Elastomeric Wall Coatings for Stucco, Block and Concrete

Elastomeric coatings are water based acrylic products applied at several times the thickness of normal paint. Once cured, they form a rubbery membrane that can stretch and return to shape. This lets them bridge hairline cracks without splitting.

They are also breathable enough to let moisture vapor escape from the wall, which helps prevent blistering. Different brands vary in stretch, texture and color range, and we help you choose.

Stucco is the classic candidate, especially older stucco with hairline cracks. Concrete block, tilt up panels, cast concrete and some brick walls also take elastomeric coatings well. They can be applied to retaining walls, parapets and garden walls.

Not every surface suits them. Walls with active water intrusion or heavy salt damage need correction first. We inspect and tell you whether coating will help.

Elastomeric products bridge hairline cracks, but wider ones need repair. We rake out larger cracks, fill them with flexible sealant or patching material and texture the repair to match the wall. Skipping this step lets cracks reappear.

We also look for patterns. Repeating diagonal cracks near windows or stepped cracks near foundations may signal movement that coatings cannot solve alone, and we flag them early.

Dirt, chalking paint, efflorescence and mildew all prevent adhesion. We pressure wash, treat biological growth, remove loose material and let the wall dry. Peeling paint is scraped, and glossy surfaces are scuffed or primed.

Prep takes time but decides the outcome. We protect windows, doors, plants and fixtures with masking and drop cloths before anything is applied.

Bare stucco and masonry are absorbent. A masonry primer or conditioner evens out absorption, locks down dust and improves bond. On very porous or chalky walls, it is essential.

We match the primer to the wall and the coating. Where stains or efflorescence are present, a stain blocking primer keeps them from bleeding through the finish.

We apply the coating by airless sprayer, roller or brush, depending on the texture and the job. Spraying is fast and even, and back rolling pushes the material into the stucco texture. Two coats are standard, with drying time between them.

Thickness is critical. A thin application loses the flexibility that makes elastomeric coatings effective. We measure coverage rate and mix material thoroughly to maintain consistent film build.

Elastomeric coatings come in many colors, with flat and low sheen finishes most common. Lighter colors reflect more heat, which helps keep walls cooler in strong sun. Very dark colors absorb heat and can increase stress on the surface.

We bring color samples and test patches so you can see them in daylight. HOA properties often have approved palettes, and we work within them.

Parapet caps, ledges and tops of walls collect water, so we detail them with extra care. Some elastomeric products are made for horizontal use, and others are not. We choose the right product for sloped or flat surfaces and reinforce joints with fabric where appropriate.

Flashing and sealants are checked before coating, since water entering behind the finish defeats the purpose of the coating.

Coastal fog, morning dew and sudden rain affect when coatings can go on. Surfaces must be dry, and conditions need to stay in the product's temperature range while it cures. Hot wind can skin a coating too quickly, so we avoid the worst parts of the day.

We build weather into the schedule and protect fresh work if conditions change. Most exterior projects are planned for settled weather.

Regular exterior paint is thin and relatively rigid. It looks good at first but may crack as the wall moves. Elastomeric coatings are thicker, more flexible and better at stopping water, but they cost more up front and are harder to remove later. They are not a cure for structural or plumbing problems. For a sound wall with hairline cracks, though, elastomeric coating is often the better long term protection.

Apartment complexes, offices and retail centers benefit from elastomeric coatings because walls are large and maintenance is predictable. We coordinate with managers on notice to residents, scaffolding or lifts, and phasing by elevation or building.

Color consistency across large areas matters, so we work from a single batch where possible and log lot numbers for future touch ups.

Rinse walls annually with low pressure water to remove dust and spider webs. Trim plants that touch the surface and watch for sprinklers that spray the wall. Inspect for new cracks, peeling or stained areas after heavy rain.

Small touch ups are easy if caught early. Keep leftover paint from the same lot for color match.

Look for hairline cracks, chalky residue when you rub the wall, fading, mildew streaks, peeling paint and dark damp patches after rain. Water stains inside near exterior walls also deserve attention.

An inspection shows whether cleaning and repainting is enough or whether a full elastomeric system is the better choice.

Water behind a wall can come from the wall surface, but it can also come from roof edges, windows, planters and plumbing. Coating the outside will not fix a leak that starts somewhere else. We look at flashing, sills and sprinkler spray patterns first.

If moisture is already trapped in the wall, we recommend drying and repairs before coating. Sealing in water is a common reason coatings fail, and we would rather tell you than apply over a problem.

A typical project begins with a walk around the building and a written scope. We set up masking and scaffolding, wash and treat the walls, repair cracks and patches, prime where needed and apply two coats. Detail work around windows, trim and fixtures comes last.

We then walk the finished wall with you, touch up missed spots and review care notes. Crews keep the site clean each day.

Our epoxy floor cost guide explains what moves the price. Send photos and rough dimensions through the free estimate form and we respond within 24 hours. Site walks are available the next day or later, depending on availability, and you receive a written scope after the visit.