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Gypsum Plaster
Gypsum Plaster
Gypsum plaster is a pre-mixed finishing material used almost exclusively on interior walls and ceilings. It is based on gypsum, a mineral that sets quickly and provides a very smooth, white finish ideal for decoration.
Plaster create an exceptionally smooth, level, and aesthetically pleasing surface on interior substrate, ready for painting or wallpapering.
Key Characteristics:
· Fast Setting & Drying: Allows for much quicker project completion compared to cement-based materials.
· Smooth Finish: Naturally provides a high-quality, crack-resistant surface that is ideal for top-tier paint finishes.
· Not Water-Resistant: Standard gypsum plaster is unsuitable for damp or wet areas unless specifically formulated with moisture-resistant additives.
FUQING BIOT's product portfolio offers advanced solutions for the gypsum plaster industry as well. Our additives help achieve superior workability and performance.
What's our Product Effect?
1. Cellulose Ether (HPMC/MHEC)
FUQING’s cellulose ether is a water-soluble polymer additive that acts as a performance regulator for gypsum plaster. Its core roles include:
· Water retention: Prevents the rapid evaporation of water from gypsum plaster.
· Thickening & workability: Increases the viscosity, making plaster easier to spread, shape, and apply evenly. It also reduces sliding down.
2. RDP Powder (Redispersible Polymer Powder)
FUQING’s RDP powder is a polymer-based additive that re-disperses into a film when mixed with water, acting as a "flexibility and strength booster" for cement render and plaster. Its main functions are:
· Flexibility improvement: Reduces the brittleness of cement-based materials. It minimizes cracks from drywall settling.
· Bonding strength enhancement: Strengthens the adhesion between the plaster and substrates, as well as between coating layers (e.g., base coat and finish coat).
Frequently Asked Questions
What is the ideal consistency for gypsum plaster for easy application?
The ideal consistency is a smooth, creamy paste, typically achieved with a water-to-plaster ratio of about 0.6-0.7. Caution! Avoid over-watering, as excess water significantly weakens the final strength, increases shrinkage, and leads to cracking. The consistency should be adjusted carefully by adding small amounts of water if needed, while mixing thoroughly to maintain a uniform and workable paste.
What is the setting time for gypsum plaster, and how can it be controlled?
The setting time for gypsum plaster is typically 20-30 minutes for initial set and 60-90 minutes for final set. It can be controlled by adding retarders (e.g., citric acid) to extend the time or accelerators (e.g., potassium sulfate) to shorten it, depending on application needs.
Can RDP be used in gypsum plaster, and what benefits does it provide?
Yes, RDP can be added to gypsum plaster to improve adhesion, flexibility, and impact resistance. It reduces the risk of cracking and enhances durability, especially in high-movement areas.
How can I improve the surface finish of gypsum plaster?
A superior finish can be achieved by using fine-grade gypsum, additives like HPMC for workability, and proper troweling techniques. Sanding between coats and ensuring a dust-free environment also contribute to a smooth surface.
As a gypsum plaster manufacturer, why source additives from FUQING BIOT?
FUQING BIOT’s specialized additives for gypsum plaster optimize setting time, improve mechanical strength, and reduce water absorption. They prevent plaster from cracking or sagging, ensure uniform drying, and enhance workability for construction teams. With our additives, your gypsum plaster will meet high-quality standards, boosting customer satisfaction and market competitiveness.
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