Views: 0 Author: Site Editor Publish Time: 2025-11-19 Origin: Site
Our core product, chemical building additive RDP/VAE powder, can be supplied by Shijiazhuang Qingquan Cellulose Co., Ltd. with higher quality products and can also be customized to different viscosities according to your needs. Shijiazhuang Qingquan Cellulose Co., Ltd. is a cellulose manufacturer from China.
Although both interface agents and interface mortars belong to the category of "base treatment materials," they differ significantly in their use and performance.
Simply put, they can be understood as follows: Interface agents are more like "glue," primarily functioning to enhance adhesion and seal the substrate.
Interface mortars are more like "glue coatings with a rough texture," not only enhancing adhesion but also leveling and increasing the roughness of the substrate.
Below, we will compare them in detail from several aspects:
| Comparison Projects | interface agent | Interface mortar |
| Main forms | Liquid (milky white, transparent, or slightly yellow adhesive) | Powder (gray or off-white dry powder, needs to be mixed with water on site) |
| core ingredients | Polymer emulsions (such as ethylene-vinyl acetate copolymer), additives, etc. | Cement, quartz sand, polymer powder, Redispersible latex powder, etc. |
| Main function | 1. Penetration and Sealing: Penetrates into the substrate, reducing water absorption and preventing "slurry burning". 2. Enhanced Adhesion: Acts as an intermediate bridge, improving the adhesion between subsequent materials and the substrate. 3. Curing and Dust Removal: Cures loose particles in the substrate,preventing sandblasting. | 1. Enhanced adhesion: Strongly bonds different materials. 2. Increased roughness: Forms a high-strength, rough interface on a smooth substrate surface. 3. Leveling effect: With a certain thickness, it can compensate for minor unevenness. 4. Water and freeze-thaw resistant: Superior performance. |
| Construction Appearance | After application, a transparent or semi-transparent film is formed, revealing the original appearance of the substrate. | After application, a 1-3mm thick rough cement-based coating is formed, completely covering the substrate. |
| Applicable to grassroots | Substrates with high water absorption or a certain strength, such as concrete, aerated blocks, gypsum board, and putty layers. | After application, a 1-3mm thick rough cement-based coating is formed, completely covering the substrate. |
| Typical application scenarios | Before applying putty to the wall Treatment of walls with high water absorption before tiling Sealing before applying self-leveling cement | In external wall insulation systems, bonding mortar/plastering mortar is firmly connected to the insulation board. This is used for plastering or tiling on smooth concrete surfaces. It serves as a substrate for laying heavy materials such as large ceramic tiles. |
In-depth Analysis and Selection Recommendations
1. Interface Agent: A Refined "Mediator" and "Sealer"
The core advantage of an interface agent lies in its permeability. Like a "liquid bandage," it penetrates into the substrate, binding loose particles together to form a strong, unified whole. Simultaneously, it forms a film on the surface with excellent adhesion.
When to Use an Interface Agent?
When you find that the wall absorbs water quickly, or when it crumbles (dusties) when touched, you must use an interface agent for sealing and curing.
When renovating old walls (such as old paint or putty layers), using an interface agent can enhance the bonding between new and old materials, preventing hollowing and peeling.
It is easy to apply; simply roll it on and it adds almost no thickness to the wall.
2. Interface Mortar: A Powerful "Connector" and "Texturizer"
The core advantage of interface mortar lies in its physical strength and roughness. Containing cement and sand, after drying, it acts like a miniature concrete layer with high strength. Its sand-like composition creates a rough surface, greatly increasing the contact area for subsequent materials and generating strong "adhesive force."
When to use interface mortar?
When the substrate is too smooth (such as a wall surface after demolding of cast-in-place concrete), ordinary materials are difficult to adhere to. Interface mortar must be used to "roughen" the surface, creating a highly rough interface.
When bonding two different materials (such as a concrete wall and polystyrene board), interface mortar acts as a transition layer, effectively harmonizing their different physical properties.
In exterior wall insulation systems and the installation of large stone or ceramic tiles, where safety requirements are extremely high, interface mortar with even stronger adhesion must be used.
Summary
Fundamental Difference: Interface agents primarily work through chemical penetration and film formation, requiring delicate application; interface mortar, on the other hand, mainly works through physical embedding and mechanical bonding, requiring more physical effort.
Selection Guidelines:
For treating sandy surfaces, sealing porous walls, and before interior plastering -> prioritize interface agents.
For treating smooth concrete, exterior wall insulation, and bonding heavy materials -> prioritize interface mortar.
