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Introducing Custom Outdoor Kitchens, Engineered For One-day Installation
New Holland, PA • (717) 354-5570
New Holland, PA • (717) 354-5570
$76.00
The PHNA Xtreme Bedding Compound is a high-strength, highly plastic-modified, frost-resistant drainage mortar bedding for the laying of natural stone, slabs, tile, and concrete pavers.
30-Day Returns Guaranteed
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30-Day Returns Guaranteed
Reliable Shipping
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| Use Cases | Laying natural stone, slabs, tile, and concrete pavers |
| Application Time | Approx. 1 hour at 20°C / 68°F; faster at higher temps, slower at lower |
| Temperature Range | 5–25°C / 41–77°F; do not lay on frozen ground |
| Material Requirement | 1/8”–3/8” clean crushed aggregate |
| Aggregate per Bag | Approx. 220 lbs aggregate per 55 lb bag of bedding compound |
| Water Addition | Approx. 11 L / 2.9 gal per 25 kg / 55 lb bag; reduce for wet aggregate |
| Compressive Strength | 2900–5500 psi at 3 and 28 days (depends on filler and ratio) |
| Flexural Strength | Approx. 1015 psi |
| Ingredients | Cement per EN 197; Trass per DIN 51043; special additives |
| Storage Life | 1 year unopened in sealed, undamaged packaging; keep dry and frost‑free |
| Mixing & Coverage Method | Add aggregate + ~75% water, then Trass, then remaining water; mix 4–5 minutes to earth‑moist, slightly shiny; forms a loose ball |
| Equipment | Compulsory or gravity mixer; small batches in wheelbarrow/mortar tub possible (longer mix time) |
| Coverage | Approx. 2.5–2.7 ft³ per unit at 1:4 ratio |
| Application layer thickness | Minimum 1.5” / Maximum 4” |
Trass Bedding Mortar VDW 480 is a pre‑mixed, cement‑based, plastic‑modified mortar engineered for drainable bedding. It’s enhanced with natural “trass,” a volcanic pozzolan from Mount Vesuvius, long valued for improving water resistance and strength. The result is a durable, high‑performance bedding mortar that resists moisture, supports heavy use, and outperforms conventional mixes in longevity and stability across modern hardscape applications.


Water flows through the bedding, keeping stones dry, reducing runoff, and recharging groundwater—especially valuable in freeze–thaw climates to minimize erosion.

Frost- and de-icing salt resistant, this permeable bedding lets water pass, keeping surfaces cleaner and stones dry.

It dries fast, so you can grout in 24 hours—speeding up schedules, wrapping jobs sooner, and keeping quality high.

This Bedding System is suitable for use with under-surface heating. It is also permeable, allowing surfaces to dry and be warm without shifting or cracking.
RECOMMENDED MIXING RATIO
| Weight | 55 lbs |
|---|---|
| Dimensions | 21 × 11 × 4 in |


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.
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.