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Isoseal Mastic

Isoseal Mastic Rubberised Bitumen Mastic sealant

Isoseal mastic  is a solvent based bitumen sealant contaning rubber .It has an excellent adhesion to all kind of concrete surfaces .It is blended with fibers to make leak free when applied on vertical areas. It is sutable for the termination of waterproofing systems,filling gap and joints,


  • Single component, cold applied and ready to use
  • Eco friendly
  • Excellent Adhesion to most building substrates
  • Compatible with all bituminous Water based products
  • Damp proofing of most substrates.
  • Vapor proof barrier coating for interior & exterior joints.


Technical Specification

Properties Data Value
Chemical Base  Rubberised Bitumen 
Color Black
Density   1.2
Solid Content Approximately 80 % by weight
Resistance to chemicals chlorides and sulphate
Application Temp 4-48 deg C
Surface Dry (Hrs) 24 hours depending upon temperature and humidity
Complete dry 7 to 10days 
Form  Paste


Surface Preparation

The substrate must be clean, dry and free of all contamination such as dirt, oil, grease, coatings etc which hinder an adhesion. The substrate must be sound and of sufficient strength. There should not be any standing water and should be a cured surface. 

Substrate Preparation / Priming

It is recommended to use a prime coat to ensure proper bonding of subsequent coat. The prime coat can be prepared at the site by diluting isoTexa BPCoat with 20% water and applying this diluted coat as the primer. The primer penetrates concrete surfaces, fill pores, hairline cracks etc and produces an excellent surface for adhesion of isoTexa BP Coat. Further coats shall be applied only after the primer coat dries off completely.

Application Method


  • Apply masking tape to both sides of the joints for getting a neat finish.
  • Mix the contents of the pail with a paddle mixer for a few minutes prior to the application .
  • Application should start from the botton to top of the joint 
  • It can be applied trowel or scraper

Health & Safety

  • Store away from sunlight, UV and other sources of light
  • Shelf life is 12 months if stored as per recommendation
  • Avoid contact with eyes and prolonged contact with skin.
  • For eyes flush immediately with water for 15 minutes and call a physician.
  • Protective clothing such as gloves and goggles should be worn when handling the product.
  • Keep containers tightly closed when not in use.

Conditions of Use and Disclaimer The information contained in this Material Data Sheet is given in good faith based upon our current knowledge and does not imply warranty, expressed or implied. The information is provided and the product is sold on the basis that the product is used for its intended purpose and is used in a proper workmanlike manner in accordance with the instructions of the Product Data Sheet in suitable and safe working conditions. Under no circumstances will the Company be liable for loss, consequential or otherwise, arising from the use of the product.