Bermocoll ML 31 cellulose ether


BERMOCOLL ML 31 is a modified non-ionic, water soluble cellulose ether, intended as a water

retaining and consistency improving additive to cement based mortars. BERMOCOLL ML 31

contains methyl, ethyl and hydroxyethyl substituents giving a unique balance between

workability and strength.



BERMOCOLL ML 31 is a modified high viscosity grade of methyl ethyl hydroxyethyl cellulose.


Physical data

Appearance: whitish powder

Particle size: 98 % < 600 μm

Water content: max 5 %


Characteristics of aqueous solutions

pH (1 % solution): neutral

Surface activity: weak

Viscosity at 20°C

(Brookfield LV)

1 % solution: 2,900 – 3,900 mPa.s



BERMOCOLL ML 31 is used in cement-based tile fix and joint mortars for improvement of workability, consistency, water retention and adhesion. Normal dosage in mortar is 0.3 - 0.7 % calculated on the dry mortar weight. BERMOCOLL ML31 effectively counteracts the slip tendency of tiles.


BERMOCOLL ML 31 is intended for dry mixing with other powder materials and should not be

used for direct dissolving in water.


Packaging and Storage

BERMOCOLL ML 31 is packed in multiply paper bags with an inner polyethylene bag. Net weight 15 kg. We recommend emptying the bags from the bottom. The empty bags can be recycled or burned. In unopened bags, BERMOCOLL ML 31 can be stored for several years. In opened bags, the moisture content of BERMOCOLL ML 31 will be influenced by the air humidity.


At the temperatures above 250°C (480°F), charring of BERMOCOLL ML 31 will occur. At high

temperatures and in contact with an open flame, BERMOCOLL ML 31 will burn slowly with the

characteristics of cellulose.