Answer: For a permanent solution, many parameters has to be taken care of. The first step would be to evaluate what is actually causing the efflorescence. Efflorescence is caused from moisture and can happen in several ways. Improper wall ventilation, no weep vents, flashing issues, parapet caps, cracks in the mortar joints, walls exposed to the elements with no sealer, etc. Can cause problems. Addressing the above issues in combination with the use of torginol efflo-clean and torga masonry waterproofer would provide the desired results.