Asked by: Estelia Kalachevhobbies and interests woodworking
Can I spray varathane sanding sealer?
Last Updated: 26th April, 2020
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Just so, can you spray sanding sealer?
This lacquer sanding sealer is formulated to work best as a first coat, it is easy to sand, and speeds up finishing because it dries fast. One coat will seal hard wood, soft wood, plywood, particleboard and mdf. It is non-toxic when dry. Available in convenient 12-ounce aerosol spray with an adjustable spray valve.
Secondly, can you put sanding sealer over varnish? Other varnishes, such as polyurethane varnish, don't gum up sandpaper, so they sand easily without the need of a sanding sealer. (In fact, sanding sealer will hinder the bond of polyurethane, so you shouldn't use it.) Sanding smooth will be easier before applying the topcoats of varnish or lacquer.
Regarding this, do I need to use sanding sealer before polyurethane?
Polyurethane bonds especially poorly to sanding sealers, so most manufacturers of polyurethane discourage their use. Furthermore, polyurethane sands easily, so there isn't any need for a sanding sealer.
Why do you use sanding sealer?
A sanding sealer can be used on bare, unstained floors, doors, furniture and cabinets prior to applying either an oil-based or a water-based clear finish. It is designed as a base coat that will dry quickly, seal the pores, and sand easily with fine sandpaper to create an ultra-smooth foundation.