United Kingdom

United Kingdom


AltroMastic 100 technical data sheet


Last edited: November 2019


Cure Time:
Skin Time:

Shelf Life:


Working Temperature:
Full Bond:

24-48 hours
20 minutes
Store between 5°C to 25°C in cool,
dry conditions
At least 12 months, in an airtight
container, from date of manufacture
Approximately 40 linear meters per
3mm bead
Between 5°C to 40°C
4 days

Instructions for use

  1. 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.
  2. 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.
  3. AltroMastic 100 should only be used to seal joints in Altro floorings where obstructions prevent the use of a hot air welding gun.


  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 the masking tape supplied.
  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.

Health and safety advice

Before using this adhesive, users should refer to the SDS (Safety Data Sheet) for correct safety advice and to determine the level of PPE (Personal Protective Equipment) and RPE (Respiratory Protective Equipment) that is required.
A COSHH (Control of Substances Hazardous to Health) assessment and risk assessment should be carried out before using this adhesive.

In the case of contact with eyes or skin, rinse immediately with plenty of water and seek medical advice.
For further information see SDS available from Altro

Product for professional use

Although the technical details and recommendations contained in this product datasheet correspond to the best of our knowledge and experience, all the above information must be taken as merely indicative and subject to confirmation after long-term practical application: for this reason, anyone who intends to use the product must ensure beforehand that it is suitable for the envisaged application: in every case, the user alone is fully responsible for any consequences deriving from the use of the product.


For further information or technical advice
call our Customer Care Centre on 01426 489516
or email: enquiries@altro.com

NOTE: “Altro Ltd” (“Altro”) endeavours to ensure that advice and information given in Product Data Sheets, Method Statements and Material Safety Data Sheets (all known as Product Literature) is accurate and correct. However, where Altro has no control over the selection of its products for particular applications, it is important that any prospective customer, user or specifier, satisfies him / herself that the product is suitable for the intended application. In this process, due regard should be taken of the nature and composition of the background / base and the ambient conditions both at the time of laying / applying / installing / curing of the material and when the completed work is to be brought into use.

However, as site conditions and the execution of the work are beyond our control, we accept no resultant liability.

Altro’s policy is one of continuous research and development and we reserve the right to update our products and information at any time without prior notice.