Excellent breathability — fully met heritage conservation standards for historic masonry substrates.
Precision‑engineered Novastar™ HPS for hand‑applied gypsum plaster systems — extending open time, eliminating sag on vertical & overhead surfaces, and delivering the silky‑smooth finish professionals demand.
Hand‑applied plastering (also called manual plastering) is the traditional method of applying cement‑, lime‑, or gypsum‑based plaster using hand tools such as trowels and floats. Despite mechanized alternatives, craftsmen still prefer manual techniques for:
Delivers good workability and a 30–60 min open time for unhurried manual application, while ensuring a smooth, crack-free finish on interior cement plaster walls.
Enhanced workability for outdoor conditions, strong water retention against premature drying, and anti‑sagging performance on vertical facades.
Provides extended open time and vapor permeability ideal for historic buildings, ensuring compatibility with traditional substrates while maintaining modern application performance.
Improves adhesion and rheology for thick base coats, delivering consistent workability and superior bond strength on demanding substrates.
Ensures easy troweling and uniform texture at 5–8 mm thickness, delivering a consistently smooth, professional finish coat on interior and exterior surfaces.
Provides workability and shape retention for custom textures, enabling consistent hand‑applied results across a wide range of decorative finish styles.
Six measurable advantages that make Landu Novastar HPS the preferred additive for manual plaster formulations — from workability to operator comfort.
Four precision-engineered grades covering the full spectrum of manual plaster applications — from interior finishing coats to thick exterior render.
Smooth application and cost-effective for interior finishing coats.
Wide viscosity range delivers outstanding versatility across applications.
Superior anti-sag performance and weather resistance for premium facades.
High viscosity multi-functional grade ideal for thick render coats.
Four reference formulations covering the full range of hand-applied plaster types — select the grade that matches your substrate and application.
Three verified field applications demonstrating measurable impact across diverse plastering contexts.
Datasheets, application guides, and step-by-step video tutorials for Landu Novastar HPS manual plastering.
Frequently asked questions on dosage, grade selection, compatibility, and application performance for hand‑applied plastering.
0.15–0.35% depending on plaster type.
Interior: 0.15–0.25% · Exterior: 0.20–0.35%
ST1403B or ST1506A are excellent choices, offering good workability and cost-effectiveness for finishing coat applications.
Yes. HPS is fully compatible with lime-based plasters. ST1506A is recommended at 0.18–0.28% to enhance workability and water retention without affecting breathability.
Use higher viscosity HPS — ST1703A or ST2442 — at 0.25–0.35%, reduce water content, and apply at the recommended coat thickness to maintain vertical stability.
Typically 30–60 minutes with standard HPS dosage. Can be extended by adding HPMC at 0.05–0.15% or incorporating chemical retarders into the formulation.
Increase HPS dosage by 0.05–0.10%, add HPMC at 0.05–0.10% for additional lubricity, and fine-tune water content to achieve the desired buttery consistency and troweling ease.
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