |
|---|---|
| Shelf Life | Nine months |
| Application Temperature | 10ºC - 30ºC |
| Coverage | 2.0 kg/m²/mm |
| Expansion | 1-2% (Plastic State) |
| Time for Expansion Start | 15 minutes |
| Time for Expansion Finish | 3 hours (Plastic State) |
| Modulus | 25 GPa |
| Dry Pack Water per 20kg Bag | 2.7-2.9 litres |
| Trowellable Water per 20kg Bag | 3.0-3.4 litres |
| Flowable Water per 20kg Bag | 3.6-4.0 litres |
| Dry Pack Yield per 20kg Bag | 10.3 litres |
| Trowellable Yield per 20kg Bag | 10.6 litres |
| Flowable Yield per 20kg Bag | 11.0 litres |
| Dry Pack Initial Set Time at 20°C | 1.5 hours |
| Dry Pack Final Set Time at 20°C | 2.5 hours |
| Trowellable Initial Set Time at 20°C | 3 hours |
| Trowellable Final Set Time at 20°C | 4.5 hours |
| Flowable Initial Set Time at 20°C | 4.5 hours |
| Flowable Final Set Time at 20°C | 6.5 hours |
| Compressive Strength 1 Day at 20°C | >20 MPa |
| Compressive Strength 3 Days at 20°C | >30 MPa |
| Compressive Strength 7 Days at 20°C | >40 MPa |
| Compressive Strength 28 Days at 20°C | >55 MPa |
| Flexural Strength 1 Day at 20°C | >1.5 MPa |
| Flexural Strength 3 Days at 20°C | >3.5 MPa |
| Flexural Strength 7 Days at 20°C | >8.5 MPa |
| Flexural Strength 28 Days at 20°C | >9.5 MPa |
| Bond Strength 7 Days (ASTM C882-1987) | >5 MPa |
| Bond Strength 28 Days (ASTM C882-1987) | >10 MPa |
| Fluid Flowable Grout Flow Distance 10mm Gap (100mm Head) | 1.9 meters |
| Fluid Flowable Grout Flow Distance 10mm Gap (250mm Head) | 2.0 meters |
| Fluid Flowable Grout Flow Distance 20mm Gap (100mm Head) | 2.0 meters |
| Fluid Flowable Grout Flow Distance 20mm Gap (250mm Head) | 2.5 meters |
| Fluid Flowable Grout Flow Distance 30mm Gap (100mm Head) | 2.5 meters |
| Fluid Flowable Grout Flow Distance 30mm Gap (250mm Head) | 2.8 meters |
| Fluid Flowable Grout Flow Distance 40mm Gap (100mm Head) | 2.8 meters |
| Fluid Flowable Grout Flow Distance 40mm Gap (250mm Head) | 3.0 meters |
| Fluid Flowable Grout Flow Distance 50mm Gap (100mm Head) | 3.0 meters |
| Fluid Flowable Grout Flow Distance 50mm Gap (250mm Head) | 3.2 meters |
| Fluid Flowable Grout Flow Distance 100mm Gap (100mm Head) | 3.0 meters |
| Fluid Flowable Grout Flow Distance 100mm Gap (250mm Head) | 3.5 meters |
Here are some common examples on where RLA UW Penaflow Grout used by our customers.
