“Great job. Nice guys, good price — all sorted on time with no drama.”
Oliver Nutt
Google review
Five star — Google reviews
Stone cleaning · Stone sealing · Concrete restoration
Stone, concrete and masonry — cleaned, sealed and restored across Queenstown & Wanaka.Stone, concrete and masonry.
Cleaned, sealed and restored
across Queenstown & Wanaka.
Specialist stone cleaning and sealing, concrete restoration, masonry protection and anti-graffiti coatings across the Southern Lakes — using NZ-made eco-friendly products built for the climate.
Schist & Ōamaru stone·Brick & block·Concrete sealing·Concrete stain removal·Efflorescence
Selected work
Trusted on Queenstown's landmark builds.
The Mill
Concrete clean & seal — Queenstown
McKenzie & Willis
Storefront water blasting — Queenstown
ROKI Collection
Schist masonry clean & seal — Queenstown
Heritage façades, hotel exteriors, premium residential, large-scale commercial. The job changes — the standard doesn't.
View all projects
Schist masonry — ROKI Collection, Queenstown
Stone specialists
We work with the stone that defines the Southern Lakes.
- Ōamaru stoneSoft, breathable limestone needing specialist care to prevent decay.
- SchistCentral Otago's defining stone — feature walls, façades, paving.
- Brick & blockClay brick, concrete block, retaining and boundary walls — cleaned and sealed.
- Natural stone tileTravertine, limestone, slate, paver tile — pool decks, patios and indoor floors.
What we do
Stone, concrete and masonry — cleaned, restored and sealed.
- 01
Stone cleaning
Schist, Ōamaru stone, natural stone tile
Restore the natural colour and texture of weathered stone walls, façades, paving and tiled surfaces — without damaging the substrate.
01Stone cleaning
Schist, Ōamaru stone, natural stone tile
Restore the natural colour and texture of weathered stone walls, façades, paving and tiled surfaces — without damaging the substrate.
02Stone sealing
Long-lasting stone protection
Breathable, water-repellent sealers that protect schist, Ōamaru stone, brick, block and natural stone tile from moisture, salt and staining.
02Stone sealing
Long-lasting stone protection
Breathable, water-repellent sealers that protect schist, Ōamaru stone, brick, block and natural stone tile from moisture, salt and staining.
03Concrete sealing
Driveway & paving protection
Seal driveways, paving and exposed aggregate against Central Otago's frost, UV and salt. Prevents cracks and staining.
03Concrete sealing
Driveway & paving protection
Seal driveways, paving and exposed aggregate against Central Otago's frost, UV and salt. Prevents cracks and staining.
04Concrete stain removal
Oil, rust, tannin & weathering stains
Lift stubborn stains from driveways, paving and commercial concrete — oil, rust, tannin and weathering marks that water blasting alone won't shift.
04Concrete stain removal
Oil, rust, tannin & weathering stains
Lift stubborn stains from driveways, paving and commercial concrete — oil, rust, tannin and weathering marks that water blasting alone won't shift.
05Water blasting & house washing
Exterior cleaning that doesn't strip paint
Soft wash and high-pressure cleaning for buildings, paths, decks and driveways across Queenstown and Wanaka.
05Water blasting & house washing
Exterior cleaning that doesn't strip paint
Soft wash and high-pressure cleaning for buildings, paths, decks and driveways across Queenstown and Wanaka.
06Efflorescence removal
White staining, salt deposits, timescale advice
Remove the chalky white deposits that appear on brick and concrete — and treat the moisture cause underneath so they don't return.
06Efflorescence removal
White staining, salt deposits, timescale advice
Remove the chalky white deposits that appear on brick and concrete — and treat the moisture cause underneath so they don't return.
07Graffiti removal & coatings
Rapid response, no surface damage
Same-week graffiti removal plus sacrificial and permanent anti-graffiti coatings that make future tags wipe off.
07Graffiti removal & coatings
Rapid response, no surface damage
Same-week graffiti removal plus sacrificial and permanent anti-graffiti coatings that make future tags wipe off.
08Waterproofing
Decks, balconies, retaining walls
Liquid-applied waterproofing systems for decks, balconies and below-ground masonry — stops leaks and frost damage.
08Waterproofing
Decks, balconies, retaining walls
Liquid-applied waterproofing systems for decks, balconies and below-ground masonry — stops leaks and frost damage.
09Acid washing
Surface prep before sealing
Carefully balanced acid wash to open the pore structure of concrete and stone before sealing — for a stronger bond.
09Acid washing
Surface prep before sealing
Carefully balanced acid wash to open the pore structure of concrete and stone before sealing — for a stronger bond.
Where we work
Servicing Queenstown, Wanaka & the Southern Lakes.
Based in Queenstown, in Wanaka every week. Whether you're on the lakefront in Wanaka, in Hāwea or Albert Town, in Arrowtown or anywhere in between, we service the whole region — same standard, no surprise travel fees.
Request a site visit
Liam Turner — founder, RTS Construction Chemicals
About RTS
Built for the Southern Lakes climate.
We're Queenstown-based, and we make our own NZ-formulated products — Water Repel, Paving Protect, Colour Enhancer and Surface Reviver — built for the frost, alpine UV and salt that destroy imported sealers.
5★
Google rated
NZ-made
Eco-friendly
Local
Queenstown
Client words
We don't market loudly. We let the work speak.
“Definitely would recommend using these guys. Great service from Liam, 10/10.”
Rumour Giles
Google review
“Very efficient service and excellent results.”
Callum McKenna
Google review
Common questions
The things people usually ask first.
Do you offer free quotes or assessments?
Yes — free, no-obligation quotes for any of our cleaning, sealing or coating work. We can give you an estimate from photos or a description, but for the most accurate pricing we'll come on-site to look at the surface properly.
Do you work in Wanaka as well as Queenstown?
Yes. We're based in Queenstown but service Wanaka, Hāwea, Cromwell, Arrowtown and the rest of Central Otago weekly. Travel is built into the quote — no surprise fees.
How long do your sealers last on schist and Ōamaru stone?
Our penetrating sealers typically last 5–10 years on stone, depending on exposure and traffic. Heritage walls in sheltered positions can go longer; driveways and paving exposed to vehicles need refreshing sooner.
Are your products eco-friendly?
Yes — our NZ-formulated product range (Water Repel, Paving Protect, Colour Enhancer and Surface Reviver) is low-VOC, non-toxic and breathable, suitable for use near native bush and waterways.
Can you remove white staining on bricks or stone?
Yes. That's efflorescence — salts being drawn through the masonry by moisture. We treat the staining and address the moisture cause so it doesn't return.
Do you do anti-graffiti coatings?
Yes — both sacrificial coatings (single-use, easy wash-off) and permanent coatings (multi-removal). We can advise which suits your building and location.
Get in touch
Tell us about your project.
Free quotes, no obligation. We'll usually come back to you within one working day — same-day if it's urgent.
Where we work
Queenstown · Wanaka · Arrowtown · Cromwell · Frankton · Hāwea · all of Central Otago