Bituthene® Mastic

Trowel applied bituminous mastic for use with GCP waterproofing membranes

Product Description

Bituthene® Mastic is a cold applied one part solvent based rubberized bituminous mastic.

Bituthene Mastic has been designed to complement the range of Bituthene waterproofing systems and assists with the application as a detailing aid.


  • Seals Bituthene® membranes when terminated in concrete chases.
  • Seals edges of patches.
  • Seal edges of overlaps in detail areas.


Do not use below +4°C. Surfaces shall be dry, flat, free of sharp protusions and hollows. Use a stiff brush and airline to remove dust and all contaminants. Use a trowel or spatula to scoop mastic from can and apply firmly into joints and corners, compacting mastic well to avoid air entrainment. Bituthene Mastic remains soft for several months.


For detailing under head pressure use Bituthene LM.

Product Advantages

  • No mixing necessary
  • Simple application – trowel applied directly to substrate or membrane
  • Flexible
  • Chemical resistant
Supply/Key Data  
Bituthene Mastic 20 Liter can, 36 Cans/Pallet
Weight 21 Kg/Can
Storage Keep in sealed containers away from sources of ignition
Equipment by others Trowel or Spatula

* Depending upon method of application, surface protrusions, detailing requirement, etc.

Health and Safety

Read the product can and Safety Data Sheet (SDS) before use. Users must comply with all risk and safety phrases. | Thailand customer service: 66 2 030 9700

This document is only current as of the last updated date stated below and is valid only for use in Thailand. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2021-02-05