FixProMaster FixJoint is a professional two-part epoxy paving grout developed for natural stone, porcelain and concrete paving. Unlike many ready-to-use single-component brush-in jointing compounds, FixJoint uses a separately mixed resin and hardener system. Once the two components are thoroughly mixed, a chemical curing reaction begins throughout the jointing material, producing a strong, dense and durable paving joint.
The 22.5kg system is designed for patios, pathways, courtyards, entrances, driveways and suitable commercial landscaping projects. Once fully cured, FixJoint forms a durable, permeable, frost-resistant and pressure-wash-resistant joint while helping to reduce weed growth and washout.
FixJoint can also be installed in damp and rainy conditions when used in accordance with the application instructions, giving professional landscapers greater flexibility in unpredictable UK weather.
Why Choose a Two-Part Epoxy Paving Grout?
The main difference between FixJoint and many common one-part brush-in jointing compounds is the curing system.
Many ready-to-use single-component products rely on exposure to air, moisture or another external curing mechanism after installation. FixJoint instead uses a two-component epoxy reaction: the resin system and hardener are mixed together immediately before application.
This produces several practical advantages.
1. The Joint Cures Throughout the Material
Once the FixJoint components have been mixed thoroughly, the chemical curing reaction takes place throughout the jointing compound rather than depending only on exposure at the surface.
This helps create a more consistent hardened joint through the filled depth when the material has been correctly mixed, installed and compacted.
This is particularly valuable where deeper, stronger joints are required rather than simply creating a hardened surface layer.
2. Stronger Joints for Frequently Used Paved Areas
After curing, the epoxy resin binds the aggregate together to form a firm and durable joint.
FixJoint technical data lists:
- Compressive strength: 38 N/mm²
- Flexural strength: 18 N/mm²
This makes FixJoint suitable for demanding external paved areas, provided the paving itself, mortar bed, sub-base and complete construction are suitable for the intended loading.
Typical applications include:
- Patios
- Garden paths
- Courtyards
- Residential entrances
- Driveways with a suitable supporting construction
- Commercial landscaped areas
The jointing compound does not provide structural support for loose slabs or an inadequate paving base. The complete paving construction must always be designed for the intended use.
3. Better Resistance to Washout and Routine Cleaning
Once fully cured, FixJoint is designed to resist washout and normal pressure-washing maintenance.
This is an important difference when compared with weaker jointing materials that may gradually erode, loosen or wash out under repeated cleaning.
Pressure washing should still be carried out sensibly. Avoid concentrating an excessively powerful jet directly into the joints at very close range, and allow the grout to cure fully before cleaning.
4. Frost-Resistant After Curing
FixJoint is designed for external paving exposed to normal UK weather conditions and is resistant to frost once correctly installed and fully cured.
This makes it suitable for paving that remains outdoors throughout the year.
As with all external paving, frost performance also depends on correct drainage, stable bedding and avoiding prolonged trapped water within the paving construction.
5. Permeable Paving Joints
FixJoint forms a permeable joint, allowing water to pass through the cured jointing material.
This can assist surface-water management when FixJoint is used as part of a correctly designed paving system.
Important: A permeable jointing compound does not automatically make the complete patio or driveway permeable. Overall drainage depends on the paving slabs, bedding layer, supporting base, falls and site drainage design.
6. Helps Resist Weed Growth
When the joints are completely filled and correctly cured, FixJoint creates a dense bonded joint that helps reduce the opportunity for weeds to establish directly within the jointing material.
This can significantly reduce routine joint maintenance compared with loose sand or deteriorated pointing.
However, no paving grout can guarantee a completely weed-free surface. Wind-blown seeds can germinate in soil, dust and organic matter that accumulates on top of any paving joint.
7. Suitable for Damp and Rainy Conditions
One of the practical advantages of FixJoint is its ability to be installed in damp and rainy conditions, subject to the product instructions.
The paving surface is deliberately saturated with clean water before application, and the surface should remain wet while the mixed compound is being worked into the joints.
This can make scheduling easier for professional installers working in changeable UK weather.
Heavy rainfall, concentrated water flow or conditions capable of physically disturbing freshly installed material should still be avoided before the grout has cured.
FixJoint vs One-Part Brush-In Jointing Compound
| Feature | FixJoint Two-Part Epoxy | Typical One-Part Brush-In Compound |
|---|---|---|
| Curing system | Resin and hardener are mixed to start a controlled chemical reaction | Usually supplied ready mixed and cures through the manufacturer's specified air/moisture curing mechanism |
| Joint strength | High-performance epoxy system with published strength data | Varies considerably between products |
| Depth of cure | Chemical reaction occurs throughout correctly mixed material | Depends on formulation, joint depth and curing conditions |
| Pressure washing | Designed to resist appropriate pressure-washing maintenance after full cure | Resistance varies by formulation and product |
| Wet-weather installation | Can be installed in damp and rainy conditions subject to instructions | Depends on individual product specification |
| Frost resistance | Designed for external frost exposure after curing | Varies between products |
| Permeability | Permeable cured joint | Depends on formulation |
| Mixing | Requires accurate and complete mixing before use | Usually supplied ready to use |
| Working time | Approximately 20 minutes at 20°C | Varies by product |
One-part compounds remain useful where convenience and fast application are the main priorities. However, where joint strength, resistance to repeated cleaning and longer-term joint integrity are more important, a properly specified two-part epoxy system can offer significant advantages.
Why FixJoint Stands Out from Other Epoxy Paving Grouts
The epoxy resin system is only one part of a paving grout. The aggregate used within the joint also affects its appearance and long-term colour characteristics.
Natural-Coloured Aggregate Rather Than Surface-Dyed Sand
One of the important characteristics of FixJoint is the use of naturally coloured aggregate rather than relying on a colour coating applied only to the outside of the sand grains.
With surface-dyed aggregates, the freshly installed joint can initially look very similar to naturally coloured aggregate. The difference can become more relevant after long-term abrasion and weather exposure.
If colour exists mainly as a surface treatment on the aggregate, abrasion of that outer layer can potentially reveal a different underlying sand colour.
With naturally coloured aggregate, the visible colour comes from the aggregate itself rather than from a superficial colour coating. This helps provide a more stable and natural-looking joint appearance as the paving is exposed to normal use and weathering.
Why This Matters for Porcelain Paving
Porcelain paving has very low water absorption and a dense manufactured surface. Because contaminants generally remain on or close to the surface rather than being absorbed deeply into the tile, careful selection and clean-off of jointing materials is particularly important.
Using naturally coloured aggregate avoids relying on a surface dye on the sand particles and therefore reduces one potential source of colour transfer associated with some coloured aggregate systems.
This is one reason FixJoint has been developed for use with porcelain paving as well as natural stone and concrete paving.
Porcelain installation: No resin jointing product should be described as incapable of leaving residue under every installation condition. Keep porcelain wet during application, remove all excess material before curing and test the product on a small area where the surface texture or finish is unfamiliar.
Suitable for Porcelain, Sandstone, Granite, Limestone and Concrete
FixJoint can be used with a wide range of exterior paving materials, including:
- Porcelain paving slabs and outdoor tiles
- Indian sandstone paving
- Granite paving slabs
- Granite setts and cobbles
- Limestone paving slabs
- Concrete paving slabs
- Concrete block paving where compatible with the intended construction
Always check the exact paving finish before application. Highly textured, unusually porous or very pale paving should be tested first to confirm the required clean-off procedure and final appearance.
FixJoint Technical Data
| Product Type | Two-part epoxy paving grout |
|---|---|
| Pack Size | 22.5kg |
| Colours | Natural, Mid Grey and Basalt |
| Minimum Joint Width | 5mm |
| Minimum Joint Depth | 20mm |
| Mixing Time | Approximately 3–5 minutes |
| Application Temperature | 3°C to 25°C |
| Pot Life at 20°C | Approximately 20 minutes |
| Foot Traffic at 20°C | Approximately 12 hours* |
| Light Vehicle Traffic at 20°C | Approximately 24 hours* |
| Compressive Strength | 38 N/mm² |
| Flexural Strength | 18 N/mm² |
| Shelf Life | 18 months from date of manufacture |
*Curing and traffic times depend on temperature, site conditions and installation. Follow the current Technical Data Sheet and product packaging.
Approximate Coverage per 22.5kg Tub
Coverage depends heavily on slab dimensions, joint width and joint depth. Approximate coverage published for FixJoint includes:
| Joint Size | 900 × 600mm Slabs | 600 × 600mm Slabs | Four-Size Patio Pack | 100 × 100mm Setts |
|---|---|---|---|---|
| 5 × 25mm | Up to 50m² | Up to 42m² | Up to 36m² | Up to 7m² |
| 10 × 25mm | Up to 25m² | Up to 21m² | Up to 18m² | Up to 3.5m² |
| 15 × 25mm | Up to 16.5m² | Up to 14m² | Up to 12m² | Up to 2.3m² |
These figures are approximate. Actual consumption will vary with paving tolerances, joint geometry, surface texture, wastage and installation technique.
How to Apply FixJoint
1. Check the Paving Construction
All paving slabs, blocks or setts must be firmly installed and stable before jointing. Fix loose paving and any structural movement before applying FixJoint.
2. Prepare the Joints
Remove dust, dirt, oil, grease, organic matter, weeds and loose material.
Joints should be at least:
- 5mm wide
- 20mm deep
3. Saturate the Paving
Thoroughly wet the paving surface and the joints with clean water. Ensure they are fully saturated, then allow standing water to drain away.
Keep the paving surface wet during application.
4. Mix the Complete Pack
Wearing appropriate PPE, place the supplied aggregate mixture into the mixing container and add the entire contents of the hardener.
Mix thoroughly with a suitable mechanical whisk or paddle mixer for approximately 3–5 minutes until completely uniform.
Do not estimate partial mixing ratios unless specifically permitted by the manufacturer's instructions.
5. Work the Material into the Joints
Pour the mixed FixJoint onto the wet paving and use a rubber squeegee to work the compound firmly into the joints.
Ensure the joints are completely filled rather than merely covered at the surface.
6. Compact and Clean
Compact the grout where required with a suitable jointing tool.
Use a soft brush diagonally across the paving to remove surplus material while keeping the joints full.
Remove all excess material and resin residue before curing. Cured epoxy residue can be difficult to remove.
7. Allow the Joint to Cure
At approximately 20°C, the Technical Data Sheet gives indicative curing periods of:
- Approximately 12 hours before foot traffic
- Approximately 24 hours before light vehicle traffic
Lower temperatures and different site conditions may increase curing time.
FixJoint Colours
FixJoint is available in three colours:
- Natural – suitable where a lighter, warm neutral joint is preferred
- Mid Grey – a versatile grey joint suitable for many sandstone, granite and porcelain colours
- Basalt – a darker joint for charcoal, black and darker grey paving
Joint colour should be assessed against the actual paving. Screen photographs and individual samples may not reproduce the finished colour exactly.
Is FixJoint the Best Paving Jointing Compound?
There is no single paving grout that is objectively the best choice for every paving project. Different jointing products are designed for different substrates, traffic levels, joint dimensions, budgets and installation methods.
However, FixJoint combines several characteristics that distinguish it from many basic brush-in jointing compounds:
- Two-part chemically curing epoxy system
- 38 N/mm² published compressive strength
- 18 N/mm² published flexural strength
- Suitable for natural stone, porcelain and concrete paving
- Natural-coloured aggregate rather than relying on surface-dyed sand
- Suitable for damp and wet-weather application
- Permeable cured joints
- Resistance to frost and washout
- Suitable for appropriate pressure-washing maintenance after curing
- Helps resist weed growth
- Suitable for residential and demanding landscaping applications when the complete construction is correctly designed
For installers looking for a stronger alternative to a basic ready-to-use brush-in compound, these characteristics make FixJoint a particularly strong option.
Frequently Asked Questions
Is FixJoint a one-part or two-part jointing compound?
FixJoint is a two-part epoxy paving grout. The hardener is mixed with the supplied resin and aggregate system immediately before installation.
Can FixJoint be used with porcelain paving?
Yes. FixJoint is designed for porcelain paving as well as natural stone and concrete paving. The paving should remain wet during application and excess resin and aggregate must be removed before curing.
Can FixJoint be applied when it is raining?
FixJoint can be installed in damp and rainy conditions subject to the manufacturer's application instructions. Avoid heavy rainfall or concentrated water flow capable of disturbing freshly installed grout before curing.
Is FixJoint permeable?
Yes. The cured joint is permeable. However, the complete paved area is only permeable if the bedding, base and drainage construction also allow water to pass through or drain appropriately.
Can FixJoint stop weeds?
A properly filled FixJoint joint helps resist weeds growing through the jointing material. It cannot prevent seeds from germinating in dirt or organic matter that later accumulates on the paving surface.
Can FixJoint withstand pressure washing?
Once fully cured, FixJoint is designed to resist appropriate pressure-washing maintenance. Avoid unnecessarily aggressive cleaning techniques or directing a concentrated jet continuously into the joints.
Can FixJoint be used on driveways?
FixJoint can be used in suitable driveway systems, but the paving, bedding, sub-base and edge restraints must all be designed for the expected vehicle loading. Jointing grout cannot compensate for an inadequate structural base.
What is the minimum joint width?
The minimum joint width is 5mm. The minimum stated joint depth is 20mm.
How long does FixJoint take to cure?
At approximately 20°C, the published technical data indicates around 12 hours before foot traffic and around 24 hours before light vehicle traffic. Actual curing depends on temperature and site conditions.
How long is the working time after mixing?
The approximate pot life is 20 minutes at 20°C. Prepare the paving before mixing so the complete batch can be applied within the available working time.
Does FixJoint colour fade?
FixJoint uses naturally coloured aggregate rather than relying solely on a surface colour coating on the sand particles. This removes one potential mechanism by which abrasion of a surface-dyed aggregate can change its appearance. As with all outdoor paving materials, the final appearance will still be influenced by weathering, dirt, cleaning and environmental exposure.
Can FixJoint stain porcelain paving?
FixJoint is designed for use with porcelain, but correct installation and clean-off remain essential. Keep the paving wet during application and remove all excess material before the epoxy cures. Test first where the porcelain has an unusual texture or finish.
Important Installation Note
FixJoint is a high-performance jointing material, but successful paving depends on the complete installation. Paving must be firmly bedded, joints must have adequate width and depth, drainage must be correctly designed and the grout must be mixed and applied according to the current Technical Data Sheet.
Always read the latest Technical Data Sheet (TDS), Safety Data Sheet (SDS) and product packaging before use.
Buy FixJoint Two-Part Epoxy Paving Grout
Ready to use FixJoint on your paving project? Buy FixJoint Two-Part Epoxy Paving Grout here.
