Boot Patch that really works
Sikaflex 1a moisture-cure polyurethane
SIKAFLEX 1A is a, "...premium-grade, high-performance, moisture-cured, 1-component, polyurethane-based, non-sag elastomeric sealant" (per the manufacturer). Depth of applied material should be less than 0.5 inch for proper curing.
Click on the picture on the left to see how we use it as a very effective rubber boot patch.
We sell SIKAFLEX 1A in the 10.1 fl. oz., (300ml) caulking-gun size. You might be able to get this cheaper through Amazon or somewhere. Make sure it is fresh material wherever you get it - there is a date on the package.
In general, SIKAFLEX 1A is a nice tool to have in your box. It is far superior to silicone caulks as a water sealant. It is certified to NSF/ANSI 61 for potable water contact. And, for our purposes, it demonstrates excellent
- adhesion in wet environments,
- weathering and resistance to aging.
Good job, Sikaflex folks!