HTP-100 can be deposited on metal, refractory, advanced ceramics, and thermally stable polymeric substrates. Regardless of the type of substrate, minimal surface prep is required. HTP-100 has the primer embedded in the paint formulation, offering a simple one-layer deposition. The coating also results in a hermetic quality seal at the interface between coating and substrate. With HTP-100, no metallurgical bondcoat is needed as phosphate bonding provides robust chemical bonding to the substrate and serves as an effective diffusion barrier against moisture, oxygen, hydrogen, and molten metals.


Ferrous Alloys

The use of different grades of steel throughout heavy industrial plants is dictated by material capabilities and economics. HTP-100 coated low grade and inexpensive ferrous alloys typically outperform their higher-grade counterparts, thus offering opportunities for OEMs to lower capital costs by using inexpensive ferrous alloys.

Common uses include:

  • Preventing Molten Metal Corrosion
    • HTP-100 is stable against non-ferrous molten metals such as aluminum and magnesium which can accelerate corrosion of steels. HTP-100 is a "non-stick" coating.
  • Preventing surface carburization
    • HTP-100 is an effective diffusion barrier against carburization in hydrocarbon gas environments at elevated temperatures.
  • Preventing Steam Corrosion
    • High temperature steam can cause rapid corrosion of ferrous alloys. HTP-100 serves as an effective high temperature diffusion barrier against steam.

Other Alloys

Nickel and titanium alloys are used for specialty high temperature applications, particularly in the aerospace sector. Protection of these alloys while offering high emissivity characteristics is essential for thermal management. HTP-100 is an effective barrier against oxidation and stable under vacuum conditions without outgassing and thus retains its emissivity.


Ferrous Alloys


Molten Aluminum Casting

Non-stick nature of HTP-100 demonstrated on 304 stainless steel, submerged in molten aluminum for 1 hour at 1400°F.


High Temperature Service

High temperature capabilities demonstrated on 430 stainless steel sheets in humid air for 24 hours at 1800°F, preventing alloy oxidation.

 substrates_ferrousalloys_demos.jpg Carbon Steel (AISI 4140)

Hermetic seal of HTP-100 demonstrated on 4140 carbon steel, exposed to ambient air at 1000°F for 17 hours. No oxidation observed on coated side.

Other Alloys

High Temperature Service

Superalloy oxidation protection demonstrated on Inconel 625, coated and exposed to humid air for 1000 hours at 1800°F, showing no oxide scale formed.



Inconel 625 - Uncoated

Uncoated IN 625 after 1000 hours at 1800°F in ambient air (SEM and camera image shown).


Inconel 625 - HTP-100 Coated

HTP-100 coated IN 625 after 1000 hours at 1800 °F in ambient air (SEM and camera image shown).


Lower-Cost Refractories

  • Industrial refractory ceramics are used as thermal insulators and chemical barriers in industries such as fertilizer production, cement manufacturing, and metal casting, with various compositions and porosities depending on end use.
  • High alumina content, dense refractories have the best corrosion resistance and thermal stability of all refractories, but they are expensive.
  • Insulating fire bricks (IFBs) are much cheaper, are better thermal insulators, and are easier to machine and install, but are highly porous and are more susceptible to degradation at high temperatures.
  • HTP-100 protects IFBs from chemical degradation, enabling the use of these low-cost materials in demanding environments, such as molten chloride salts at 1500°F.

Energy Savings

  • A further benefit of applying HTP-100 on refractory ceramics is its high emissivity, which allows the coating to re-radiate heat into the process, generating energy savings and improving thermal uniformity over the refractory surface, thereby preventing hot spots.

Abrasion Resistance

  • The combination of chemical corrosion and mechanical erosion means that refractory ceramics must be replaced frequently due to material loss. HTP-100 protects against both corrosion and erosion, with a mechanically tough and hard coating for long term durability. HTP-100 can withstand typical tool drop impacts.

Chemical Durability

  • Most coatings for industrial refractories are high-pH silicate coatings, which can be hazardous to handle and will react with refractories and the environment at high temperatures, leading to degradation of both the coating and the refractory. HTP-100 is an inert coating that is stable up to 1800°F, due to its highly stable aluminum phosphate matrix.

Crack Sealing

  • HTP-100 can be used to seal cracks in refractory bricks, which can develop over time due to sintering and hot corrosion. HTP-100 is easily applied during maintenance shutdowns, and, once dried, can be cured in service.



Molten Salt Exposure

Compatibility of HTP-100 with molten salts demonstrated by exposing coating to molten chloride salt at 1500°F for 72 hours, with no coating degradation.

Specialty Substrates - OVERVIEW

HTP-100 is an all-purpose coating, and our customers are continuing to find new ways in which it can solve high-temperature and extreme environment material challenges.


HTP-100 can serve as a high-temperature adhesive in certain applications. It can be sprayed on both mating surfaces, which are then joined and fired to 570°F to achieve a durable high temperature joint capable of 1800°F, with at least 100 psi adhesive bond strength.



While welds and brazes can corrode under ambient atmospheric conditions, they are highly susceptible to corrosion in high-temperature plant infrastructure due to their complex morphology and metallurgy. HTP-100 can provide effective galvanic corrosion protection under ambient conditions, and it is especially effective in protecting welds and brazes at high temperatures, where rapid oxidation can weaken the joint significantly 


Coated (left) and uncoated (right) 316 stainless steel weld joints, 72 hours at 1500°F in ambient air, with 3 thermal cycles – coating remained intact and protected substrate from oxidation.