• Remove any loose particles before applying Repair Express Plaster. Apply with a caulking gun or putty knife into the crack, joint or screw hole. Finishing with a wet spatula or trowel for a smooth finish. For large cracks, static joints or large screw holes apply preferably 2 layers of the product. Depending on the porosity of the substrate, apply the second layer of product after approx. 1 hour.