Product Overview

Sprayset HBL is a factory-blended, polymer-modified, cementitious background levelling mortar from Fosroc that can be applied by either hand (trowel or float application) or spray (using render pump equipment), providing versatility for both small and large-area surface levelling and background preparation works. Background levelling mortars serve a critical function in building envelope, waterproofing, and surface finishing works: concrete and masonry surfaces as-struck are rarely flat and regular enough to receive a quality finish coat, waterproofing system, or decorative render directly without intermediate surface regularisation. Out-of-plane irregularities, form tie holes, blowholes, surface voids, construction joints with misaligned shutter boards, and general surface roughness all need to be levelled before the final finish or waterproofing system is applied. Sprayset HBL is designed to fill and level these surface irregularities in a controlled mortar coat of varying thickness, building up the surface profile to a consistently flat background for subsequent work. The polymer modification provides improved adhesion, reduced shrinkage, and water resistance compared to a standard sand-cement render mix. The product can be applied by hand trowel for small areas and precision levelling, and by spray machine for large-area industrial and infrastructure applications. Space Arc Engineering distributes Sprayset HBL for building envelope, infrastructure surface preparation, and waterproofing system substrate work across Delhi NCR, Ghaziabad, and Northern India.

Applications

• Background levelling coat on concrete surfaces before waterproofing application
• Surface regularisation of concrete walls and soffits before decorative render finishes
• Filling and levelling of form face irregularities, blowholes, and tie holes
• Background preparation coat in external wall render systems
• Substrate levelling before tile adhesive and tiling in industrial projects
• Large-area spray-applied background coat on concrete or masonry structures

Key Advantages

• Dual application method — hand trowel or spray machine for maximum versatility
• Polymer modification for improved adhesion and reduced shrinkage crack risk
• Fills and levels surface irregularities efficiently in one background coat
• Provides a stable consistent substrate for subsequent finishes and coatings
• Compatible with Fosroc waterproofing systems as the substrate preparation coat
• Factory-blended for consistent polymer content and mortar quality