Sand fixing agent interface agent

Fix Weak Surfaces Before Coating

Poor-quality concrete that crumbles or sands when you rub it will cause any waterproof coating to peel off within months. This high-penetration polymer agent soaks into the weak surface layer, hardens it, and creates a solid bonding base. Use this before applying PU coating, JS coating, or liquid membrane to guarantee adhesion and long-term performance.

  • Increases concrete surface hardness by 5-8 points
  • Deep penetration — consolidates loose, sandy substrates
  • Creates strong bonding surface for subsequent coatings
  • Prevents coating peeling, blistering, and delamination
  • Water-based, low odor, easy application
  • Essential companion product — sell alongside waterproof coatings

Technical Data

Product TypeWater-based polymer penetrant / interface agent
AppearanceMilky white liquid
Solid Content≥ 18%
Penetration Depth2-5mm
Hardness Increase5-8 points (pencil hardness)
Drying TimeSurface dry 30-60 min, apply coating after 4 hours
Coverage0.15-0.25 kg/m²
ApplicationBrush, roller, or spray
Shelf Life18 months (sealed)
Packaging5kg / 10kg / 20kg
MOQ50 buckets

Bundle with Waterproof Coatings for Complete Solutions

Sell sand fixing agent as a companion product with PU coating or JS coating. Higher order value, better results for your customers.

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