For architects, engineers & councils
The data behind the pour.
Flowpoint is a rapid-set slurry jointing mortar for rigid, void-free joints that meets BS 7533. Here are the full test figures, documents and a spec clause.
Strength development
Usable in hours. Fully strong in 28 days.
Compressive strength from Instarmac testing at 20°C. Typical Australian residential slab concrete (N25) is shown for reference.
Technical data
Specification at a glance.
| Property | All Flowpoint grades (Flowpoint, Fine, Smooth, ECO, Premium) | |
|---|---|---|
| Product type | Pre-mixed, cement-based rapid-set slurry jointing mortar. Add water only. | |
| Standard | Conforms to BS 7533 (pavements constructed with clay, natural stone or concrete pavers) | |
| Joint width | Fine 2 to 50mm · Smooth and Premium Smooth 4 to 50mm · Flowpoint, ECO and Premium 5 to 50mm | |
| Joint depth | Minimum 20mm, up to 200mm in one application | |
| Compressive strength | 10 N/mm² at 2 hrs · 14 at 24 hrs · 25 at 7 days · 49.6 at 28 days | |
| Flexural strength (28 days) | 7.1 N/mm² | |
| Tensile strength (28 days) | 3.91 N/mm² | |
| Bond strength (28 days) | >1.5 N/mm² | |
| Shrinkage | 0.06% (Premium); shrinkage-compensated | |
| Modulus of elasticity | 19,200 N/mm² (Premium) | |
| Working time | 5 to 15 minutes, depending on temperature | |
| Trafficking | Light foot traffic 1 hour; vehicles 4 hours (at 20°C) | |
| Yield | About 13.9 litres per 25kg bag (about 72 bags per m³ of joint) | |
| Colours | Flowpoint, Fine, Smooth and ECO: Natural Grey, Charcoal · Premium: Stone Grey, Limestone, Yorkstone | |
| Recycled content | ECO: 20% recycled material | |
| Packaging | 25kg bags, 56 per pallet | |
| Shelf life / storage | 8 months sealed; store at 5 to 30°C, dry and frost-free | |
| Manufacturer QA | Made in a plant certified to BS EN ISO 9001, ISO 14001 and ISO 45001 | |
Source: Instarmac technical datasheets (Fine, version 09.07.2024; Premium, version 16.08.2024). Always check the current datasheet before specifying.
Downloads
Datasheets & documents.
PDFFlowpoint technical datasheetInstarmac · latest version
PDFFlowpoint Fine technical datasheetInstarmac · latest version
PDFFlowpoint Smooth technical datasheetInstarmac · latest version
PDFFlowpoint ECO technical datasheetInstarmac · latest version
PDFFlowpoint Premium technical datasheetInstarmac · latest version
PDFFlowpoint Fine safety data sheetInstarmac · 0.3 MB
PDFFlowpoint installation guideProlific Stone · 1 MB
Specification clause
Drop it straight into your spec.
A suggested clause to adapt to your project. Check it against the current datasheet and your project requirements.
JOINTING OF PAVING
Product: UltraScape Flowpoint [Flowpoint / Fine / Smooth / ECO / Premium / Premium Smooth] rapid-set flowable slurry jointing mortar by Instarmac Group plc, supplied in Australia by Prolific Stone International (03 8751 8880).
Colour: [Natural Grey / Charcoal] or, for Premium, [Stone Grey / Limestone / Yorkstone].
Performance: To conform to BS 7533. Minimum compressive strength 49.6 N/mm² at 28 days. Bond strength >1.5 N/mm².
Joints: [__] mm wide (within 2 to 50 mm Fine; 4 to 50 mm Smooth and Premium Smooth; 5 to 50 mm Flowpoint, ECO and Premium), filled to a minimum depth of 20 mm, void-free, in one application.
Preparation: Joints clear of debris and standing water. Paving and joints pre-soaked and kept wet throughout jointing.
Mixing: Full bag mixed with the manufacturer's stated water quantity using a paddle mixer for 3 to 5 minutes. No re-tempering.
Application: Placed with a rubber/neoprene squeegee, joints topped up as required, surplus removed, surface cleaned with a soft brush and water once the initial set is reached.
Protection: No foot traffic for 1 hour and no vehicles for 4 hours at 20 °C (adjust for temperature). Washings must not enter stormwater.
Trial: Carry out a trial area on the specified paving before full installation.
Specifier support
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