Fosroc Nitoseal SC800 Sealant 600ml

Product Description

Nitoseal SC800 is a one-part, gun applied, silicone rubber joint sealant designed to effectively seal joints in concrete roads, runways, carparks and pavements. The low modulus characteristics of Nitoseal SC800 allow it to accommodate cyclic joint movements of plus 100% and minus 50%. Nitoseal SC800 is designed to be applied to joints between concrete pavements in order to prevent running water from undermining the pavement. Nitoseal SC800 also serves to prevent stones from being deposited in the joints which would otherwise lock. the joints and restrict the free thermal movement of adjacent pavement segments.

Previously known as Emer-Seal Roadseal.

Features:

• Ready to use
• Easy contractor application
• No mixing required
• Fast rate of cure
• Excellent adhesion to clean dry concrete
• Excellent weathering - UV and ozone resistant
• Dispensed from a bulk container by hand or air powered pump
• Large joint movement accommodation

Ideal for:

• Concrete roads & pavements
• Bridge decks and car parks
• Aircraft runways and aprons

APPLICATION

Joint Preparation:

All concrete to which Nitoseal SC800 is to be applied must be a minimum of 14 days old. All joint surfaces must be clean, dry and free from any concrete slurry, oil, dirt or loose material, form release or curing compounds. Saw cut joints must be thoroughly cleaned of all concrete slurry by a high pressure water wash, followed by drying with high pressure compressed air. After air blasting the surface water away, the joints must be allowed to dry normally for an additional 16 hours. Where atmospheric conditions are not conducive to good drying e.g. low temperatures, high humidity or rain; Primer 10 or Primer 13 should be used.

Where previously sealed joints are to be re-sealed, mechanically remove all of the existing sealant prior to saw cutting the joint. Care should be taken not to melt residual asphaltic sealant and spread it onto the joint faces with the hot saw blade.

Before application of the Nitoseal SC800 remove any wind blown debris from the joints with a blast of dry, oil free, compressed air.

An approved closed cell polyethylene backer rod or bond breaker tape must be installed into the joint before sealant application. When placing the backer rod allow for a 5 mm set down of the sealant from the pavement surface.

Priming is not normally required provided the joint faces are clean and free from any trace of laitance and surface contamination. Refer to the TDS for more information.

Placement:

Nitoseal SC800 is applied from 600 ml sausages into the joints using a suitable sealant gun. On larger projects, an air assisted gun and pump may be used allowing faster application. Within 10 minutes after application, the sealant must be tooled in order to improve contact with the joint faces, and to lower the sealant surface to a level about 5 mm below the pavement surface. Tooling is essential to force the sealant to make good contact with the joint faces and achieve good adhesion.

Clean Up:

Equipment may be cleaned of uncured sealant by wiping, or soaking and wiping with Fosroc Solvent 10. Any sealant allowed to cure becomes very difficult to remove and can only be removed using Fosroc Solvent 10 in combination with steel wool.

Storage:

Storage life of 24 months in original containers when kept in cool, dry conditions.

Yield:

Each 20 litre drum will seal approximately 200 metres of joint with a 10 mm wide by 10 mm deep sealant bead.