ProJoint PRO-420 ECO Colour Enhancing Natural Stone Sealer – Water Based – 1L, 5L & 25L

ProJoint PRO-420 ECO Colour Enhancing Natural Stone Sealer – Water Based

ProJoint PRO-420 ECO is a water-based colour enhancing sealer designed to protect natural stone while bringing out its natural colour, character and variation. Rather than leaving the paving looking completely untreated, PRO-420 ECO enriches the appearance of the stone to create deeper, more pronounced tones with a natural finish.

The penetrating formulation helps protect natural stone and compatible concrete surfaces against water, oil, grease, everyday staining and weathering while remaining breathable. Available in 1 litre, 5 litre and 25 litre sizes, it is suitable for everything from smaller projects to large patios and professional landscaping installations.

No 8-Week Wait Required

Unlike solvent-based sealers such as ProJoint PRO-810, PRO-420 ECO does not require newly installed paving to be left for a minimum of 8 weeks before sealing. Its water-based formulation means it can be applied much sooner in the installation process, making it a particularly useful option when you want to protect and enhance new natural stone paving without a lengthy waiting period.

The paving should still be clean and suitably dry before application. For best results, allow approximately 24–48 hours drying time after cleaning before applying PRO-420 ECO, depending on the paving, weather and site conditions.

Enhance & Protect Your Natural Stone

PRO-420 ECO is ideal when you want more than an invisible sealer. The colour-enhancing formulation brings out the natural tones and characteristics within the stone, helping create a richer appearance while providing long-lasting protection against everyday exposure and staining.

Main Benefits

• ✓ No 8-week waiting period required before sealing newly installed paving
• ✓ Enhances the natural colour and character of stone
• ✓ Creates richer, deeper natural tones
• ✓ Water-based formulation
• ✓ Penetrating sealer with a natural finish
• ✓ Breathable – allows moisture vapour to escape
• ✓ Helps protect against water, oil and grease
• ✓ Helps resist everyday staining and weathering
• ✓ Easy application using a foam roller, brush or low-pressure sprayer
• ✓ Available in 1L, 5L and 25L sizes

PRO-420 ECO or PRO-810?

Choose PRO-420 ECO when you want to enhance the natural colour of the stone and would prefer a water-based sealer that does not require the 8-week waiting period associated with PRO-810. Choose PRO-810 when you want a solvent-based invisible treatment designed to retain the existing natural appearance of the paving.

Available Sizes

• • 1 Litre – Approx. 10m² Coverage
• • 5 Litres – Approx. 50m² Coverage
• • 25 Litres – Approx. 250m² Coverage

Coverage figures are approximate and will vary depending on the porosity, texture and condition of the surface and the amount of sealer absorbed.

How to Apply

1. Prepare – ensure the paving is thoroughly clean and free from dust, dirt, grease and loose material.
2. Dry – for best results, allow approximately 24–48 hours after cleaning for the paving to dry before sealing, depending on weather and site conditions.
3. Apply – shake the container thoroughly and apply an even coat using a foam roller, suitable brush or low-pressure sprayer.
4. Additional Coats – on porous stone, apply further coats as required in accordance with the manufacturer's application guidance.
5. Protect – allow the sealer to dry and protect the treated surface from unsuitable weather during application and drying.

Ideal Uses

• ✓ Newly installed natural stone paving
• ✓ Established natural stone patios
• ✓ Sandstone paving
• ✓ Compatible limestone paving
• ✓ Paths and walkways
• ✓ Courtyards and seating areas
• ✓ Riven, smooth, honed, flamed and textured natural stone
• ✓ Compatible concrete surfaces

PRO-420 ECO is not designed for porcelain paving.