Answer:
| Type of ingredients | Flexible cement | Scope of application |
| A. Liquid waterproof | (1) The coating-type material does not have construction-related joint problems. (2) It is easy to construct on complex terrain with high and low slopes, irregular shapes, and areas such as the angle between pipes and air outlets. (3) The two-fluid type material is easy to work with after thorough mixing and costs are low. (4) It is safe to be installed at room temperature. (5) Colored materials can be used for exposed types while also having the function of aesthetics. (6) Applicable areas: roofs, courtyards, terraces, and flower beds, etc. | (1) If the main agent and curing agent are not mixed uniformly, the curing process will not be complete and the waterproof layer will be easily failed. (2) Paint-based waterproofing materials have poor quality and thickness on site, making it difficult to control. (3) Natural flow exhibition: the unevenness of the surface ground makes it difficult to control the thickness. (4) When immersed in water for a long time, it is prone to swelling due to hydrolysis (the PU in the tar series is less affected). (5) More suitable for exposed roof or indoor waterproofing applications; if additional layers such as PC pressure impregnation or cement mortar are required, the PU must be of the resorcinol series. (6) The requirement for the dryness of the substrate is strict. |
| B. Acrylic rubber waterproof material | (1) The single-fluid construction method does not cause uneven mixing. (2) The coating-type material has no overlapping seams and can be installed at room temperature, making it easy to install on complex terrain. (3) It can be adjusted to various colors. Therefore, it can also have the effect of enhancing aesthetics. Applying it on the exterior wall should be the best choice. (4) Compared with A and C waterproof materials, it has better resistance to ultraviolet radiation or weather resistance. | (1) The flatness of the bare ground is very strict. (2) The construction is complete; it is not advisable to apply a covering layer such as cement mortar on it. (3) The waterproof layer prevents prolonged immersion in water to avoid re-foaming. (4) It is water-soluble, so it is easily washed away when it rains after the construction is completed. (5) The quality of the main agent and additives varies greatly, making on-site quality control difficult. |
| C.RA glue (Emulsified bitumen-based waterproofing material) | (1) Single-fluid type without the phenomenon of uneven mixing. (2) It has the advantages of water-proof coating without overlapping seams, construction at room temperature, and easy construction on complex substrates, etc. (3) The price is cheaper; the thickness can be chosen to be thicker. | (1) The types of emulsifiers or additives vary. (2) After the waterproofing layer is applied during construction, if the interior is not completely dry, the surface layer must be laid on top of it; otherwise, the waterproofing layer will be hydrolyzed. (3) In Japan, it is rarely used for roof or larger-scale ground water drainage projects; the reliability of its waterproof function is lower. |