What are elastomeric wall coatings?
Promain's elastomeric coatings use flexible polymer binders, often acrylic, with long chains that let the cured coating expand and contract as walls and the substrate move. Compared with conventional paints, an elastomeric wall coating is thicker and better able to bridge hairline cracks without splitting under normal surface movement.
What is acrylic elastomeric coating?
Promain stocks acrylic elastomeric paint for exterior wall protection. This flexible coating can provide adhesion, weather resistance and crack bridging. Many elastomeric wall coatings are water based, but performance varies, so check the technical data sheet for the selected product.
Why choose elastomeric wall coatings from Promain?
Exterior wall surfaces face heavy rain, wind driven rain, sun exposure and repeated temperature changes. Promain supplies elastomeric wall coatings designed to protect exterior walls from water ingress while moving with sound render or masonry. This can reduce peeling and cracking on an exposed building.
How does crack bridging work?
Crack bridging is a key reason customers choose elastomeric coatings from Promain. The cured wall coating moves across small existing cracks without immediate failure. Some products bridge hairline cracks at 200% to 300% stretch, while the Promain range includes products stating up to 400% elasticity.
Rust-Oleum Murfill Renovation Paint, available from Promain, is stated to bridge gaps up to 2 mm. Fosroc Dekguard E2000 can accommodate cyclic substrate movement up to 0.3 mm. Some broader data cites cracks up to 5.58 mm, but individual product data should take priority.
Elastomeric paint can bridge hairline cracks but is not a structural repair. Promain would not recommend using a wall coating to hide large or active cracks in masonry structures. Movement should be investigated first. Repair the building fabric so damaged walls leave a stable substrate before forming the new finish.
Which surfaces can Promain elastomeric coatings cover?
Promain offers elastomeric wall coatings for masonry, render, stucco, concrete block and selected concrete surfaces. Some coating systems also work on previously painted surfaces. Check the product data to confirm the substrate before work starts on the building walls.
Elastomeric wall coatings for masonry walls
For masonry walls, Promain stocks flexible products that can move with fine cracking and help resist rain. Bedec Extra Flex is made for roughcast, pebble-dash, brickwork, cement and concrete rendered surfaces and offers up to 400% elasticity, making it a useful exterior wall option where crack bridging is required.
Promain elastomeric coatings for concrete
For concrete walls, Promain supplies specialist options including Fosroc Dekguard E2000. This water-based elastomeric coating is designed for reinforced concrete and masonry structures, resisting water, carbon dioxide and chloride ions while allowing moisture vapour to escape from the structure.
Exterior wall coating for brick and concrete block
Promain's exterior wall range includes products for porous brick walls, stucco and concrete block on the building exterior. A suitable wall coating helps waterproof walls against rain while maintaining stated vapour performance and forming a resistant outer finish. Confirm compatibility before applying primer or paint to exterior surfaces.
Is elastomeric paint waterproof for walls?
Many elastomeric coatings sold by Promain are designed to provide long term waterproof protection against weather exposure. Rust-Oleum Murfill Renovation Paint, for example, is described as waterproof and microporous. That does not mean every elastomeric wall coating forms an airtight waterproof seal or suits permanently wet or below-ground work.
Use Promain's product guidance alongside the manufacturer's data. A wall coating can resist liquid water while allowing moisture vapour to leave the substrate. Fix leaks, failed pointing and open cracks in walls before application.
Weather resistance in harsh conditions
Promain supplies elastomeric wall coatings for exterior wall surfaces exposed to harsh weather conditions, heavy rain and repeated wetting. A high performance coating can offer excellent resistance to cracking, flaking and dirt pick up. UV exposure and local weather conditions still influence durability, color retention and maintenance intervals.
What is a heat reflective elastomeric coating?
Some exterior coatings available through Promain use heat reflective pigments to reduce solar heat absorption. A heat reflective flexible coating may support energy efficiency by lowering surface heat gain. Performance varies by product and test method, so only make an energy efficient claim where the selected data supports it.
Heat reflective technology addresses solar gain rather than replacing insulation. A heat reflective finish can support an energy efficient building envelope, but insulation and construction remain more important.
How thick are elastomeric coatings?
Promain's elastomeric coatings are generally higher-build than standard exterior paint. Some industry sources describe these products as around ten times normal paint. Use the coverage and dry film thickness stated by Promain and the manufacturer rather than estimating by eye.
How does an elastomeric wall coating stay flexible?
The polymer structure remains flexible after curing, forming a resistant film that can move with walls and the surface. This flexibility helps elastomeric wall coatings bridge hairline cracks during small cycles of expansion and contraction. Check Promain product data for application temperature and tested movement performance.
Proper surface preparation before using Promain products
Promain recommends careful preparation before any elastomeric wall coating is applied. Remove dirt, dust, algae, loose material and failed paint. Repair damaged areas, fill appropriate cracks and allow the surface to dry. The substrate should be stable before primer or wall coating application, especially on previously painted surfaces.
When is a primer needed?
Promain stocks primers for porous, repaired and difficult surfaces where the chosen elastomeric coating system requires one. A primer can control suction, improve adhesion and help the finish form evenly. Always pair the primer with the specified Promain coating system rather than mixing incompatible products.
Brush, roller or spray application
Promain elastomeric wall coatings may be applied by brush, roller or spray depending on the product. Professional application can suit large exterior walls. Follow the stated spreading rate, equipment and coats to achieve the intended film build.
Product data will show whether the system needs two coats over primer or a different sequence. Correct dry film thickness and curing conditions are important for best performance.
When not to use elastomeric paint
Promain would not recommend elastomeric paint over wet, weak or contaminated walls, or as a way to conceal serious structural movement. Avoid application when weather conditions fall outside the product limits. If moisture is entering from roofs, gutters, ground or defective joints, repair the source before creating a new exterior wall finish.
Acrylic exterior paint or elastomeric paint?
Promain stocks both standard exterior paint and elastomeric paint, so the choice should follow the condition of the wall. Standard exterior paint can suit stable masonry with little movement. Elastomeric paint is better suited where greater film build, crack bridging or rain resistance is needed. The initial total cost can be higher, but added durability may make an elastomeric wall coating cost effective where repeated repairs would otherwise be required.
How durable are elastomeric wall coatings?
Promain's range includes durable elastomeric coatings for different exposures. General industry references often quote 10 to 15 years for maintained systems, but there is no single lifespan for every product. Check any superior durability claim against manufacturer testing and maintenance guidance.
Dirt, mould and algae resistance
Promain stocks elastomeric coatings with different resistance properties. Mapei Elastocolor Pittura Zero is described as resistant to algae, mould and fungi, helping limit mold growth on treated surfaces. Regular cleaning and timely repair still help preserve the coating and attractive appearance.
Elastomeric coatings for coastal and wet locations
For coastal and exposed sites, Promain can supply systems designed for moisture, wind driven rain and harsh weather. Fosroc Dekguard E2000 is intended for exposed concrete structures including coastal environments. In such an extreme environment, Promain recommends choosing coating systems with documented resistance rather than assuming all elastomeric wall products perform the same way.
Best elastomeric wall coatings from Promain
The best elastomeric wall coatings depend on the surface and exposure. Promain stocks Rust-Oleum Murfill Renovation Paint for flexible waterproof façade protection, Bedec Extra Flex for exterior masonry and render, Mapei Elastocolor Pittura Zero for crack-bridging concrete protection and Fosroc Dekguard E2000 for concrete and masonry.
How Promain can help you choose an elastomeric coating system
Start with the building, walls, substrate and cracks, then form the specification around the actual defects. Promain can help compare adhesion, water resistance, crack bridging, UV resistance, thickness and application method. For masonry surfaces, vapour behaviour should also be considered. Our technical team can help building owners, contractors and specifiers select suitable elastomeric coating systems for demanding walls.
Are elastomeric coatings cost effective?
A high-build wall coating may use more material and professional application can increase upfront cost. Surface repairs also affect total cost. Promain can help identify whether the system is justified. Where exterior walls need a weatherproof finish, longer maintenance intervals can make elastomeric wall coatings cost effective over time.
Are elastomeric wall coatings eco friendly?
Promain supplies some water-based elastomeric coatings with low VOC content. Eco friendly performance is product-specific, so check the selected product's VOC and environmental information.
Maintaining elastomeric exterior wall coatings
Promain recommends inspecting exterior wall coatings for damage, new cracks and water ingress. Clean dirt and repair defects promptly. Maintenance depends on rain, UV exposure, moisture and harsh weather affecting walls and the building.
Order elastomeric wall coatings from Promain Paints
Promain supplies elastomeric wall coatings, exterior coatings, primers and related coating systems for walls of masonry, render, stucco and concrete. Browse the Promain range above or contact our technical team for help matching an elastomeric wall coating to your substrate, exposure and required durability.