“HeatShield” by SaverSystems is a chimney repair / restoration system / product line that helps restore and seal damaged flue liners, fill cracks, gaps, or deteriorated mortar, and resurface the interior of chimneys.
Here are the key points about it:
What HeatShield Does
It restores the integrity of the chimney’s flue liner so that hazardous gases (smoke, CO, etc.) are safely vented instead of leaking into the building.
It addresses defects such as cracked clay tiles, spalled or eroded surfaces, gaps, holes, or failing mortar joints.
It offers two main methods: • Joint repair — filling individual voids or defective mortar joints • Resurfacing — applying a “liner coating” across the entire internal surface of the flue to re-seal it (“slip casting”)
Technology / Materials
The core material is a hybrid “Cerfractory” coating, which combines high-fired ceramic strength and refractory heat resistance.
When used with the CeCure Sleeve, the system is UL-1777 certified as a chimney liner (by Intertek)
The system exceeds the duty requirements of many building codes (IRC, NFPA) — it is rated as “Super-Duty” in testing.
How It Is Installed / Applied
For resurfacing, a custom foam plug is placed in the flue and is winched upward. A “tie coat” is applied first as a primer/cleaning layer, then the Cerfractory material is applied via slipcasting (pulled upward as the plug moves).
The entire interior surface is coated, so even small hidden cracks or porous spots are sealed.
After application, the repair is verified using camera inspection to ensure voids are sealed and there are no defects.
Benefits & Considerations
It’s typically less destructive (doesn’t require removing or tearing out masonry) compared to full liner replacement.
It can be used to repair or strengthen chimneys that are otherwise structurally sound, avoiding full rebuilds in some cases.
It is compatible with solid fuel, gas, oil, etc., when properly applied.
It must be done by a qualified installer, following proper procedure, thickness, inspection, etc.
Since the system contains refractory materials (including silica), it has safety & handling requirements (gloves, masks, following SDS).
