Landu Novastar HPS is a precision‑engineered additive for gypsum plastering — delivering outstanding workability, exceptional whiteness retention, and long‑lasting crack resistance across interior wall applications worldwide.
Gypsum plaster has become the preferred option for modern interior walls and ceilings due to its smooth finish, faster application, and superior fire resistance compared to cement‑based plaster. The performance of a gypsum system depends on how well its additives balance workability, water retention, and surface finish.
How Landu Novastar™ HPS Enhances Your Plaster
Landu Novastar™ HPS
Hydroxypropyl Starch Ether — Powder Form for Gypsum Plaster Systems
with Landu Novastar™ HPS Additives — formulated for traditional trowel application, valuing workability, open time and surface fineness.
30–60 min
with Landu Novastar™ HPS Additives — fine finishing formulations for ultra‑smooth surfaces ready for paint or wallpaper application.
1–3 mm
with Landu Novastar™ HPS Additives — engineered for mechanized construction, delivering precise rheology, pumpability and consistent spray coverage.
with Landu Novastar™ HPS Additives — incorporating perlite or vermiculite to reduce weight and enhance thermal efficiency without sacrificing workability.
with Landu Novastar™ Hydroxypropyl Starch Ether (HPS) — suited for heavy‑duty and long‑life finishes where strength and impact resistance are key.
with Landu Novastar™ Hydroxypropyl Starch Ether (HPS) — for artistic and architectural finishes requiring plasticity, extended workability and stable shape retention.
in Gypsum Plaster Applications — measured across six critical parameters
Smooth application and ease of troweling
Prevents premature drying, enables hydration
Vertical stability and thickness control
Allows finishing and adjustment
Aesthetic smoothness and uniformity
Long‑term durability
Recommended dosage ranges and additive synergy combinations across four plaster system types
Combine HPS with complementary additives for enhanced performance
Longer open time and smoother texture
Adhesion and flexibility enhancements
Crack and impact control
Set‑time control for hot weather
Match each gypsum plaster application to the optimal Hydroxypropyl Starch Ether grade for peak performance
Step-by-step guidance for surface prep, mixing, application and curing — plus targeted fixes for common on-site issues
Ensure the substrate is clean, dry, and structurally stable before application to achieve optimal adhesion and coating integrity.
Follow the correct sequence to fully activate HPS and achieve uniform, lump-free consistency throughout the mix.
Apply within the recommended thickness range for each system type to ensure proper hydration and surface quality.
Maintain controlled environmental conditions during the critical first 24 hours to prevent premature drying and surface defects.
Expert answers on hydroxypropyl starch ether dosage, compatibility, and formulation optimization for gypsum plaster applications
Typical dosage ranges from 0.2–0.4% by weight of dry mix, depending on application type and performance requirements.
Yes, HPS can be used alone and provides excellent water retention and workability. However, combining HPS with cellulose ether provides synergistic benefits.
ST2109 (1000–5000 mPa·s) is the machine spray specialist, offering exceptional thixotropy and anti-sagging performance.
Use higher viscosity HPS grades at dosage 0.3–0.4%, reduce water content, apply in thinner layers, and ensure proper material consistency.
Common causes include rapid drying, insufficient water retention, excessive layer thickness, and poor substrate preparation.
Yes, HPS is excellent for lightweight gypsum plaster. Use higher dosage to compensate for lightweight aggregate absorption.
Working time depends on formulation and conditions, typically 2–4 hours. HPS provides good water retention extending working time.
Yes, HPS is fully compatible with glass fiber, cellulose fiber, and synthetic fibers. The combination enhances crack resistance and overall performance.
Yes, HPS is excellent for gypsum putty. ST1403B (500–1000 mPa·s) is specifically optimized for putty applications, providing excellent workability and smooth finish.
Use appropriate HPS grade, optimize water content for pumpability, ensure complete dispersion during mixing, and test with actual equipment.
Grade selection · Dosage optimization · Formulation support · Sample requests
