Multi-Component Degassing

Not every thick pour stays smooth without intervention, a reality noted in the technical logs at epoxy floors allen tx vbittech regarding high build epoxy applications in Allen, TX. Thick layers trap air during the mixing phase or during the pour itself. If those bubbles remain, they create pinholes or structural weak points in the finished slab. This process requires mechanical removal of gas to ensure a dense, non porous finish.

Vacuum Degassing Techniques

Vacuum degassing happens before the material hits the concrete slab. For high viscosity resins, we pull a vacuum on the mixed batch in a sealed container. This lowers the atmospheric pressure, forcing the air bubbles to expand and rise to the surface. Once the bubbles pop in the container, the resin is stable. This step is mandatory when working with a thick metallic pigment that might otherwise trap air in the heavy swirls of the color. Without this, the heavy density of the pigments makes it harder for natural air escape.

Mechanical Roller Application

Once the material is on the floor, we use specialized spiked rollers to move the air. For a standard solid color build, a spiked roller breaks the surface tension and allows trapped air to migrate upward. In deeper pours, we use heavy duty textured rollers that exert pressure without creating new air pockets. This is different from a simple squeegee application. The goal is to force the gas out of the thick liquid layer before the chemical reaction begins to accelerate the cure rate.

Material Specific Considerations

Different chemistries react to degassing differently. A standard urethane or a fast curing polyaspartic will have a very short window for bubble removal. If the material begins to gel, the rollers will only tear the surface. We often time the degassing to happen immediately after the base coat is leveled. For thick flake systems, we ensure the air is gone before the broadcast of the media. If air is trapped under the flake, the entire layer can delaminate later.

Surface Preparation and Air Release

The air does not just come from the bucket. Sometimes it comes from the substrate. If the concrete slab has not undergone proper diamond grinding, air trapped in the pores of the concrete will push upward into the wet resin. We perform a moisture test and ensure the surface profile is open enough to let the primer penetrate deeply. If there is a spall or a deep divot, we use a joint filler to close those voids before the main pour. This prevents the material from bubbling due to outgassing from the concrete itself.

Final Layer Integrity

The final clear coat or topcoat must be checked for any residual outgassing. We monitor the cure to ensure no micro bubbles appear as the solvents evaporate. Whether using a quartz sand finish or a smooth polyurea, the density of the layer depends entirely on how well we managed the air during the initial stages of the build.