Yes. You can use abrasives with less than 1% free silica for abrasive blasting. This is in align with international practices.

If there is presence of low content of crystalline silica in the abrasive, you must:

• Comply with the respective requirements under WSH (General Provisions) Regulations and WSH (Medical Examinations) Regulations for hygiene monitoring and medical examination for workers exposed to crystalline silica.
• Put in control measures to ensure that workers carrying out such work will not be exposed to levels exceeding the permissible exposure limit.

This information is sourced from MOM