TrailBinder

Gravel and decomposed granite bring texture, warmth, and natural character to outdoor spaces. TrailBinder helps stabilize these materials, creating more cohesive walking surfaces while preserving the appearance of the aggregate chosen for the project.

EXPLORE PERFORMANCE ↓PRODUCT RESOURCES

PermeableWater can pass through

Zero VOCEPA Method 24

Natural finishAggregate color and texture retained

How TrailBinder stabilizes aggregate

Gravel and decomposed granite are familiar materials in gardens, parks, and public pathways, where their color and texture are often central to the design. They can also shift underfoot, wash out in concentrated runoff, and require regular attention in heavily used areas.

TrailBinder is a water-based polymer stabilizer that binds compatible aggregate particles together, helping the finished pathway hold its shape without replacing the stone with a conventional paved surface. The aggregate remains visible, and permeability remains part of the system.

✓Preserve the color and texture of the selected stone
✓Support more stable walking surfaces in high-use locations
✓Use familiar aggregate materials and installation practices

Aggregate pathway at Olympic Sculpture Park in Seattle — **Natural aggregate character**Surface performance without a paved appearance

Properties & technical details

The information below brings together application conditions, handling requirements, and published product characteristics for specification review. Consult the current manufacturer documents before finalizing installation details.

Properties

Application Requirements

Daytime temperature above 70°F
Nighttime temperature above 50°F
48 hour rain-free window required
Product must dry to begin polymerization

Storage & Handling

Product cannot freeze during handling or storage
Do not store above 120°F or below 33°F
No special handling requirements
Ships as unclassified, non-hazardous material
Stock can be retained over several seasons

Dilution

Standard dilution is 1 part PolyFirm : 5 parts clean water (by volume). In extremely hot and dry conditions, add ½ part extra water to compensate for evaporation.

Packaging

Available in 275 gallon totes with easy-open, resealable spigot and venting fittings. Free pickup recycling available. Also available in 5-gallon pails.

Technical Details

Spec sheet ↗Install Instructions (PDF) ↗Section 32 12 43 ↗

Form	White liquid, dries transparent
Applications	Landscape pathways, stable gravel surfaces, wind/water erosion control
Dilution	With water in ratios between 5:1 and 10:1, depending on application
Packaging	275 gallon totes with resealable spigot, 5-gallon pails
Storage Temperature	33°F to 120°F, cannot freeze
Application Conditions	Dry weather, temperatures above 45°F
Curing	Product must dry to begin polymerization
Appearance After Curing	Maintains original coloration of materials
Load Bearing	Higher capacity when compacted
Shear Strength	Up to 1250 psi UCP
Permeability	1.0 × 10⁻³ cm/sec minimum
VOC Content	0 g/L (EPA Method 24)
ADA Compliance	Meets ASTM F1951 requirements
HMIS Hazard Rating	1 or less (Primary Polymer Component)
Environmental Impact	Non-Toxic

Design for installation day.
And for the years after.

You choose aggregate because its color, texture, and relationship to the architecture are right for the site, not simply because it is easy to maintain. But a considered specification also anticipates the years after handover: foot traffic, runoff, repairs, and the maintenance your client can realistically manage. TrailBinder helps you preserve the material character you intended while planning for a pathway that can be maintained and renewed.

The path should still belong to the landscape after the first winter.

Natural stone is often the right visual choice, especially when a pathway should feel like part of the landscape rather than a separate paved element. Specifying it responsibly means considering how the material will behave through wet seasons, regular foot traffic, and the years after the project is handed over.

Selecting the right aggregate is only part of designing a successful pathway. Base preparation, drainage, expected traffic, and long-term maintenance all influence how the finished surface performs, and they should be considered together when specifying the system. TrailBinder is a renewable treatment, so the maintenance plan should account for inspection, localized repairs, and reapplication when conditions warrant it.

REVIEW INSTALLATION REQUIREMENTS →

01 / MATERIAL CHARACTER

Preserve the appearance you selected

The selected stone determines much of the path’s character, including its color and texture. TrailBinder can improve cohesion while allowing those qualities to remain visible.

02 / USE & ACCESS

Consider the people using the space

A more cohesive aggregate surface can be easier to navigate, particularly in frequently used areas. Accessibility still needs to be evaluated for the completed route, including its slopes, transitions, and surface conditions.

03 / SITE CONDITIONS

Integrate with the rest of the design

A binder is one component of the pathway assembly, not a substitute for good construction. The base, drainage, edging, and aggregate grading still need to work together.

04 / LONG-TERM OWNERSHIP

Keep maintenance predictable

A realistic maintenance plan includes periodic inspection and repair, with reapplication as the surface wears. That allows the owner to preserve the intended appearance without treating the first installation as the final intervention.

Natural aggregate belongs in more places.

TrailBinder can be considered wherever a project calls for the appearance of natural aggregate and a more cohesive walking surface, from residential gardens to civic pathways. Suitability depends on the selected material, expected traffic, base construction, drainage, and a representative site mockup.

Gardens & landscapes

Residential paths, garden walkways, plazas, and gathering areas where the aggregate finish is an intentional part of the landscape design.

Parks & public pathways

Circulation routes in parks and civic landscapes, where a natural-looking surface needs to accommodate everyday pedestrian use.

Trails & open spaces

Walking, cycling, and shared-use trails, provided the aggregate, substrate, and anticipated loads are appropriate for the proposed construction.

Sloped & erosion-prone surfaces

Paths on grades or in erosion-prone locations, where aggregate retention can help, but where drainage and runoff management remain essential.

Compatible crushed stone and some recycled aggregates may also be considered, although each source material and proposed use should be evaluated separately.

TrailBinder in built landscapes

Across the Pacific Northwest, TrailBinder has been used in public landscapes where designers want the visual character of natural materials, but also have to account for the demands of heavily traveled pathways.

Olympic Sculpture Park

At Olympic Sculpture Park, sloped gravel pathways connect visitors with the surrounding landscape, sculpture, and waterfront views. Their aggregate finish is part of the park’s visual character, while the route itself must accommodate regular pedestrian traffic.

Design consideration: a natural-looking finish across sloped, well-traveled routes.

EXPLORE MORE PROJECTS →

Installation and curing

Installation begins with a properly prepared base and compatible aggregate, but the application method, compaction, temperature, and available drying window also matter. Follow the current installation instructions for the actual site conditions.

STEP 01

Prepare the base

Prepare the subgrade and aggregate base, establish drainage, and confirm the intended depth and compaction before applying the binder.

STEP 02

Mix and apply

Mix the binder with clean water and apply it according to the current instructions, taking the aggregate and weather conditions into account.

STEP 03

Compact and finish

Distribute the treatment through the wearing course, then compact and finish the aggregate using the specified equipment and sequence.

STEP 04

Allow to cure

Allow the treated surface to dry and cure under suitable conditions, and keep traffic off the path until the specified reopening criteria are met.

READ INSTALLATION INSTRUCTIONS ESTIMATE APPLICATION TIME

Make the surface part of the design.

Review the product documents, estimate material quantities, and discuss the proposed aggregate, site conditions, and schedule before finalizing your project.

PLAN YOUR PROJECT