SANDLOCK is a proprietary, nontoxic, organic joint sand additive for flexible and semi-rigid pavement systems using segmental paver. SANDLOCK stabilizer binds joint sand swept into the joints of interlocking concrete and clay brick pavers or stone sets. A natural “glue” is formed when SANDLOCK is activated with water binding it and the sand particles. SANDLOCK prevents sand loss due to wind, traffic, moisture or thermal movement. A SANDLOCK pavement will have reduced weed growth from wind blown germination and is effective against ants. SANDLOCK remains flexible and will accommodate thermal movement. It will not ship out or break apart from wear, loosened material is instantly recaptured with any moisture. SANDLOCK does not dilute like water based chemical sealers. SANDLOCK is environmentally safe and contains NO harmful chemicals. It is safe for use around plants, animals and people. It works in all climatic conditions. SANDLOCK will not break down from ultraviolet light. It is non staining, nontoxic and does not alter the paver’s original color and beauty. No surface coating is left behind after proper application.

SANDLOCK will save you money over premixed binders and saves time over chemical joint stabilizers. SANDLOCK is mixed with joint sand on the job site. Compaction and stabilization are both done at once. No harsh chemical cleaners are needed prior to application. Install pavers, mix 1½-2 pounds of SANDLOCK for every 100 pounds of joint sand, sweep, compact, and when all joint material is swept clean from the paver surface, activate SANDLOCK by flooding with water; then, allow to set. NO additional clean up is required.

1. 1.1  Scope of Work
   1. Work included in this section, joint stabilization.
2. 1.2  System Description
   1. Modular paver systems with aggregate/sand filled joints with organic SANDLOCK binder additive.
3. 1.3  Submittals
   1. Sand: 1lb. sample with sieve analysis from aggregate supplier.
   2. SANDLOCK: 1lb. sample with manufacturer's MSDS information
4. 1.4  Tests
   1. Perform gradation test of aggregates to be used in accordance with ASTM C-136 method for sieve analysis for fine and coarse materials.
5. 1.5  Environmental Conditions
   1. Do not use SANDLOCK during rainy conditions.
   2. Ground moisture or dew can cause material to emulsify.
   3. Do not store SANDLOCK or mixed materials on any surface without protection.
6. 1.6  Safety and Handling
   1. Warning: Will cause damage to asphalt. Avoid mixing, staging or any contact with asphalt. When using bituminous set pavers and SANDLOCK, it is important that no SANDLOCK contaminates the asphalt or adhesive before the pavers are set. Using SANDLOCK additive with the sand for the joints on a bituminous set job has caused no problems to date. Always use common sense and call 952-226-6400 or check our website at www.pavetech.com for latest in installation techniques.
   2. Always wear dust masks while mixing and spreading SANDLOCK.
   3. Treat dust as you would grain dust.
   4. Will wash off skin and tools with warm water and scrubbing.

1. 1.2  Joint sand properties and gradation should conform to ASTM C-136 using gradation specifications from either C-33 or C-144 or combination of both. Sand will not contain shale, stone dust, screening or lightweight aggregates.

1. 2.2  SANDLOCK Binder
   1. Proprietary, non-toxic, organic binder that is a colorless and odorless powder that binds aggregates together to produce a firm paver joint and or surface.
   2. COMPOSITION - SANDLOCK is an all-natural ecological product. It is a nontoxic powder that is odorless and does not change the appearance of the sand. It is not harmful to plants, animals, or humans. SANDLOCK is easy to use and is suitable for all climates.
   3. COVERAGE - Approximately 1 1/2 to 2 pounds of SANDLOCK is used per 100 pounds of sand needed for jointing. Coverage will vary with the size and shape of the paver as well as the width of the joints

1. 3.1  Blending SANDLOCK with Sand
   1. Uniformly blend 1 1/2 to 2 lb. of SANDLOCK per 100 lb. of dry joint sand material. On site mixing ratio may be adjusted to between 1 1/2 to 2 1/2 lb. per 100 lb. of sand.
   2. Blending can be accomplished either by hand mixing or dry mixing in a mechanical mixer on site, or material can be pre-mixed in proper proportions and delivered to the work site. Mix only enough material to completely fill the joints of the pavers which have been set that day. Once mixed, material must remain completely dry prior to application; proper precaution should be taken to protect materials from excessive moisture exposure prior to use. While SANDLOCK can be added to damp sand, it should not be used with sand that is wet. Be sure to cover sand piles at the end of every work day or if rain is expected.
2. 3.2  Blending SANDLOCK with Open Graded Aggregates
   1. Using SANDLOCK with open graded aggregates is slightly different than when dealing with sand.
      Mixing ratio is reduced relative to particle size. Recommended sample mix ratio is 1/4 to 1/2 lb.
      SANDLOCK to 100 lb. of aggregate. The larger the aggregate, the LESS SANDLOCK is used.
      On site adjustment of the mixing ratio is recommended as no two aggregates sources are the same. Typical aggregate size used for open jointed pavements such as PAVE TECH's ENVIROPAVE, would be a processed (crushed) 3/8" clear material.
3. 3.3  Placement of Mixed Joint Material
   1. Spread mixed joint sand material over paved surface evenly; completely cover paver surface with thin layer of mixed aggregate and SANDLOCK. Using a push broom, sweep the mixture into the joints with a slight pounding motion.
   2. Once a substantial area of the pavement has been swept, run a plate compactor over the pavers in overlapping passes. Brush more of the sand mixture into the joints and compact the same area again.
      Continue this procedure until all the joints are full and sand can no longer be vibrated into them.
4. 3.4  Activation of Bonding
   1. Carefully sweep entire pavement clean to remove SANDLOCK mixture from the paver surfaces.
      Excess sand materials including chamfered areas must be swept off paved surface and removed. Power brooms or blowers are recommended for large areas. Excess material remaining on surface after the mixture has been activated is difficult to remove.
   2. The paved area, including joints, should be flooded with water to activate the SANDLOCK additive.
      Care must be taken to avoid washing sand from the joints. DO NOT USE HIGH PRESSURE SPRAY FOR FLOODING SURFACE. After flooding, area should be dry, including joints, prior to permitting traffic to use paved areas. Drying typically occurs within 2 to 6 hours, depending upon weather conditions.
5. 3.5  Cleanup
   1. If SANDLOCK is left on surface, it may emulsify. Depending on severity, it may come off with water and brushing; if severe, it may require pressure washing. NEVER LEAVE DRY SANDLOCK RESIDUE ON SURFACE!