Can I paint or wallpaper directly on it?

Yes. After it is fully dry, the smooth finish is ready for paint, wallpaper or other decorative coatings without an extra skim coat.

How much water should be added?

Approximate dry powder to water ratio is 100 : 50-60 by weight. Add powder to clean water, mix lump-free, slake 3-5 minutes, remix and use within its open time (~30-40 min).

What are the advantages over cement mortar?

It is about 40 % lighter, reduces wall load, is easier to trowel, sets faster, regulates indoor humidity and is A-class fireproof - while cement mortar is heavier, slower and prone to hollowing/cracking.

What is the packaging and shelf life?

Standard 25 KG/BAG (to be confirmed with COA). Store dry and ventilated on pallets, keep away from moisture; shelf life is about 6 months in original unopened packaging (gypsum hardens if damp).

Is it fire-resistant and eco-friendly?

Yes. Gypsum is an inherently A-class inorganic, non-combustible material with no harmful emissions, making it safe for residential and commercial interiors.

Eco Friendly Lightweight Gypsum Plaster for Interior Wall Coating

Name: Eco Friendly Lightweight Gypsum Plaster for Interior Wall Coating
Brand: Shanghai Languan New Building Materials Co., Ltd
SKU: 2004074491

Shanghai, ChinaShanghai Languan New Building Materials Co., Ltd

US$4.00

200 Bags

Sample price:US$0.00/bag.Request sample

Product profile

Customization

Available

Application

Commercial Construction, Infrastructure Projects, Residential Construction

Color

White

Model NO.

Setting Time

Normal-Setting

Special Additives

Water-Resistant Modifier

Type

Lightweight Gypsum Plaster

Thickness

5-50 mm

Dry Density

~800-1000 Kg/M3

Output

Spray 800-1000 M3/Day

Fire Resistance

Class a

Transport Package

Bag

Specification

25kg/bag

Trademark

Lan Guan

Origin

China

Key features

Lightweight & High Yield: About 50% lighter than cement mortar, one bag covers more area, cutting transport and handling cost.

2-3 times Faster Application: Spray-applied up to 800-1000 m2/day vs 30-40 m2 by hand with cement - schedule cut by half.

No Hollowing or Cracking: Gypsum naturally bonds and "breathes", eliminating the hollowing and cracking common to cement mortar.

A-Class Fireproof: Inherently non-combustible gypsum core, safe for high-rise residential fire-code compliance.

Humidity Regulating: Gypsum absorbs and releases moisture to balance indoor humidity for healthier living.

Eco-Friendly Neutral pH: Cement-free, low VOC, neutral pH - safe for indoor air quality and occupants.

Excellent Adhesion: Strong bond to concrete, AAC blocks and brick walls; no primer needed on most substrates.

Thermal & Sound Insulation: Lightweight porous structure adds insulation value to the wall system.

Smooth Finish Ready: Single coat 5-50 mm with a fine surface, minimal sanding before paint or wallpaper.

Water-Resistant Modified: Added water-resistant modifier for humid zones (kitchen/bathroom dry areas); use Q3 for basements.

Company profile

High Repeat Buyers ChoiceFast DeliveryFull CustomizationQuality Assurance

Shanghai Languan New Building Materials Co., Ltd

Shanghai, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤2.49h

AI-Powered supplier vetting

SummaryShanghai Languan New Building Materials Co., Ltd. is described as a developer, manufacturer, and seller of environmentally friendly building decoration materials. Its stated scope covers building materials, floor-related solutions, machinery and equipment, hardware, chemical products, communication equipment, and import/export and technical services. The supplier reports OEM service for well-known brands, quality assurance, documented complaint-handling and corrective-action procedures, and facilities including mixing, self-leveling, and automatic packaging lines. However, it has no available SDK, no stated AI-based decision-management practice, no inventory capability, no overseas warehouse or showroom, and no valid manufacturing-capacity contract with affiliated subcontractors. Financial information is limited to years identified as 2021–2023 without performance values. Certification, customer cases, and detailed customization evidence are not sufficiently documented.

Supplier typeThe supplier is presented as Shanghai Languan New Building Materials Co., Ltd., focused on R&D, production, and sales of environmentally friendly building decoration materials. Its business scope includes building materials, insulation materials, sealing fillers, cement products, machinery, hardware, chemical products, and related sales and import/export activities, supporting classification as a building-material manufacturer and supplier.

After-Sales capabilityThe supplier reports clear procedures and records for corrective and preventive actions and customer complaint handling, and describes providing technical guidance and comprehensive customer services. However, it lacks overseas warehouse and showroom capabilities, so the evidence supports structured service handling but not broad overseas after-sales infrastructure.

R&D capabilityThe company describes R&D activity and the ability to develop new materials using existing technology, and its culture emphasizes innovation. However, it explicitly has no available SDK and has not established an AI model for big-data decision support; these limitations prevent a broad conclusion that its innovation capability exceeds requirements.

Production capacityThe supplier states that it conducts production and lists processing and manufacturing activities, with a mixing line, self-leveling production line, and automatic packaging robot. Quality assurance and documented corrective-action procedures are also reported, although there is no valid contract with affiliated subcontractors and no in-stock capability.

Customization capabilityThe supplier reports OEM services for well-known brands and says it provides solutions for difficult floors, technical guidance, and development of various new materials using existing technology. This directly supports some customization and OEM capability, although the slices do not specify product scope, minimum quantities, lead times, or engineering resources.

Product Q&A

Q:What is this lightweight gypsum plaster used for?

It is an interior wall and ceiling plaster made from high-purity hemihydrate gypsum with selected lightweight aggregates and eco-friendly additives. It is the modern, eco-friendly replacement for traditional cement mortar.

Q:What is the recommended application thickness?

Single-coat thickness is 5-50 mm. For thicker or uneven substrates, apply in layers and let each layer set before the next.

Q:Does the wall need a primer before plastering?

Porous substrates can be plastered directly; dense or shiny surfaces such as concrete should receive a bonding primer first for reliable adhesion.

Q:Can it be used in wet areas like bathrooms or kitchens?

No. It is for dry interior walls and ceilings only. For wet zones or high humidity, use a dedicated waterproofing system (e.g. our flexible waterproofing) or a water-resistant mortar.

Q:How long does it take to set and dry?

Initial set is about 60 minutes and final set about 3-4 hours. Drying to paint-ready depends on layer thickness, ventilation and humidity, typically a few days.