Nitoseal® PE290

• Excellent adhesion to concrete, asphalt and steel.
• No primer required in dry or damp conditions.
• Good resistance to chemicals, de-icing salts and hydrocarbons.
• Slightly flexible to accommodate limited movement.
• Fast cure at 20°C and above minimizes traffic disruption.
• Can be applied at low temperatures, cures below freezing.
• Available in black for use on asphalt and gray for use on concrete.

For sealing horizontal cable slots in concrete and asphalt pavements associated with:

• Road traffic signals and inductance loops.
• Airport runway lighting.
• Automatic barriers or gates.

Joint Preparation

• Concrete and Asphalt - After cutting the required groove, all laitance or slurry from the water lubricated saw blade must be completely blown out whilst wet using oil-free compressed air. Flush grooves with clean water prior to blowing if required. It is not necessary to completely dry the groove. Any slurry that has been allowed to dry, or powdered dust from dry cutting operations should be power wire brushed or abrasive blasted from the groove, followed by blowing with oil-free compressed air. This also applies to concrete or asphalt faces around lighting units that have been formed previously using a water lubricated diamond coring tool.
• Steel - If bare metal, the joint faces around lighting units or posts should be abrasive blasted to remove all traces of corrosion. If aluminum, alloy or coated metals are to be sealed, the surfaces should be degreased using Fosroc Solvent 102* and allowed to dry for 5 minutes before sealing. The correct width/depth profile may be achieved by the installation of a foam backing cord. Alternatively, sand may be used to encapsulate loop wire whilst acting as a bond breaker for the joint sealant. To obtain neat straight edged seals, masking tape should be applied to both edges of the joint prior to sealing, the masking tape should be removed immediately following the completion of the works.

Mixing - The three components of Nitoseal 290 are supplied in the correct proportions for mixing. Pour the entire contents of the base into a suitable mixing vessel and then slowly add the accelerator catalyst component whilst mixing with a slow speed drill (300 to 500 rpm) fitted with a Fosroc Sealant Mix- ing Paddle (MR2) then add the filler component. Thoroughly mix the components for not less than three minutes ensuring a homogeneous consistent mix.

Note: The accelerator catalyst component must be incorporated or Nitoseal 290 will not harden.

Application

• Groove Sealing - Following thorough mixing, pour the Nitoseal PE290 directly into the prepared groove using a spouted container, watering can or other suitable means. It may be practical and convenient to fill narrow grooves using a Fosroc ‘G’ gun fitted with a plastic nozzle, which if necessary can be cut to size to suit the joint width.

Cleaning - Uncured Nitoseal PE290 can be cleaned using Fosroc Solvent 102. Cured Nitoseal PE290 can only be removed by mechanical means. Any spillages of Nitoseal 290 should be absorbed immediately onto sand, sawdust or other suitable absorbent materials. Disposal should be in accordance with local regulations.

Supply

Guide to Sealant Quantities

Number of liters required = (Joint width (mm) x groove depth (mm) x groove length (m)) / 1000

Adjustment should be made where necessary for the volume of rhe cable. A further amount should be allowed for possible wastage.

• Applications should not commence if the temperature of the substrate is below 5°C.
• Service temperature range of Nitoseal PE290 is from -30°C up to + 80°C.

Shelf Life - 6 months if stored in the original unopened containers in a cool dry place at ambient temperatures below 25°C. Do not store in direct sunlight.