Name: HPMC Thickener K100M
Brand: Coatingsink
SKU: hpmc-k100m-thickener
Availability: InStock

Question 1

What dissolution method is recommended for HPMC K100M in tile adhesive formulations?

Accepted Answer

Disperse HPMC K100M powder in hot water (80–90°C) with vigorous agitation until fully wetted, then cool to below 40°C to achieve full hydration. Alternatively, pre-mix dry with cement before adding water. Avoid adding directly to cold water without shear, as it will form lumps. Typical use level in cement-based tile adhesives is 0.2–0.5%.

Question 2

How does K100M compare to lower-viscosity HPMC grades in render applications?

Accepted Answer

K100M's 100,000 mPa·s viscosity provides significantly higher water retention (>95%) and anti-slump performance versus grades below 30,000 mPa·s, making it the preferred choice for thick-layer renders and external insulation composite systems (ETICS). However, its high viscosity requires careful metering; over-dosing above 0.5% can reduce workability and extend setting time.

Question 3

Is HPMC K100M compatible with redispersible polymer powders (RDP)?

Accepted Answer

Yes, HPMC K100M is fully compatible with VAE- and EVA-based RDPs. The combination synergistically improves both water retention and flexibility. A common starting formulation uses 0.25–0.35% HPMC K100M alongside 2–5% RDP in a Portland cement matrix for C2 class tile adhesives per EN 12004.

Methoxyl Content	19–24%
Moisture Content	≤5%
pH (1% solution)	5.0–8.0
Viscosity (2%, 20°C)	80,000–120,000 mPa·s
Hydroxypropoxyl Content	4–12%

HPMC Thickener K100M

Specifications

FAQ

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