Tips & Techniques

Preparation & Use

Joint design:

Joints should not be more than 1/2″ in width or depth. Joints deeper than 1/2″ should be filled to withing 1/2″ of the surface with a closed-cell backer rod.


Surfaces to be caulked/sealed must be clean, dry and free from oils, loose mortar, laitance, form release agents, old caulking, old paint or other contaminants. Allow new concrete to cure for 30 days before caulking.


Mask areas that are not to be caulked/sealed. Remove masking immediately after tooling before a skin has formed on the caulk/sealant.


Cut nozzle at 45° angle to the desired orifice /bead size. Load cartridge into a caulk gun and squeeze trigger to start flow of material. Keep nozzle pressed against the surface and slowly draw along seam. Apply a uniform, continuous bead. Apply caulk bead with a raised crown to allow for shrinkage. Cured beads should be between 1/8″ – 1/2″ wide and 1/8″ – 1/4″ deep.


Tool caulk with appropriate tool to ensure firm, full contact with the surface or the joint. If necessary, smooth the surface with wet finger or spatula and wipe off the excess with a water-dampened rag.


For best results, priming is recommended prior to caulking.  Determine the primer based on the substrate, any topcoat, and any required performance. Painting: (temperature and humidity dependent) for best results, a minimum of 4 hours dry time is required before painting with latex or oil base paint. Allow extra dry time during periods of high humidity and/or cool temperatures.


Clean tools and excess sealant with soap and water or a damp cloth while still wet.

Tips and techniques for spackling compound:

After the White Lightning® spackling compound dries, sand smooth if desired. Let the area dry for 30 minutes before painting. Large holes or cracks may require longer drying times. It is always recommended to prime with spackling compound before top coating with paint. Due to the porosity of some substrates, the entire surface to be painted may require primer for the most uniform appearance of the topcoat. Clean-up with water.

** Note: tips & techniques may vary by product