HPMC
(Hydroxypropyl methylcellulose)
A white powder and a non-ionic cellulose ether derived from the chemical modification of natural cellulose, it is a key additive in the dry-mix mortar industry; even at very low dosage levels—typically just 0.02% to 0.5%—it can significantly alter mortar performance.
Four core functions:
1. Water retention
2. Thickening and sag resistance
3. Improved workability (lubricity)
4. Enhanced adhesion and crack resistance
Primary applications:
Interior and exterior wall putty
Plastering mortar; external wall insulation and crack-resistant mortar
Tile adhesive and tile grout
Gypsum plaster and gypsum leveling compounds
Repair mortar and self-leveling compounds (low-viscosity grades)
Product Selection
Mortar Products
Interior & Exterior Wall Putty
Tile Adhesive (C1/C2)
External Wall Thermal Insulation
Plastering Gypsum / Jointing Gypsum
Self-Leveling Mortar
Repair Mortar
Recommended viscosity
50000‑150000
40000‑200000
100000‑150000
40000‑75000
400‑1200
60000‑100000
Typical dosage
0.25-0.5%
0.2-0.4%
0.3-0.5%
0.2-0.35%
0.05-0.15%
0.2-0.4%
Project
Appearance
Solubility
Ash content (max. %)
Moisture content (max. %)
pH (1% aqueous solution, 20°C)
Viscosity of aqueous solution (2%, NDJ, mPa·s, 20°C)
Gelation temperature (°C)
Methoxyl content (%)
Hydroxypropyl content (%)
Index
White powder
Water-soluble
5%
5%
6-8
400-200000
60-75
19-24
4-12
Packaging size:
25 kg
20-foot container: 12 tonnes (480 bags)
Without pallets: 14 tonnes (560 bags)
40-foot container: 24 tonnes (960 bags)
Without pallets: 28 tonnes (1,120 bags)