Thermopel 403

Office Hours
Monday - Friday: 09:00 - 17:00
Our Location
Santa Rosa Beach, Florida
Customer Support
1 (850) 534-0499


This waterborne, 100% acrylic elastomeric coating is designed for use on concrete, brick, stucco, plaster, and mortar, and is composed of natural active components made right here in the USA. Thermopel® 403 is heat- and moisture-resistant, and has consistently proven to outlast the competition. It will save up to 30 percent on cooling costs and pay for itself in about six months—then keep reducing energy costs for up to 15 years. Product of the USA.


Thermopel 403 is a 100% acrylic waterborne high-build elastomeric coating that fills and bridges minor hairline cracks. Thermopel 403 Acrylic Elastomeric Coating, 403S (smooth) or Thermopel 403TX (textured), provides long-term protection against driving rain and alternate freezing and thawing. It has excellent resistance to long-term exposure to sunlight and will allow moisture vapor to escape from the substrate. It will expand and contract, conforming to minor substrate movements even at temperatures below freezing.

For use as a coating for new and existing concrete, concrete block, poured and preset concrete, brick, stucco, and steel substrates. Thermopel 403 Acrylic Elastomeric coating contains rust-inhibitive pigmentation and is suitable for interior and exterior surfaces.

Do not apply below 40°F (4°C). Keep from freezing. The surface must be clean and structurally sound, free of all contaminants such as release agents, oil, grease, algae, laitance, and chalk. Do not use below grade. Coverage must be pinhole-free to achieve waterproofing.

Price available upon request.

Learn How to Purchase