GFTK Xtreme Ceramic VDW 815-Outdoor Grouting Binder, 22 lbs

$97.80

GFTK Xtreme Ceramic VDW 815 Grouting Binder is a water-permeable, self-compacting grout for porcelain flagstones and slabs. It is suitable for light to medium traffic and can be applied in wet or cool conditions.

Traffic: Light–medium loads
Use: Flags/slabs; ideal for ceramic/porcelain tiles
Performance: Water‑permeable; self‑compacting; no resin film; no whitening
Durability: Highly abrasion‑resistant; mechanical sweeper‑resistant
Application: Works on damp paving, in light rain, and low temps; surface > 37ºF

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gftk-xtreme-easy-colors: Natural

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SKU: GFTK815EXCERBAS Categories: Joint Mortars, Mixes Brand: GFTK

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Product Specs

Product Type	2‑component epoxy paving joint compound for narrow joints (ceramic tile)
Water Permeability	approx. 0.1 gal/min/sq ft at 10% joint fraction
Application Time	Approx. 30 minutes at 20°C / 68°F (hardens faster when warmer, slower when colder)
Application Temperature	2–26°C / 37–80°F (do not apply on frozen ground)
Compressive Strength	19.6 N/mm² / 2843 psi
Flexural Strength	8.8 N/mm² / 1276 psi
Dry Density	Set mortar density: 1.6 g/cm³
Minimum Joint Width	1/8 in (3 mm) or larger
Recommended Joint Depth	20 mm / 0.79 in in bonded bedding; 30 mm / 1.18 in in non‑bonded bedding
Traffic Rating	For light traffic loads
Surface	Clean, stain‑free finish; pressure washer friendly
Weather Tolerance	Can be applied in rain, low temperatures; no need to protect from rain during application
Storage Life	2 years unopened in sealed, undamaged packaging; keep dry, frost‑free; store ≤20°C / 68°F

Benefits Of GFTK Ceramic Outdoor Grout

Strength And Durability

Epoxy mortar delivers a robust bond that resists cracking, staining, and damage, enduring heavy traffic, moisture, UV, and chemicals—ideal for long‑lasting outdoor tile.

Sustainability

Eco-friendly epoxy outdoor mortar uses low-impact materials and contains no harmful chemicals, solvents, or VOCs.

Low Water Absorption

Epoxy mortar’s low water absorption protects outdoor tiles from moisture, preventing mold and damage and extending lifespan.

Easy to clean and maintain

Epoxy mortar resists dirt and stains, cleans easily, and keeps high‑traffic outdoor tiles looking fresh for years.

Application Guide

Here is a complete guide for everything you need to know about applying your epoxy mortar. We understand that installing tile can seem like a complicated process, but if you have any questions, don’t hesitate to contact us, and we will be glad to help.

Downloadable Guide

Site Preparation

Ensure a stable, load‑bearing base with a water‑permeable sub‑base sized for traffic loads. VDW grouting suits small to large formats, but not substructure settlement, sealing, or waterproofing. 815 Grouting Binder can be applied on damp surfaces, in high humidity, and even in rain. Clean the paving thoroughly, clear joints to the required depth, pre‑wet the surface, and mask areas not being jointed.

Mixing The Epoxy Mortar

Pre-mix the resin-coated aggregate materials (Component A) of VDW 815 in a clean pail.
Add the liquid hardener (Component B) from the bottle to the pail and mix with a drill and spherical paddle mixers until smooth.
Mix for at least 3-5 minutes.
Caution: Do not use a material that isn’t thoroughly mixed, and do not add water during the process.

Filling The Joints

Immediately pour mixed VDW 815 onto the pre‑wetted surface and squeegee into joints. If it hardens too fast, lightly spray with water. Keep the area constantly wet. Do not mix partial units or use unmixed material.

Brushing Off

After 5 minutes, remove excess VDW 815 with a damp coconut fiber brush. Lightly spray the joints without washing out material, then clean the paved surface in the areas to be joined. Do not let residue‑laden water stand, dry, or run over finished sections. Finish by rinsing and brushing off any remaining residue with water and a coconut brush.

Important Information

Avoid walking on freshly applied areas for at least 24 hours or until the paving surface is no longer tacky. A very thin layer of resin binder may remain on rough surfaces that are not thoroughly cleaned, but it will disappear over time as it is exposed to the elements.

Weight	22 lbs
Dimensions	10 × 10 × 11 in
gftk-xtreme-easy-colors	Basalt, Natural, Stone Grey

Concrete Mixes FAQs

One-part resin sands handle pedestrian areas and narrow joints. Two-part epoxy mortars are built for medium to heavy vehicular traffic, driveways, and wide joints. Concrete additives boost standard bagged concrete for custom paver edging, while trass bedding mortars and bonding slurries create stable, permeable bases for heavy stone or porcelain.

Most resin and epoxy joint compounds can be installed on damp paving and during light rain. Bedding mortars, bonding slurries, and concrete edging mixes need dry weather during application to set correctly.

Higher temperatures speed up curing and shorten your working window to about 30 minutes, so work quickly and clean surface residue off immediately. Cooler temperatures slow curing down. Do not apply mixes on frozen ground or when surface temperatures fall below 37°F.

Self-compacting joint mortars flow into voids naturally when worked across the surface with water and a squeegee. This eliminates air pockets and builds a tight bond without needing mechanical compaction equipment.

Keep the paving surface wet during application, clean off excess material within 5 minutes, and rinse thoroughly. Sweep away remaining fine particles with a damp coconut fiber brush without pooling water. Any slight residual film will weather away naturally under UV light and foot traffic.

Permeable bedding lets water drain freely to the sub-base, preventing standing water, efflorescence, and freeze-thaw damage beneath natural stone, pavers, or tile.

Most joint mortars and bedding systems accept foot traffic after 24 hours. Wait 3 to 7 days for full curing before opening the area to heavy vehicular traffic.

Adding an admixture package to dry, standard bagged concrete introduces synthetic fibers, shrink control, and waterproofing. This increases flexural strength by over 700%, helps seal micro-cracks, and prevents edge breakdown along driveways and walkways.

Apply a bonding slurry to the back of porcelain, natural stone, or pavers before placing them into a fresh mortar bed. This wet-to-wet application creates a high-strength monolithic bond that keeps tiles and pavers from popping loose under heavy loads.

Use clean, washed aggregate between 1/16 in and 1 in in diameter, including glass chippings. Stones can be slightly damp, but dirty, dusty, or soaked aggregate will prevent proper epoxy bonding and weaken the final surface.

Begin Your Project journey at our showroom

Visit our 5,000 square feet indoor hardscape materials showroom in New Holland, PA where you will find hardscape layouts, outdoor kitchen ideas, patio paver designs, patio lighting features, and our high-quality patio furniture all on display. Find the colors and textures that best complement your style, and a guide to help you choose the best combinations for your hardscape project in New Holland, PA. Here you will find hundreds of hardscape materials on display along with a full display of backyard and patio ideas.

GFTK Xtreme Ceramic VDW 815-Outdoor Grouting Binder, 22 lbs

GFTK Consumption Calculator

Product Specs