ProJoint Titan vs ProJoint RapidFlow: which epoxy paving grout is right for your project?

Both ProJoint Titan and ProJoint RapidFlow are two-part epoxy paving grouts from Nexus. Both cure to a hard, weed-free, frost-resistant joint and outperform air-cure jointing compounds in areas of heavy use. But they are not interchangeable, and choosing the wrong one for your paving type or project conditions will cause problems.

This guide sets out the key differences so you can make the right call before you order. You can shop both products on Solseal – ProJoint Titan and ProJoint RapidFlow.

This is the decision point for most projects.

ProJoint Titan is not suitable for porcelain paving.

The epoxy resin in Titan leaves a sheen on the surface after application. On natural stone this enriches and darkens the surface colour. On porcelain, the same sheen appears uneven and patchy because of the density and impermeability of the material. It does not resolve cleanly with weathering in the same way.

ProJoint RapidFlow is suitable for both porcelain and natural stone.

It is specifically formulated to work on porcelain without leaving the resin sheen issue that Titan produces. If the project involves porcelain paving, RapidFlow is the correct product.

ProJoint Titan

• Sandstone
• Limestone
• Travertine
• Granite
• Basalt
• Slate
• Quartzite
• Concrete and manmade paving slabs
• Clay pavers and setts
• Cobbles

ProJoint RapidFlow

• All of the above
• Porcelain paving slabs and tiles

RapidFlow requires a full solid bed with either a permeable bedding mortar or a recommended 1:5 mix of sand and cement.

If the project is natural stone or concrete only, either product can work. If it involves porcelain, RapidFlow is the only appropriate choice of the two.

ProJoint Titan is rated for vehicular areas up to 10 tonnes. This makes it suitable for driveways, vehicle crossings and any area that needs to carry cars, vans or light commercial vehicles.

ProJoint RapidFlow does not carry a stated vehicular load rating on the product data sheet. It is listed as suitable for paths and patios. If the project involves a driveway or any area with vehicular traffic, ProJoint Titan is the more appropriate product.

ProJoint Titan requires a minimum joint width of 5mm and a minimum depth of 20mm.

ProJoint RapidFlow requires a minimum joint width of 3mm and a minimum depth of 20mm. It is a flow-applied product, meaning it is designed to be poured and flow into joints rather than brushed in. This suits tighter or more intricate jointing work.

Both products use a two-part epoxy system where a hardener is added to a pre-mixed base at the point of use. The key difference is in how the product is worked into the joints.

Titan is brush-applied, using a wet medium-soft brush at 45 degrees to push product into the joints. RapidFlow, as the name suggests, is designed to flow into joints with less manual working required. This can make it faster to apply on certain projects, particularly where joints are tighter or the paving layout is more complex.

Both products require the same discipline around surface preparation, temperature management and cleaning as you go. The application window after mixing is finite for both – only mix what you can use in a single session.

Choose ProJoint Titan if:

• The paving is natural stone or concrete only
• The area will carry vehicular traffic up to 10 tonnes
• Joints are 5mm wide and 20mm deep or larger

Choose ProJoint RapidFlow if:

• The paving is porcelain, or a mix of porcelain and natural stone
• You want a flow-applied product for tighter or more intricate jointing
• The resin sheen from Titan is a concern for the specific stone type being used

Both products are available on Solseal with next day delivery on selected in-stock items. For help choosing or for bulk order pricing, call the team on 01708 855 698. Shop ProJoint Titan and ProJoint RapidFlow.