Adhesive and Sealant Applications & Tools

This is a quick video showing the insertion of backer rod, loading a bulk gun, and applying the sealant. Note:
1. The backer rod tool places the backer rod at a fixed depth and inserts the backer rod quickly. (This is a bit of an ideal joint, most joints are not a fixed width with nice edges, but this tool does improve the installation of backer rod.)
2. Putting a slight film of oil will help keep the material from sticking to the outside of the barrel.
3. Cordless provides a smooth continuous flow of material. (This applicator is running the tool a bit on the slow side, he could easily have doubled his speed. I guess that is the difference between an Engineer and someone who seals joints for a living.... the Engineer is too careful and slow.)

Labels: backer rods, bulk guns, joints, videos

   Why do people use their fingers to tool a joint?  Professionals use tooling knives or spatulas to smooth sealants after dispensing.  And they don't do it just to make the joint look good.
   Tooling is a critical step in the sealing of a joint.  Sealant manufacturers require that their products be pressed down into the void to ensure adhesion on both side and to smooth out all gaps and bumps from the surface..  Only after tooling is complete do you have an effective weatherseal: Air, Vapor and Water.
   You can't accomplish all that with your finger!

Labels: joints, tooling knives