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Delivering around Essex and East London


SALE Reduced to clear
End of line colours


AltroMastic 100 is available to colour match Altro Safety Flooring and Altro Transflor products. Standard sealant gun required.

AltroMastic 100 is a specially formulated sealing compound for use where Altro floorings abutt edges, skirtings, wall surfaces etc, or where the flooring is cut around pipes, upstands door frames etc.

AltroMastic 100 is not recommended for use in trafficked areas, as a welded joint will give superior performance. Where flooring abutts drainage channels, access covers, quarry tiles etc, a clamping or welding system should be used. Please refer to Altro for detailing sheets.

AltroMastic 100 should only be used to seal joints in Altro floorings where obstructions prevent the use of a hot air welding gun.


  • Viscosity: Thixotropic

  • Density: 1.01

  • Cure Time: 24-48 hours

  • Skin Time: 20 minutes

  • Storage: Store between 5°C to 25°C in cool, dry conditions

  • Shelf Life: At least 12 months, in an airtight container, from date of manufacture

  • Coverage: Approximately 40 linear meters per 3mm bead

  • Working Temperature: Between 5°C to 40°C

  • Full Bond: 4 days

Contains: 290ml


  1. Surfaces to be sealed must be dry and free from dirt, oil or grease.

  2. All areas to be sealed should be masked with masking tape .

  3. Place tube of sealant into skeleton gun.

  4. Cut off the end of the tube nipple, fix the nozzle, and apply a bead approximately 3mm in diameter.

  5. Once opened the curing process begins, therefore, open tubes may not be reused as the mastic may have cured within the tube.

  6. Remove masking tape as soon as possible as AltroMastic 100 is formulated to be fast curing.

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