Design Engineering High-Temperature Silicone Coating Spray 12 oz aerosol — 1500°F heat-resistant, quick-drying flexible barrier

Design Engineering’s High-Temperature Silicone Coating Spray is a heat-resistant sealant formulated to protect exhaust wraps, manifolds, and other hot surfaces from oil, grime, abrasion and thermal stress up to 1500°F.

This aerosol silicone coating was developed to extend the life and performance of heat-management components on vehicles and industrial equipment. It forms a flexible, durable barrier that bonds to exhaust wraps and metal surfaces, improving resistance to contamination and mechanical wear while helping preserve thermal insulation. The spray is quick-drying, compatible with Design Engineering wraps and many other materials, and designed to be straightforward to apply for enthusiasts and pros alike.

How does this coating protect exhaust wraps and hot parts?

The silicone formulation penetrates and seals the surface fibers of exhaust wrap and creates a continuous, abrasion-resistant layer over metal parts. That barrier helps keep oil, dirt, and road grime from degrading the wrap’s fibers and reduces flaking or fraying under vibration.

• Forms a flexible, abrasion-resistant skin over wraps and metal.
• Blocks contaminants that accelerate wear and fiber breakdown.
• Helps maintain wrap integrity under repeated temperature cycles.

What temperatures and conditions will it withstand?

The spray is engineered for extreme heat situations common around exhaust systems and hot engine components. It tolerates sustained high temperatures and resists cracking or peeling when exposed to thermal cycling and vibration.

• Rated for extreme heat exposure up to 1500°F in typical exhaust applications.
• Maintains adhesion through rapid heating and cooling cycles.
• Designed to resist degradation from oil, grime and road contaminants.

How do I apply the 12 oz. aerosol for best results?

Preparation and heat-curing are key: clean and dry the surface, spray thin even coats, and follow a staged cure process. The product cures with heat; multiple coats with heat cycles between them create a tough, long-lasting finish.

• Shake can well, remove loose debris and degrease surfaces before spraying.
• Apply at least three light coats, allowing a heat cycle between coats for proper cure.
• Cures at higher temperatures (about 400°F) within a couple of hours when properly heated.

Will this work with other materials and finishes I already have?

Yes — the coating was formulated to be compatible with Design Engineering exhaust wraps and to bond to many metal surfaces. It’s suitable for headers, manifolds, starters, grills and other hot components, though testing on small areas is recommended for specialty coatings or painted surfaces.

• Compatible with most heat-resistant wraps and bare metal surfaces.
• Can be used on headers, engine blocks, manifolds and exhaust components.
• Test a small inconspicuous area when applying over existing paints or coatings.

Who is this for: This high-temp silicone coating is intended for automotive enthusiasts, professional mechanics and maintenance teams who need to protect exhaust wraps and hot metal parts from contaminants and wear. It’s a practical choice for anyone maintaining performance vehicles, restoring classic cars, upgrading exhaust systems, or protecting industrial equipment exposed to intense heat. If you want a straightforward aerosol solution that improves durability and simplifies upkeep for heat-exposed components, this product provides a durable, heat-tolerant option made in the USA.