The most common waterproofing failure in Malaysia is not the original installation, it is the repair. A sealant applied to the surface of an active leak, without identifying where the water is actually entering, will fail within one or two monsoon seasons. The water finds a new path. The stain returns. The cycle repeats.
RumahPro's approach to leakage repair starts with diagnosis, finding where the water is actually entering, not just where it is appearing. The repair is only specified after we understand the source.