Interior and exterior architectural applications present their own unique
coating related problems. In both cases, aesthetics and ease of application are
properties that must be addressed.
Exterior coatings and sealers are particularly susceptible to weathering. Therefore,
an effective exterior coating will typically be formulated to repel water. This
reduces the ability of mold and mildew to form, and provides added durability.
Examples of typical exterior applications are house and trim paints. Surface modifiers
are used to provide early, as well as long-lasting, water resistance. Early water
resistance is critical since fresh paint may be exposed to damaging weather immediately
Interior coatings and sealers must be formulated for cleanability and anti-blocking.
They must be very easy to apply, and "feel good on the brush," particularly
with the do-it-yourself market in mind.
Anti-blocking can be achieved using wax emulsions for interior trim paint and sealers.
For example, the use of a surface modifier will effectively eliminate windows from
sticking to trim - a common interior problem. Cleanability can also be improved:
proper selection of surface modifier additive can resist the penetration of stains
and make the paint surface easier to clean.