CHEMISTRY

nes) from cast or 3D printed items, metals, wood or paper. So now we’ll take

a closer look at specific products and the

differences between them. Solvent type

adhesives can be categorized into two

groups, universal and weld type.

All of the solvent based adhesives described in this article come in sturdy glass

containers with a screw type lid with an

integrated brush applicator.

joint long enough to optimally act ont the

surfaces of contact to form a solid bond.

Personally, I think that Mr. Cement S

as the premiere extra thin product, which

I would recommend among these types of

products.

excellent opportunity to assess the surface quality of the model, indispensible for

the fixup of details. I do not recommend

the use of this product on white, or light,

coloured surfaces because the adhesive

may remain visible on the surface.

MC131 – Mr. Cement SP

Another member of the extra thin family

of cements from Mr. Hobby is Mr. Cement

SP. The SP stands for ‘Super Power’. This

is a product that has the same roots as

Mr. Cement S, but with a new recipe which

yields a higher rate of drying and a correspondingly increased bond strength. It is

well suited for stressed joints where we

may want a faster bonding between parts

and a higher strength to reduce the probability of a failure. This product is ideal

for wing to fuselage joints or for leading

edges of the wings. The quicker evaporation time, though, requires the modeller

to be efficient in the process as a whole,

more so than with the use of MC129 – Mr.

Cement S.

Source: here.

UNIVERSAL ADHESIVES

(BASIC)

MC127 – Mr. Cement Deluxe

Mr Cement Deluxe (or Mr. Cement,

the same product in a smaller packaging)

hails from the Mr. Hobby product line and

is their best for gluing together large surfaces but is still useful for small detail

items, too. It is a low viscosity liquid, meaning it flows easily and the time the solvent takes to evaporate is a little longer

than that of Extra Thin types. Mr. Cement

and Mr. Cement Deluxe (MC124/MC127)

are applied to the contact surfaces of the

components to be joined. The longer evaporation time of the solvent allows the

larger components being joined to be cantered properly. For the joining of smaller

parts, the same quality allows us to apply

small quantities of the cement to the contact surface in preparation for placing the

part in its final spot. This operation never

takes more than a couple of seconds and

the glue is ready to be applied throughout.

WELDING SOLVENTS

(BRUSH ON)

MC129 – Mr. Cement S

Mr. Cement S is an extra thin ‘Brush On’

type material which obviously refers to

its method of application. This involves

the joining of the two components together and running along the joint with the

solvent using the brush applicator. The

solvent evaporates very quickly from the

surface (the speed of which is comparable to acetone), but it remains within the

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INFO Eduard

TECHNICAL ASPECTS OF

SOLVENT BASED ADHESIVE

APPLICATION

The technical aspects of these types

of glues are pretty simple in and of themselves, with respect to their application.

They can be separated into two methods,

based on the type used.

Thin glues (slightly higher viscosity,

or thicker, than the extra thin variety with

a longer solvent evaporation time) require glue application to the join surface and

then attach the parts together and, if necessary, press the parts together.

Extra thin glues differ in that the parts

are first attached and the join is then

glue applied. If we aim to seal the joint

between the parts with the use of our

extra thin (such as fuselage half joining,

leading edges of wings, etc.) then there should be a small gap left between

MC 132 – Mr. Cement SP B

The last type of Mr. Hobby extra thin cement is Mr. Cement SP Black that directly comes from Mr. Cement SP. It is characterized by a very rapid drying time

and high strength between joined parts.

On top of that, it contains a black pigment

which serves as a consistency indicator

for greater application control. In recessed panel lines and joints, it can map out

crevices and scratches and provides an

December 2022