Water-Based vs Solvent Poly

Both have a place on the job. Here is when water-based polyurethane is the right call and when solvent still makes sense.

Water-based polyurethane

Water-based poly has become the default for most residential and commercial floor sanding work in Australia. The reasons are straightforward:

• Non-yellowing. Water-based finishes stay clear over time. On lighter timbers like Tasmanian oak, blackbutt, and American oak, the floor looks the same in five years as it did the week it was coated.
• Low VOC. Occupants can return sooner. No solvent fumes lingering for days. Meets current workplace health standards without respirator-grade ventilation.
• Fast cure. Bona Traffic GO allows furniture back in 12 hours. Even standard products like Bona Mega give a walk-on time of 3-4 hours between coats.
• Durability. Two-component water-based products like Bona Traffic HD and Wave 2K match or exceed solvent polyurethane in abrasion resistance.

The Bona system covers primers (Prime Intense for high-tannin species, Classic UX for general use), stains (DriFast), and maintenance products -- all water-based, all compatible with each other.

Solvent polyurethane

Solvent-based polyurethane is not obsolete. It has specific advantages that keep it in the toolkit:

• Amber warmth. Solvent poly adds a warm amber tone to timber. On species like jarrah, spotted gum, and Tasmanian oak, some clients specifically want that golden glow. Water-based does not replicate it.
• Forgiving application. Solvent poly has a longer open time. On large open-plan floors, that extra working time means fewer lap marks and roller lines. Less experienced applicators find it more forgiving.
• Cork floors. Cork responds poorly to rapid moisture changes. Solvent polyurethane does not swell cork cells the way water-based coatings can. For cork, solvent remains the safer choice.
• Heritage and restoration. When matching an existing solvent finish on a heritage floor, recoating with solvent maintains colour consistency across old and new sections.

Handley Urethane is a reliable Australian-made solvent polyurethane stocked by Sand-Aid. It is available in gloss, satin, and matt finishes for residential and commercial floors.

Where to source each

• Sand-Aid (Toronto NSW): Full Bona water-based range plus Handley Urethane solvent. Both systems from one supplier.
• Emporium Floor Sanding Supplies (Bennett's Green NSW): Stocks Handley Urethane and Synteko solvent products. Does not stock Bona. A good option for contractors committed to solvent-only work in the Newcastle area.
• TSFA (online): National catalogue with multiple brands including Polycure and various solvent options.

When to use which

Use water-based (Bona) when:

• The client wants a clear, non-yellowing finish
• Fast turnaround is required (same-day or next-day occupancy)
• The species is high-tannin (blackbutt, tallowwood, spotted gum) -- prime with Prime Intense
• VOC restrictions apply (schools, hospitals, aged care, occupied buildings)
• Commercial durability is needed (Traffic HD or Wave 2K)

Use solvent (Handley Urethane) when:

• The client wants amber warmth on the timber
• The floor is cork
• Matching an existing solvent finish on a heritage or partial-sand job
• The applicator prefers the longer open time for large open areas

Looking for an alternative to Emporium Floor Sanding Supplies?

Emporium Floor Sanding Supplies in Bennett's Green stocks Handley and Synteko but does not carry the Bona water-based range. If the job calls for both water-based and solvent products, Sand-Aid supplies both from a single order -- Bona full range plus Handley Urethane, delivered across the Newcastle region and beyond.