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Flexlock Ultra Sand

For concrete paving stones & natural stones, for joints up to 2" (5 cm)

TRADITIONAL APPLICATIONS
setting time: 1 hour above 32°F (0°C)

OVERLAY APPLICATIONS
Setting time: 24 hours above 32°F (0°C)

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IMPORTANT INSTALLATION NOTES

  1. Always refer to the latest FLEXLOCK ULTRA SAND Technical Data Sheet (TDS) at Flex-lock.com before installing FLEXLOCK ULTRA SAND.
  2. Pavers and slabs must be installed according to ICPI Tech Spec #2 traditional application (www.icpi.org) before FLEXLOCK ULTRA SAND installation. For Overlays ICPI recommends 2″ (5 cm) diameter drainage holes spaced approximately 10 ft (3 m) apart and at the lowest elevations in the slab. Holes should be filled with #8 stone and covered with a 1 foot x 1 foot (30 cm x 30 cm) patch of Gator Fabric GF4.4. Drilled holes should allow any water entering the bedding layer to freely flow out.
  3. Pavers’ sides and top surfaces must be completely dry. Do not apply if the paver surface is damp or wet. The damp or wet surface will cause FLEXLOCK ULTRA SAND to prematurely activate and will lead to the polymers sticking on the paver surface.
  4. Do not apply if the paver joints are damp or wet. This will prevent the FLEXLOCK ULTRA SAND from properly sliding into the joints and obtaining very densely packed joints, which is critical to the products performance.
  5. Temperature must be above 32°F (0°C) with dry conditions (no rain for at least 1 hour) after installing FLEXLOCK ULTRA SAND in a traditional application and (no rain for at least 24 hours) in overlay application.
  6. For all paver surfaces, and particularly around in-ground pools there must be a slope of 1/8 inch (3 mm) per linear foot away from the edge of the pool, or structures to ensure optimal performance of the FLEXLOCK ULTRA SAND.
  7. For the pool coping units it is mandatory to use mortar in the joints. For the rest of the paver installation around the pool, you can use FLEXLOCK ULTRA SAND.
  8. Do not sweep FLEXLOCK ULTRA SAND over asphalt.
  9. FLEXLOCK ULTRA SAND level, must be at least 1/8 inch (3 mm) below top of paver’s surface or 1/8 inch (3 mm) below the chamfer or erosion may occur. The filled and cured polymeric sand joints should never be in direct contact with foot traffic or tires.
  10. For textured or pre-finished surfaces, we recommend to remove all the sand from the paver or slab surface prior to using the plate or roller compactor.

PLEASE NOTE:

All pavers must be completely interlocked for vehicular and pedestrian use. If pavers are fanned they are not considered interlocked. FLEXLOCK ULTRA SAND can be applied when pavers are installed directly on open graded aggregates that lock or choke themselves. This means the polymeric sand will not migrate through the voids. Do not apply FLEXLOCK ULTRA SAND when the pavers are installed directly on aggregates with large voids.

CROSS-SECTIONS REPRESENTS THE HEIGHT OF POLYMERIC SAND FOUND IN THE JOINTS

Maximum joint width for overlays: 2″ (5 cm)

POLYMERIC SAND REQUIREMENTS

Minimum joint width: 1/8″ (3 mm)
Maximum joint width: 2″ (5 cm)
Maximum overlay joint width: 2″ (5 cm)
Minimum joint depth: 1 1/2″ (38 mm)

REQUIRED SUB-SURFACE PREPARATION AND FOUNDATION OPTIONS

FLEXLOCK ULTRA SAND is recommended for a variety of uses including pool decks, patios, footpaths, driveways, parking spaces, pavements etc. The concrete pavers must be installed on a traditional base system composed of 2 layers. The upper layer can have a maximum of 1 inch (25 mm) of bedding sand ASTM No.9 stone. The lower layer must have a minimum of 6 inches (15 cm) of crushed stone compacted at 98 % Proctor density. (See diagrams below).

FOR OVERLAY APPLICATIONS

  1. Remove all loose and fragile concrete.
  2. Cover bottom and side of the excavated area with a Gator Fabric GF4.4, refill with crushed stone and compact it.
C-33 sand or ASTM No. 9 stone can be used under pavers.

Installation Instructions

(For a new paver surface)

STEPS 1 & 2

Spread FLEXLOCK ULTRA SAND with hard-bristle broom. Make sure the FLEXLOCK ULTRA SAND completely fills the joints. Do not use other materials in the joints. Leave a layer of FLEXLOCK ULTRA SAND on the surface to aid in vibrating and consolidating FLEXLOCK ULTRA SAND into joints. For textured or pre-finished surfaces, we recommend to remove all the sand from the paver or slab surface prior to using the plate or roller compactor.

STEPS 3 & 4

Vibrate the FLEXLOCK ULTRA SAND into the paver joints using a vibratory plate compactor. A rubber pad is recommended. A roller compactor is best for slab installation. Joints sand level, must be at least 1/8″ (3 mm) below top of paver’s surface or 1/8″ (3 mm) below the chamfer. It is best to compact in several directions to ensure there are no air gaps or voids in the joints. Repeat steps 1-3 to ensure joints are filled and consolidated. Narrow joints require more care to completely fill.

STEP 5

Sweep off excess FLEXLOCK ULTRA SAND from the paved surface, first with a hard-bristle broom, then a soft bristle broom. Joints sand level, must be at least 1/8″ (3 mm) below top of paver’s surface or 1/8″ (3 mm) below the chamfer.

STEP 6

Use a leaf blower to remove all remaining FLEXLOCK ULTRA SAND residue from the paver surface.

IMPORTANT WATER ACTIVATION NOTES

  1. Work in manageable sections, ideally about 100 sq. ft. (10 sq. m.) at a time, depending on temperature.
  2. Do not allow FLEXLOCK ULTRA SAND to wash out of joint.
  3. Never allow paved surface to dry out during the water activation phase.
  4. Watering must be started at the lowest point of the paved surface.
  5. Use a watering gun connected to a hose. Setting should be set to shower.

STEP 7

Shower water on a specific water area of 100 sq.ft. (10 sq. m.), wait no longer than 2 to 3 minutes. Proceed to STEP 8.

STEP 8

Shower and rinse simultaneously on the same section of approximately 100 sq. ft. (10 sq. m.) so as to eliminate any FLEXLOCK ULTRA SAND residue left on the pavers. Any FLEXLOCK ULTRA SAND residue should go directly into the paver joints. Wait no longer than 2 to 3 minutes. Proceed to STEP 9.

STEP 9

Shower and rinse simultaneously, so as to eliminate any FLEXLOCK ULTRA SAND residue left on the same section. Any residue should go directly into the paver joints. However, stop showering when you see water retention on the paver joints. Wait no longer than 2 to 3 minutes. Proceed to STEP 10. Note: Repeat the directions of STEPS 7 to 9 for all other areas that have not been showered with water.

STEP 10

Use a leaf blower to remove any excess water remaining on the paver pores and crevices. This blowing action is necessary to help remove any remaining FLEXLOCK ULTRA SAND residue left on paver surfaces from the previous steps.

IMPORTANT

The water used in steps 7 to 9 will activate a bonding action as well as condensing FLEXLOCK ULTRA SAND in the joints. It is important to water the FLEXLOCK ULTRA SAND a total of 3 times, as per steps 7, 8 and 9. Too little water will not properly activate the FLEXLOCK ULTRA SAND and will reduce the final performance. If steps 7 to 10 are not done properly, a white haze may appear on paver surface after installation. This is due to excess FLEXLOCK ULTRA SAND residue left on paver surfaces. This haze will dissipate over time, or it could be removed by using Gator Clean Efflorescence Cleaner.

Please note that this limited warranty applies only when the product is used for residential purposes exclusively (home owners or contractors using the product for single or multi-unit dwellings that are exclusively for residential use). The manufacturer cannot guarantee results as it has no control over surface and sub-surface preparation and product application. (Proper installation of pavers or slabs to ensure long-term stability of work, including granular foundation of certified crushed stone of 0-3/4 inch (0-20 mm) (minimum of 6 inches / 15 cm), bedding sand layer (maximum of 1 inch / 25 mm) and appropriate installation of reinforced edging in accordance with above specified method for applying product.) Also warranted when used with Gator Base. However, for a period of 15 years from purchase, the manufacturer agrees that if the product is proven to be defective, and on the condition that it was installed pursuant to the method of application of surface and sub-surface preparation described above, then the manufacturer agrees to refund the purchase price. Proof of purchase is required for any claim.

THE PARTIES AGREE THAT REFUND OF THE PURCHASE PRICE AS STATED IS THE ONLY OBLIGATION OF THE MANUFACTURER. IN ALL EVENTS, THE MANUFACTURER SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES OR COSTS WHATSOEVER, (INCLUDING REMOVAL OR REINSTALLATION OF SAND OR PAVERS) DIRECT OR CONSEQUENTIAL. TO THE EXTENT PERMITTED BY LAW, THE MANUFACTURER EXCLUDES ANY IMPLIED WARRANTY OF QUALITY, MERCHANTABILITY OR FITNESS FOR PURPOSE. ALLIANCE DESIGNER PRODUCTS INC. excludes any responsibility whatsoever for the presence of moss, mold, mildew, or similar factors that may occur on the product after its installation. The presence of moss, mold or mildew is caused by the particular on-site conditions, including excess moisture, shade, absence of ventilation, inadequate cleaning or maintenance, presence of soil or other organic debris left on the product after installation. ALLIANCE DESIGNER PRODUCTS INC. excludes any responsibility for use of FLEXLOCK ULTRA for any installation not installed to manufacturer’s specifications and ICPI Tech Spec #2.

Please note that when the product is used for other purposes (Mixed-use, commercial, institutional or other), the above terms apply except that the applicable period is reduced to 1 year from purchase. ALLIANCE DESIGNER PRODUCTS INC. excludes any responsibility for use of any Gator Polymeric Sand for any installation not installed to manufacturer’s specifications and ICPI Tech Spec #2.

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