GftK vdw 815+ – Grout for External Porcelain & Natural Stone Paving
Grout your porcelain or natural stone patio the fast & easy way. GftK vdw 815+ is a professional 2-part epoxy porcelain paving grout for narrow joints from 3mm wide — quickly and easily applied as a wet slurry for a clean, tough and durable finish that lasts for years.
- Ideal for porcelain & natural stone
- Apply even in the rain — no waiting for dry weather
- Non-staining and easy to keep clean
Price range: £60.68 through £62.82
GftK vdw 815+ is the professional porcelain paving grout for outdoor porcelain and fine natural stone. It suits narrow joints from 3mm.
If you’re laying or restoring a patio, the joints make or break the finish. Ordinary cement and brush-in grouts crack, stain and let weeds back through within a season or two. GftK vdw 815+ is the fix.
It’s a professional epoxy grout for porcelain slabs and fine natural stone with joints from 3mm. As a result, you get clean, tough, weed-free joints that still look good years later.
So from garden patios and pool surrounds to commercial terraces, it’s the porcelain paving grout the professionals reach for. It also works for grouting and repointing flexible paving with unbound stone setts.
Why vdw 815+ is the porcelain paving grout professionals choose
- Less time on your knees. It’s poured and squeegeed in as a self-compacting slurry, with no slow hand-pointing.
- No weather delays. Because it goes on pre-wetted slabs, you can grout in the wet — even in light rain, down to +3°C.
- Stays looking clean. It’s non-staining on porcelain and sensitive stones like sandstone. Also, you can jet-wash it as often as you like.
- Built to last. It’s tough, abrasion-resistant, and fully frost- and de-icing-salt resistant. Plus it keeps weeds out for good.
- Safer and more sustainable. The joint is smooth, uniform and durable, so it reduces trip hazards.
Where to use GftK vdw 815+
- External porcelain paving on patios, terraces and pathways
- Natural stone, including sensitive Indian sandstone and coloured limestones
- Pool surrounds, commercial and retail paved areas
- Repointing stone paving with narrow joints
- Domestic driveways and other light-to-medium-traffic areas
- Refurbishing and repointing flexible unbound stone paving to prevent weed growth
Why epoxy is the best grout for porcelain paving
Outdoor porcelain is dense and non-absorbent. So cement-based grouts struggle to bond, and they often crack or lift.
A 2-part epoxy like vdw 815+ bonds chemically instead. It also copes with temperature changes, so the joint stays put for years.
Applied as a wet slurry, it fills even tight 3mm joints completely, with no gaps for water or weeds. For wider joints from 5mm, or areas taking vehicles, use our GftK vdw 850+. You can also browse the full range on our GftK Paving Joint Mortars page.
Simple to apply — a quick how-to
First, thoroughly pre-wet the paving and keep it wet. Then mix the resin-coated sand with the hardener.
Pour it onto the wet surface. Then use a squeegee and more water to move it as a slurry into the joints, where it self-compacts.
No extra tooling is needed. Finally, rinse and brush off any excess with a fine spray and a soft coconut brush. This leaves the surfaces clean and the joints neatly finished.
Colours, sizes & fast UK delivery
GftK vdw 815+ comes in three colours: Natural, Stone Grey and Basalt. Stone Grey is the popular choice for a clean, modern finish. It’s supplied in easy-to-use 10kg units.
As the exclusive UK & ROI distributor of GftK, NCC Streetscape delivers genuine products fast across the UK. Plus, every order comes with free expert advice, training and on-site support.
What is the best grout for outdoor porcelain slabs?
The 2nd-generation, 2-part epoxy grout GftK vdw 815+ is widely regarded as the best grout for outdoor porcelain slabs. It bonds to non-absorbent porcelain; it does not shrink or crack and is fully frost and jet-washing resistant.
Can you use epoxy grout on porcelain paving?
Yes — special epoxy grouts are recommended for porcelain paving, and GftK's vdw 850+ and vdw 815+ (grade for narrower joints from 3mm wide), are unique, 2nd-generation, 2-part epoxy paving joint grouts, designed specifically for use on external porcelain tile paving. This makes vdw 815+ an ideal jointing compound for porcelain paving.
How do you grout porcelain slabs, and will it stain?
Pre-wet the slabs, mix, pour and move the vdw 815+ across the paved surfaces using wet-slurry techniques, so it self-compacts into the joints, no additional tooling required. Then simply brush and rinse-off any excess material with a fine hose spray and a soft coconut brush. The result is stain and haze-free.
Is this an exterior porcelain grout that resists frost and jet-washing?
Yes — once cured this external porcelain grout resists frost, de-icing salts and frequent jet-washing, plus it prevents weed growth.
What joint size, colours and pack size does vdw 815+ come in?
It suits narrow joints from 3mm wide and at least 20mm deep (the depth of the tile), and comes in three colours — Natural, Stone Grey and Basalt — all supplied in 10kg units.
GftK 815+ or 850+ — which porcelain grout do I need?
Choose vdw 815+ for narrow joints (>3mm), and vdw 850+ for joints (>5mm).
| Product type | 2-part epoxy resin paving joint mortar (grout) |
| Best for | Porcelain & natural stone with narrow joints |
| Minimum joint width | From 3mm |
| Minimum joint depth | Approx. 20mm (min depth of tile / stone) |
| Traffic loads | Light to medium domestic & commercial (footpaths, patios, terraces, driveways etc.) |
| Application | Wet slurry onto pre-wetted surface; above +3°C (rising) |
| Density / SG | 1.5 kg/litre |
| Colours | Natural, Stone Grey, Basalt |
| Pack size | 10kg |
| Resistant to: | Frost, de-icing salts, high-pressure jet-washing, weed growths |
How much will you need?
The interactive coverage calculator lets customers enter area, paving unit and joint sizes to estimate how many 10kg units to order, plus you can call us for any specific assistance.
Downloads
See it on real projects
- Exposed coastal paving, Perranporth — Sensitive granite paving exposed directly to the sea on this Cornish seafront, installed with GftK vdw 815+ in the joints.
- Contemporary exposed porcelain plank patios & pathways in Ayrshire, Scotland — An eclectic linear garden design where neat, durable joints were essential.
- Extensive timber-plank effect porcelain patio, Macclesfield, England — An innovative design and build project by Chaplin Builders, successfully jointed with GftK vdw 815+.
Colours
Pick the shade to suit your paving: Natural, Stone Grey or Basalt — Stone Grey is the popular choice for a clean, modern grey porcelain grout finish.
Not sure — 815+ or 850+?
Go for vdw 815+ if your joints are narrow (from 3mm+) on porcelain or natural stone. For wider joints (5mm+), or frequent / heavy vehicle traffic, choose GftK vdw 850+.
Buy from the UK's GftK specialists
NCC Streetscape is the exclusive UK & ROI Agent & Distributor of the unique GftK paving jointing solutions, so you're getting the best products backed by best expertise. Every enquiry and order comes with free technical advice to help you choose the right grout and get the best result — plus training and on-site support when you need it. This is why professional contractors and DIY owners buy their paving grouts directly from us.
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GftK vdw 850+ – Epoxy Jointing Grout for Natural Stone & Porcelain Paving
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