Silicone

man pouring white waterproof paint from bucket in container at roof.

Silicone Elastomeric Roof Coatings

Ultima Coatings supplies high-performance silicone elastomeric roof coatings designed to deliver long-lasting waterproofing, UV resistance, and weather protection in extreme environments. These coatings form a seamless, flexible membrane that protects roof surfaces from ponding water, thermal movement, and long-term exposure to harsh climate conditions.

Engineered for durability and ease of application, silicone elastomeric coatings provide excellent adhesion to a wide range of substrates while maintaining elasticity over time. Ideal for both new construction and refurbishment projects, they offer a reliable solution for extending roof life and reducing maintenance costs.

Product Range

HarcoSil® 19-97

A high-solids silicone roof coating formulated for superior waterproofing and UV resistance. HarcoSil® 19-97 delivers excellent flexibility, allowing it to accommodate structural movement without cracking or peeling.
Key Benefits:

  • Outstanding resistance to UV and weathering

  • Excellent performance under ponding water

  • Long-term elasticity and durability

Ideal for:
  • Flat roofs
  • Exposed roof areas
  • Refurbishment projects
waterproofing coating with a roller brush.
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HarcoSil® 29-97

A premium high-performance silicone elastomeric coating designed for enhanced durability and protection. HarcoSil® 29-97 provides superior thickness build and long-term resistance in demanding roofing environments.
Key Benefits:

  • High build for extended service life

  • Strong adhesion to multiple substrates

  • Maintains flexibility in extreme temperatures

Ideal for:
  • High-exposure roofs
  • Heavy-duty waterproofing applications

Harseal® 1959 – Flashing Grade

A high-build silicone flashing material designed for detailing and reinforcement. Harseal® 1959 creates a seamless, watertight seal around penetrations, joints, and transitions.
Key Benefits:

  • Excellent crack-bridging capability

  • Ideal for complex roof details

  • Compatible with silicone roof coating systems

Ideal for:
  • Flashings
  • Penetrations
  • Edges
  • Roof transitions.
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Why Choose Silicone Elastomeric Roof Coatings by Ultima Coatings

A complete silicone roofing solution engineered for long-term performance in harsh climate conditions.

Seamless, joint-free waterproofing

Exceptional UV and weather resistance

Flexible and durable under thermal movement

Suitable for new builds and refurbishment

Supported by expert technical guidance