Apply these adhesives to the outer surface of the mold.
When using the contact type glues Welbond and UHU, did you apply a thin coat to both sides, let them dry for 10-15 minutes, and then put them together? I know that Welbond is far stronger if left to dry first. First pace out the intended path, marking each footfall with a pebble. Apply these adhesives to the outer surface of the mold. For stepping stones, this will require approximately 4-5 ounces Weldbond per stone. It would be for using on the folding leading edge on Hell Raiser wings. Concrete which has been completely painted with either concrete paint or patio paint need not be sealed. Hmm Would the uhu stuff be a good sub for 3m77? Gotta get this kit put together soon. You can also use the pigment to do a wash over the finished stone to add color and depth.
Avoid vigorous tapping when removing air bubbles; this can cause cracks in the plastic. You can also use the iron oxide pigment to do a wash over the finished stone to add color and depth. Choose a color to color to mix with the concrete before putting it in your mold. Patio Paint is formulated for water resistance and excellent adhesion in changing temperatures. Do not lift filled molds while the concrete is still wet.