Here are some things to consider when working with Gravel-Lok:

Read SDS and follow all safety instructions including use of proper eye, skin, and respiratory protection.

It is highly recommended you make test samples before starting any job to see the effect of the liquid on the stones. Properly grade subgrade to allow water to flow away from any structures. Add drainage if necessary. Install moisture barrier if project meets a foundation with a basement. Geotextile fabric must separate aggregates from subgrade and soils on all sides of the project.

All aggregates must be very clean and free from any fine particles or dirt. The cleaner the stone, the stronger the bond.

Store Gravel-Lok at 68 degrees or above until ready to use. Do not install if rain is expected within 12 hours. Do not cover with plastic. This will trap in moisture and cause premature curing. Install when outdoor temperature is 50 degrees or above and will not drop below 50 for at least 12 hours. Allow 24 hours to cure. Rope off treated area to protect it from people and animals.

In most cases, mixing 20 oz. – 24 oz. of liquid with a 5 gallon bucket of stones is ideal.

Important: a plastic 5 gallon bucket is considered ‘full’ when the contents are filled 2” below the top of the bucket.  Do not completely fill the bucket to the top with stones.

Coverage Rates for 20 oz. liquid : 5 gallon bucket of stones

(based on using ¼”, 3/8”, and ½” size stone)
At 1” thick:  186 sf / 5 gallon container (37.2 sf / gallon)
At 1.5” thick:  140 sf / 5 gallon container (28 sf / gallon)
At 2.0” thick:  93 sf /5 gallon container (18.6 sf / gallon)

Coverage Rates for 24 oz. liquid : 5 gallon bucket of stones
At 1” thick: 144 sf / 5 gallon container (28.8 sf / gallon)
At 1.5” thick:  108 sf / 5 gallon container (21.6 sf / gallon)
At 2.0” thick: 72 sf / 5 gallon container (14.4 sf / gallon)

Finishing Roll Coat (highly recommended)
24 hours after initial installation use the same Gravel-Lok liquid and a medium nap foam paint roller to apply a finishing roll coat. This important step replenishes any liquid that has dripped down through the system due to gravity during the curing process.
Coverage rate:  400-500 sf per five gallon container (18-20 sf per gallon).


A variety of materials may be used. The aggregates should be washed of dirt, fine particles, etc and needs to be dry before applying Gravel-Lok. The base coUrse should be 3/4” angular blue stone (also known as #57 stone) at a minimum of 2 ½” thick. The decorative layer stone should range in any size from 1/4” to 3” angular or round stones. Angular stones have more contact points than round stones. In using angular stone instead of round, you can achieve a stronger load capacity on driving surfaces. Round stones tend to be smoother on the feet, however both stones are adequate. It is highly recommended you do a test area before starting any job and wait one hour to see results before proceeding. Gravel-Lok may have difficulty adhering to limestone based aggregates over the long term.


Some loose stones may occur depending on the type of stone used and degree of abuse. A disturbed area can be treated with more Gravel-Lok as needed.

The key to any pavement surface is the foundation it is built on. Cell-Tek’s Geo-cellular confinement system constrains open graded aggregates which are used for porous surface applications and increases load support. The passive resistance of the infilled cells prevents lateral movement and distributes the load over a wider area. The system also reduces the impact on the subgrade up to 28% while reducing the amount of base material required. Using LSG-3 with a 3” cell depth is the equivalent to having 12"-14” of unconfined base.

Edging material may be wood, masonry, metal or plastic. Excavated soil can also be used but care should be taken to obtain the full thickness and avoid the creation of feathered edges.


• Use caution with snow plowing equipment (gouging can occur)
• Salt resistant
• Expansion joints (saw cut) should be applied in climates experiencing frequent freeze-thaw cycles (approx. every 20 ft.)

As with any permeable surface system, the system may become clogged over time. There are vacuum systems becoming increasingly popular which are designed specifically for porous surfaces. Recommended cleaning depends on site conditions and the amount of sediments the system is exposed to. Typical permeable systems become completely clogged within 5-7 years.

Gravel-Lok may have a wet look appearance at first. This will weather over time (3-4 months) and restore the stone to more of a matte finish.



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