Design Engineering High-Temperature Silicone Coating Spray 12 oz — 1200°F Heat Resistant, Oil-Repellent Protectant

Design Engineering High-Temperature Silicone Coating Spray is a silicone-based aerosol sealant that protects exhaust wraps and hot metal surfaces, rated to withstand extreme heat up to 1200°F while resisting oil, dirt, and abrasion.

When exhaust wraps and hot engine components face repeated heat cycles, road contaminants, and mechanical wear, they need a sealing finish that holds up. This 12 oz. aerosol from Design Engineering penetrates and bonds to heat wraps and compatible metal parts to create a durable, protective barrier. The formula is engineered to reduce contamination, delay degradation, and improve the usable life of heat-management systems without altering fit or flexibility.

How does this spray improve the lifespan of exhaust wraps?

The silicone-based coating seals fibers and blocks contaminants that accelerate wear—such as oil, grime, and moisture—so wraps retain their insulating properties longer. It also resists cracking and peeling under thermal stress, preserving the wrap’s integrity through repeated heating cycles.

• Penetrates and bonds to wrap fibers to reduce fraying and breakdown
• Creates a dirt- and oil-repellent surface for easier cleaning
• Reduces abrasion from contact with other components

What temperatures and curing steps are required for reliable performance?

The product is formulated to withstand extreme temperatures up to 1200°F once fully cured. For best results, apply multiple light coats and follow a heat-cycling procedure so the silicone cures evenly and achieves maximum durability.

• Rated heat resistance: up to 1200°F after curing
• Cures at approximately 400°F; allow heat cycles between coats
• Recommended application: at least three coats with full cure time per cycle

Which parts and materials are compatible with this coating?

This coating was formulated with Design Engineering exhaust wraps in mind but is also suitable for many hot metal surfaces found in automotive and industrial settings. It’s ideal for headers, manifolds, engine blocks, and other components where heat management and contamination resistance are important.

• Designed for DEI exhaust wraps and similar high-temp textiles
• Safe for use on headers, manifolds, starters, and engine housings
• Helps protect metal surfaces from grime and minor abrasion

How easy is it to apply, and what should I expect during use?

The spray format makes spot or full-coverage application straightforward. Light, even passes followed by a controlled heat cure produce the best adhesion and longevity; avoid heavy wet coats that can run or take longer to cure.

• Comes in a 12 oz. aerosol for convenient spraying
• Apply in thin, overlapping coats for even coverage
• Allow a heat cycle between coats for proper curing and performance

Who is this for? Automotive professionals, mechanics, and enthusiasts who rely on exhaust wraps and hot-end components for thermal management will benefit most from this coating. It’s also useful for DIYers maintaining older vehicles or building performance engines who want to extend wrap life, reduce contamination, and maintain a cleaner engine bay. Made in the USA, the spray gives a practical protective option where heat resistance, dirt repellency, and abrasion protection are needed without permanent alteration of the wrapped parts.