The Best Adhesive for Glass Blocks16 August 2011
We at C-Tec, when exhibiting at trade fairs are often asked “Is CT1 good for bonding Glass Blocks?” This question is so frequently asked because the adhesives on the market for bonding Glass Blocks, although they fulfil the task of Glass Block Bonding have all in their own situation a disadvantage.
Let’s look at the type of adhesives available for Glass Block Bonding, firstly a silicone sealant/adhesive which initially looks as if it has provided a good bond but the disadvantages are that the Glass Bond will shrink due to the solvents evaporating from the silicone. The silicone will be too flexible; therefore if a Glass Block wall was created there would be too much movement with the possibility of collapse. In addition the silicone itself would lack bond strength to achieve a structural bond for Glass Blocks.
Next is a one component mastic panel adhesive type. The problem with these types is that they are slow to cure and lack total flexibility so when the Glass Blocks move the bond will break.
Thirdly, there are two component epoxies which are the most expensive for a task such as Glass Block Bonding. The epoxy adhesive is a two part adhesive that needs to be mixed. This adhesive no doubt will create a strong bond for Glass Blocks but the disadvantages, apart from being expensive are, difficult to mix – actually if you do not mix the adhesive correctly the adhesive will not work. Also the epoxy is slow to cure and has no flexibility at all.
The best adhesive for Glass Bonding is the unique CT1 adhesive and sealant. CT1 is a unique hybrid polymer with exceptional bond strength, at least ten times stronger than one component mastic. CT1 will remain flexible but not too flexible. This is the perfect adhesive for Glass Bonding.
Due to CT1’s unique formulation it can be applied on wet surfaces even underwater, it’s the only adhesive on the market that can create long term underwater structural bonds. When applying an adhesive onto Glass Blocks it is an advantage to be able to structure or spread the adhesive without it stringing, CT1 can be spread with ease for perfect matching.
Not only is CT1 the best Glass Block Adhesive, CT1 is also the best sealant available. CT1 can be used for finishing off/grouting the joint. It is advantageous to clean the Glass Blocks before applying CT1. The best solution for this is our C-Tec Multisolve, a safe aliphatic solvent. Multisolve will degrease the Glass Blocks without staining and evaporate 100% leaving no residue. Multisolve is a great aftercare product for cleaning the Glass Blocks.
CT1 is available in various colours but the transparent is completely clear, perfect for Glass Block Bonding. © Copyright.