Installation Instructions

Security Measures
Using barricades, cones or other means, block off work area to pedestrian and vehicle traffic during installation process. Have work crew be prepared to offer alternate accessible pathway to disabled pedestrians during time work is being performed and adhesive is curing.

General Conditions

• Air temperature 60 degrees F and rising
• Surface temperature 60 degrees and rising
• Surface must be completely dry with no precipitation during the 24 hours prior to installation.
• Surface must be clean and free of all foreign or contaminating agents such as foreign oils, grease, silt, loose aggregate, sand particles, curing compounds, sealants and other forms of dirt and soil. Be certain that automatic sprinklers or other sources of water will not be turned on during the installation and curing process.

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Materials Required

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Universal Application Rules

• All new concrete must have a full 21-day cure
• Always use butt joints when placing sections end to end. Never overlap mats onto each other.
• Do not apply on deteriorating surfaces or marked surfaces.
• During winter, early spring and late fall in some areas the weather conditions may not be appropriate for the installation of detectable warning mats.

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Portland Cement Applications
Assure all general conditions are favorable. Clean surface as outlined above. All curing compounds must be removed with sandblasting, grinding, wire brushing or other acceptable methods that assure complete curing compound removal. Follow by blowing surface with high-pressure air or thorough sweeping. All contaminating and foreign materials must be removed. Patch any holes or cracks larger than 1/8”.

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Mat Placement
Place the mats in the desired location. If mats need to be cut or shaped, make necessary cuts with a saw or knife and fit each mat into place. Once all mats are in position, apply a 2” wide strip of duct tape around the entire outer perimeter. Leave a 1/8” space between the tape and the edge of the mats. Be very careful that tape does not overlap onto the mats, as this will leave an area without glue when the mats are installed. Remove mats and set-aside during adhesive application.

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Adhesive Application
DWS 1017 One-Part Apply adhesive to the entire area inside the taped
perimeter using a 3/32” notched trowel (approx. 10 mil thickness).
Be certain that the area has 100% coverage and that all edges and
corners have adequate coverage of the ground adhesive. The adhesive
sets in about 2 hours (see directions on container) do not allow adhesive to dry. Each gallon of adhesive should cover approximately 50-60 square feet.
Scotchweld 3549 Two-Part. Mix equal amounts of Part A and Part B of the ground adhesive in an oversize container. Mix thoroughly following the manufacturers directions on the containers.
Follow directions as above. Adhesive sets in about 30 minutes. Each quart set should cover 25-30 square feet. Use of too much adhesive may cause bubbles and extend curing times.

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Mat Installation
Place mats one at a time in their pre-laid positions. Take care to position them tight against each other and use the tape edge as your guide. Press firmly from the center to the outer edges to remove any air bubbles that may have formed. Press on the areas between the domes in order to remove all air that may have accumulated under the mats. When joining mats together, spot tack the edges together as tightly as possible using drops of seam sealer, or use duct tape to temporarily hold the seams together. When mats are in position, carefully remove the tape from the perimeter. Press down the edges and corners of each mat firmly.

Once mats are in place, cover with ¼” plywood or similar material and weight with several sand bags weighing approximately 25# each. Allow weight to remain for several hours to insure compete bonding of the adhesive.

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Edge & Seam Sealer
Apply a small bead of Edge & Seam Seal Adhesive along all joint seams. (Do not allow adhesive to get on your hands, as it is quick acting and will glue your fingers together). See Manufacturers information on the bottle.

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Anchor Installation
After the mats have been completely installed and the ground adhesive has set, nylon anchors can be installed. Using a 1/4” masonry bit, drill holes through the mats and at least 1” into the concrete. Place 1/4” x 1” nylon anchors in the holes and tap them in with a hammer. Do not place anchors in the domes. See layout below for recommended anchor placement. Place one anchor at each location indicated by the dark spot.

Notice: Use only adhesive, edge seal, seam seal and anchors provided with your DWS Detectable Warning Mats. It is not recommended to install mats on asphalt or uncured concrete.

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