M

Mastic
Highly viscous adhesive material applied by trowel to give thick glue lines with gap sealing properties.

Mechanical Adhesion
Adhesion between surfaces in which the adhesive holds the parts together by interlocking action. (to know more about mechanical adhesion, visit the Adhesion Guide ).

Melamine formaldehyde, MF (extended definition)
Melamine is a colorless crystalline substance derived from dicyandiamide and forms a resin suitable for adhesives when joined with formaldehyde .

Modified-phenolic adhesive
Highly used for making highstrength metal-to-metal and metal-to-wood joints, and for bonding metal to brakelining materials. Requires heat and pressure for the curing process. (see also Phenolic / Phenol Formaldehyde, PF )

Moisture content
Amount of water in a material determined under prescribed conditions, and expressed as a percentage of the mass of the moist specimen, that is, the mass of the dry substance plus the water present.

Moisture scavenger
Additive used in PU systems, zinc rich adhesives and other water-sensitive compositions to remove the residual water, which may come into adhesive with solvents, pigments and other ingredients and cause a reduction in binder reactivity and adhesive defects. Monofunctional isocyanates, oxazolidine derivatives, and synthetic zeolytes (alkali aluminium silicates) are the most used commercial moisture scavengers.

MS Polymer (extended definition)
Silane-modified adhesives and sealants based on MS polymers (Modified Silane Polyether) are designed as one-component systems. Due to their chemical structure MS polymers exhibit good weathering and aging resistance as well as an almost universal adhesion spectrum without need of primers. Especially on critical substrates MS polymers often succeed where other systems fail.