Before you start with assembling two materials by means of an adhesive bond, the surfaces must be dry and properly cleaned and degreased first.

Always assume that the surface to be bonded is contaminated and therefore clean both surfaces with TWEHA Cleaner+ and a cloth. TWEHA Cleaner+ is a bonded-cladding-detergent based on Isopropyl alcohol.
Always use a lint-free, non-coloured cloth that does not contain any additives, contaminants or polishes. Clean by rubbing in only one direction, otherwise the contamination on the fabric may end up on the surface again. Never use a cloth several times.
Do not touch the cleaned surface with your fingers again, otherwise skin grease will be on the surface again.
Never use thinner or a gasoline based liquid for degreasing! These are so-called petroleum derivatives and these only make the subsurface more greasy!

If needed roughening ensures that the adhesive can flow in a roughened surface. This increases the adhesion surface and creates a better connection.
Note: the adhesive layer of THEHA Tape will not flow, so when roughening a smaller adhesive surface is created, so, in case of an aluminum framework, never roughen the surface!

Fiber cement: Loose fibers and cement granules
HPL: residue of protective film
Natural stone: sludge or residue from sawing process.
Tiles / ceramics: Cleaners and moisture
Metal: Oil, grease, rust and moisture
Glass: Fingerprints, silicones and moisture
Plastic: Release agents, dust and plasticizers
Rubber: Talc, grease and plasticizers


Before starting check with a peel-of test.

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