Gravel-Lok - Amber Color - 50 Gallon

Name: Gravel-Lok - Amber Color - 50 Gallon
Brand: Cell-Tek
SKU: GLK-AD
Price: 6643.41 USD
Availability: InStock

$6,643.41

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SKU GLK-AD

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Designed to keep gravel in place, Gravel-Lok binds various types of gravel together providing a strong-porous surface which can be installed in a wide variety of different applications and settings.

Gravel-Lok is a Polyurethane Based Gravel Binder.
Why it matters: Polyurethane binders perform far better long term than low-cost water based gravel binders. Additionally, due to their decreased strength, water based binders are not suitable for regular foot or vehicular traffic without frequent re-application.

Note: Please allow a 7-10 business day lead time prior to shipping for 50 gallon gravel lock drums.

NOTE: This product is ineligible for return or order cancellation once the order has been shipped.

Gravel-Lok Authentic

Frequently Asked Questions

Gravel-Lok Coverage Calculator

Find out exactly how much Gravel-Lok you need for your project

Project Area (SF)

Installation Method

Results for —

Select Thickness

Tip: minimum depth should be at least 3× your stone size (e.g. ½" stones → minimum 1.5" depth).

Gravel-Lok Mix

—

gallons needed

Roll Coat

—

gallons (90 SF/gal)

Total in Gallons

—

mix + roll coat

💡 Tips:

Stone selection: Use washed and cleaned angular stones — angular edges interlock better for durability, and clean stones ensure proper bonding.
Minimum depth: Depth should be at least 3× your stone size (e.g. ½" stones → 1.5" minimum depth).
Light-colored stones? Use Clear formula — it contains UV additives and won't discolor your stones.
Mix ratio: Do not exceed 20–24 oz of liquid per 5-gallon bucket of stones (~50 lbs). Too much liquid causes foaming.
🌡️ Temperature: Install only when temperatures will remain between 50°F and 90°F for at least 24 hours after application to ensure proper curing.
⚠️ Installing over existing concrete? Add a roll coat to the concrete and while it is wet add the mixed Gravel-Lok with gravel to help it stick to the concrete.

Coverage rates — Mix: 1" = 37.2 SF/gal · 1.5" = 24.8 SF/gal · 2" = 18.6 SF/gal · Roll coat = 90 SF/gal | Pour: 1 light pour = 19 SF/gal · 2 light pours = 14 SF/gal.

Select Your Gravel-Lok Product

Container Breakdown

Install in Six Steps

The recommended mix method, at a glance. Both formulas follow the same process. For full detail, coverage rates, and the pour method, see the complete installation guide.

Rinsing aggregate stone with a hose to wash out dust

Wash & dry stone

Clean, washed stone; fully dry before mixing.

Pouring measured binder into a bucket of stone

Measure binder

20–24 oz per 5-gal bucket of stone (~50 lb).

Mixing stone and binder with a drill paddle

Mix until coated

Blend to a thin, even film on every stone.

Rolling out geotextile fabric across the base

Install fabric

Lay geotextile over the prepared base.

Screeding coated stone level to set depth

Place & level

Screed to depth — at least 3× stone size.

Applying a roll coat over the cured surface

Cure, then roll coat

Cure 24 hrs (50–90°F), then seal the top.

Full Installation Guide Includes mix & pour methods, coverage rates, and handling tips.

Driveway application note
Gravel-Lok can be used on driveways, but the cost is typically much higher than pouring asphalt or concrete. It cannot be applied to an existing driveway surface, as additional underground support products are required, and regular re-application is often needed annually to keep the surface in good condition. See the Gravel-Lok Driveway FAQ for more information.

Choose Your Formula & Size

Both formulas install exactly the same way — the difference is appearance and recommended use. Each is available in three sizes.

Clear Formula UV-stable

LookColorless to very light yellow. Won't discolor stone.

Best onWhite, light, or any color stone where natural tone matters.

UsePathways, patios, garden paths, french drains, city tree pits, stonescaping.

TrafficSuited to higher-use pedestrian surfaces.

Amber Formula warm tone

LookWarm amber, matte finish. Will discolor light / white stone; fades over time in sun.

Best onDarker or natural stone where a warm look is desired.

UseGarden paths with minimal use, french drains, stonescaping, tree surrounds.

NoteMatte finish becomes fully visible 2–6 months after application.

Each formula ships in three container sizes — pick above based on your project area (use the coverage calculator on this page to size it):

1 Gallon · trial size 5 Gallon · standard 50 Gallon · drum

Where It's Used

Gravel-Lok bonded-stone path and patio surface

Paths & patios

Firm, permeable walking surfaces

Tree pits & surrounds

Porous, root-friendly cover

Gravel-Lok drip edge and french drain application

French drains & drip edge

Keeps drainage stone in place

Gravel-Lok stonescaping border around a garden bed

Stonescaping & borders

Beds, gardens, decorative edges

Finished Gravel-Lok municipal and commercial project

Municipal & commercial

Parks, government porous projects

Gravel-Lok bonding decorative stone in a creative application

Any decorative stone

Pea gravel, granite, river rock, glass, marble

Gravel-Lok Videos

Garden Path Installation

Important note
The mix method ratio has been updated since this video was published. It is now 20 oz. of liquid to a five-gallon bucket of stone (do not fill the bucket to the top — fill to the 5-gallon mark, a few inches from the top). Roll coat coverage is 400–500 SF per five-gallon container, or 80–100 SF per gallon.

Gravel-Lok Overview

Clear vs. Amber

Coverage & Handling at a Glance

Coverage rates (both formulas)
Method	Rate	Notes
Mix — 1"	37.2 SF / gal	Thinnest usable layer
Mix — 1.5"	24.8 SF / gal	Common path depth
Mix — 2"	18.6 SF / gal	Heavier-use surfaces
Pour — 2 light pours	14 SF / gal	Larger areas, 2.5" min
Roll coat	90 SF / gal	Top seal, applied separately

Mix ratio: do not exceed 20–24 oz of binder per 5-gallon bucket of stone (~50 lb). Install between 50–90°F for 24 hours. Depth should be at least 3× your stone size. Enter your exact square footage in the coverage calculator above for precise quantities.

Recommended Accessories

A geotextile base layer separates your aggregate from the subgrade and stabilizes the surface — the ideal foundation before you place Gravel-Lok stone (see Step 04). DuPont SF-20 is the recommended fabric.

DuPont SF-20 geotextile fabric roll, 6.25 feet by 300 feet

Geotextile Base Layer

DuPont SF-20 — 6.25' × 300'

1,875 SF per roll. Ideal separation and stabilization layer beneath a Gravel-Lok surface. Best for larger installations.

View product

DuPont SF-20 geotextile fabric roll, 4 feet by 300 feet

Geotextile Base Layer

DuPont SF-20 — 4' × 300'

1,200 SF per roll. Same separation and stabilization fabric in a narrower roll — a good fit for paths and smaller areas.

View product

Spec Sheets & Downloads

Color Comparison: Amber vs. Clear Vehicular Installation Info Safety Data Sheet — Clear Safety Data Sheet — Amber Full Installation Guide

Shipping

Free shipping · all orders

Every Gravel-Lok order ships free by standard ground.

Orders typically ship same day when placed before 12:00 noon CST.
Transit times on the map are in business days and approximate; the ship day isn't counted as a transit day.
Expedited shipping available on orders over $2,000 — call (800) 748-5647 for pricing and ship times.
Local pickup is not available.

Gravel-Lok ground shipping transit time map