Roofing & Exterior
Elastomeric Bridges Cracks. It Also Traps Water If the Wall's Already Wet.
High-build elastomeric coatings that stretch over hairline cracks on stucco and masonry — and the honest read on when they protect a wall versus when they seal moisture inside it.
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Signs to watch
Is this you?
Recurring hairline cracks in stucco or masonry
If a wall keeps cracking as it moves, a thick elastomeric film can stretch across those hairlines instead of splitting like standard paint. That crack-bridging is exactly what elastomeric is built for.
A wall taking a beating from wind-driven rain
Exposed elevations that catch horizontal PNW rain benefit from a high-build coating that seals the surface — provided the wall is dry to begin with and can still shed the moisture already in it.
You've been quoted elastomeric and aren't sure
Elastomeric gets sold as a cure-all. It isn't. On the right dry wall it's excellent; on an already-damp or poorly-drained wall it traps water and causes the peeling it promised to prevent. The wall decides.
Previous elastomeric that's blistering or peeling
When elastomeric fails it's usually because it was applied over moisture with nowhere to escape. The blisters are trapped vapor. Fixing it means finding the water source, not just recoating.
Your options
When elastomeric is right — and when it isn't
Elastomeric is a thick, high-build, flexible coating that dries to a film many times heavier than ordinary paint, so it stretches across hairline cracks and seals a surface against wind-driven rain. On a sound, dry stucco or masonry wall that keeps cracking, it's genuinely the right tool. The catch is breathability: elastomeric is far less permeable than standard masonry coatings, so on a wall that's already damp — or that can't drain — it traps moisture behind the film and blisters. We'll only recommend it after we've confirmed your wall is dry and doesn't need to breathe more than the coating allows.
The method
How we do it
- 01
Confirm the wall can take it
We check for moisture, drainage, and the source of the cracking. A dry, sound, moving wall is an elastomeric candidate; a damp or poorly-drained one isn't, and we'll steer you to a breathable coating instead.
- 02
Prep, repair, and prime
Wash and let it dry fully, repair larger cracks and defects the film shouldn't have to bridge alone, and prime as the system requires so the heavy coating bonds properly.
- 03
Apply the high-build film
Elastomeric applied at the manufacturer's specified thickness — the mil build is what gives it the flexibility and crack-bridging, so coverage rate matters as much as the product itself.
Straight numbers
What drives an elastomeric job
Elastomeric costs more than standard masonry paint, and the honest reason is material and build. What moves the number: it's a thick, high-build coating applied at heavy coverage, so it uses far more product per square foot than ordinary paint; wall square footage and texture depth; how much crack and defect repair the surface needs first; and whether moisture assessment turns up a drainage issue that has to be solved before any film goes on. It's a real investment on the right wall — and a waste, or worse, on the wrong one. We assess before we quote.
Where we do this work
Elastomeric Wall Coatings: straight answers
Is elastomeric just thicker paint?
It's more than that. Elastomeric dries to a film many times heavier and far more flexible than ordinary paint — that's what lets it stretch across hairline cracks and seal a surface against driving rain. But it's also much less breathable, which is the tradeoff: the same film that seals rain out can seal moisture in if the wall's already wet.
Will elastomeric fix the cracks in my stucco for good?
It bridges hairline cracks and moving cracks well, which is its main strength. It won't fix structural cracks or a wall that's actively failing — those need repair first, because no coating should be asked to hold a wall together. For fine cracking on a sound wall, though, it's one of the better tools there is.
Can elastomeric cause moisture problems?
Yes, and this is the honest downside. Because it's far less breathable than standard masonry coatings, elastomeric applied over a damp wall — or a wall that can't drain — traps water behind the film, and it blisters and peels. That's why we test for moisture and check drainage before recommending it, and why we sometimes tell people not to use it.
Should I choose elastomeric or a breathable masonry coating?
It comes down to the wall. If it's dry, sound, and keeps cracking or takes hard wind-driven rain, elastomeric's crack-bridging earns its keep. If the wall carries moisture or needs to breathe, a permeable masonry coating is the safer, longer-lasting choice. We look at moisture and drainage first, then recommend the one your wall can actually live with.
Get the elastomeric wall coatings conversation started.
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