Cyanoacrylate (CA glue) has amazing strength in surface-to-surface bonding. Beyond everyday repairs, certain types are used for bonding skin for closing lacerations in emergencies and for other surgical procedures. One major factor of the glue’s effectiveness is the amount of surface contact. Originally produced as a liquid, CA glue is now also offered as a gel, enabling it to fill in small gaps in open cracks.

Recently I learned about a new application for CA glue that gives it a more third dimensional way for filling in larger gaps and forming better support for small points of contact. Recently I witnessed an auto repairman sprinkle a bit of powder on a broken part in my car then he added a drip of CA glue to it. The powder soaked the CA glue in immediately and in just seconds made a rock hard bond.

After doing a little research I found that baking soda can be used as the powder for this kind of bonding so I decided to try it out for myself. I broke apart a plastic beam from some window blinds to experiment with. As illustrated by the photo you can see how the two parts were joined and the missing gaps around the hole were filled in using a “build up” technique of successive CA glue applications. I also bridged the cracks inside the hollow beam to add more strength. To my delight the repair was incredibly strong!

The application of baking soda in combination to CA glue opens new doors for repairs. The ability to instantly close gaps and build points of support with rock-hard bonds is revolutionary. Caution should be taken when handling CA glue because it can bond your skin (such as your finger tips) together or to another surface. Acetone, often found in nail polish remover can be used as a solvent to loosen and separate bonded skin.

It came by accident. I was wondering if a plastic drinking straw would work as an emergency tinder. When I lit one, it had an unexpected result. There was a small flame but the straw began to shorten while melting and started to drip. That’s when it occurred to me that the molten plastic might be used to glue items together. I had two wooden slats close by so I lit the remainder of the straw and let it drip on the end of one of the pieces of wood. As the flame got close to my fingers I dropped the remaining straw onto the puddle where it finished burning. When the flame went out, I applied the end of the second piece of wood on top of the puddle and pressed it down. Then I put a heavy object on top of them and waited about 5 minutes. I removed the weight and was able to pick the glued sticks up by one end and wave it around like a wand. Then I grasped the sticks at each end and gave it some torque to test it which proved to be quite strong. With increased pressure one of the sticks broke before the adhesive did.

Although it’s a little difficult to control the melting process I would imagine that it could also be used as a seal for small seams or holes. You can try this out for yourself to get a feel for it’s capabilities. Needless to say, use caution when handling molten material to avoid personal injury and only use flames in a safe noncombustible work area.