Tensol 12 is a single component, solvent based adhesive consisting of acrylic monomer and polymer
dissolved in solvent for the bonding of acrylic sheet for interior use only. Tensol 12 hardens as the solvent
evaporates depositing polymer in the joint. The solvent also softens the surfaces being joined so that they
fuse together, hardening as the solvent migrates into the body material.
Tensol 12 is designed for the bonding of cast acrylic sheet intended for interior use only. Extruded acrylic
sheet can be used if it is suitably annealed prior to bonding. Tensol 12 must not be used with Perspex ME,
SW or AG grades and is not suitable for laminating sheets. Typical bond strengths are 24 MPa for a cold
cured joint and 30 MPa for a post cured joint.
METHOD OF USE
Before using Tensol 12 store the adhesive at 5 to 10oC for 12 hours to reduce solvent evaporation between
applying the adhesive and assembling the parts. Dispense the adhesive from a small polythene bottle
fitted with a wide bore hypodermic needle that has also been refrigerated.
Surfaces to be bonded should be clean, dry and dust free. If necessary they can be cleaned with
petroleum ether or white spirit then washed with water. Extruded or machined parts should be annealed
before bonding to prevent stress cracking. Annealing is carried out by heating the parts to 80 to 85OC for 1
hour then allowing them to cool slowly to room temperature.
Tensol 12 has limited gap filling ability so surfaces to be joined should be close fitting.
The solvent in Tensol 12 may cause soluble colorants to migrate. If colour is important check for any
migration by making a small test joint first.
Dispense the refrigerated cement directly into the joint using a suitable dispenser. It is best to do this in
one smooth motion to avoid any bubbles or voids in the bondline.
Joints will be set sufficiently to be handled after 3 hours but must not be machined for at least 24 hours
after bonding. Maximum bond strength is reached in 3 weeks at room temperature but, for most
applications, 1 to 2 weeks should be adequate. To obtain the maximum strength more rapidly the bond can
be left for 24 hours then post cured for 8 hours at 80oC.