Is THERMOSLEEVE S fiberglass thermal sleeve safe for continuous use at +538Â°C and what precautions are needed for short-term exposure up to +705Â°C?

Yes. THERMOSLEEVE S fiberglass thermal sleeve is safe for continuous use at +538Â°C . that is its rated operating temperature. For short-term exposures up to +705Â°C it may be used, but observe these precautions: - Limit duration: restrict high-temperature excursions to short periods as specified by the âtemporarilyâ rating to avoid progressive degradation of the acrylic binder and reduced mechanical integrity. - Thermal cycling care: minimize the number and severity of cycles between ambient and peak temperatures to reduce cracking or embrittlement of the coating. - Mechanical protection: protect the sleeve from sharp edges, excessive abrasion and compressive loads at elevated temperatures; the acrylic-saturated braid is more susceptible to damage when heated. - Secure fit and allowance: use the sleeveâs Â±25% expansion/contraction capability to achieve a snug fit without overstretching; avoid continuous compressive deformation at max temperature. - Inspection and replacement: inspect regularly after high-temperature events for discoloration, loss of shape, stiffness changes or fiber exposure; replace if any degradation appears. - Avoid chemical exposure: keep away from aggressive chemicals or oils at high temperature that could damage the binder or promote embrittlement. - Ventilation and safety: ensure adequate ventilation and follow workplace high-temperature safety procedures (PPE for hot surfaces, heat shields) since the sleeveâs binder may emit fumes during extreme or repeated heating. Following these precautions will help maintain performance and safety when using THERMOSLEEVE S at or briefly above its rated temperatures.

Can THERMOSLEEVE S fiberglass thermal sleeve be repeatedly expanded/contracted by 25% without losing insulation or durability?

Yes. THERMOSLEEVE S fiberglass thermal sleeve is designed to be expanded and contracted by up to 25% to fit the desired diameter without losing insulation performance or durability. Made from specially cleaned fiberglass braid heated and saturated with a special acrylic substance, it resists loose fibers, lays neatly, and offers relative abrasion resistance. Its construction tolerates repeated 25% expansions/contractions while maintaining thermal integrity up to +538Â°C (temporarily up to +705Â°C). Normal mechanical wear or extreme abrasion may eventually affect lifespan, but routine 25% flexing alone should not compromise insulation or durability.

Can THERMOSLEEVE S fiberglass thermal sleeve resist chemical exposure or oils at high temperatures?

THERMOSLEEVE S fiberglass thermal sleeve offers excellent high-temperature resistance (continuous up to +538Â°C, short-term to +705Â°C) and is made from specially cleaned fiberglass braid saturated with a protective acrylic substance. This construction gives it good dimensional stability, abrasion resistance, and a compact, non-shedding surface. However, fiberglass with an acrylic saturation provides limited chemical resistance. THERMOSLEEVE S will resist many common oils and incidental contact with non-aggressive contaminants at elevated temperatures, but prolonged exposure to strong acids, alkalis, solvents, or aggressive chemical vaporsâespecially at high temperaturesâcan degrade the acrylic binder and attack the glass fibers, reducing mechanical integrity and thermal performance. Oils at high temperatures can also cause staining, softening of the acrylic layer, or promote faster aging, depending on oil chemistry and exposure duration. Recommendation: For occasional or incidental oil contact and non-corrosive environments, THERMOSLEEVE S is generally suitable. For continuous immersion or exposure to aggressive chemicals, solvents, or prolonged hot oil contact, choose a sleeve specifically rated for chemical resistance (e.g., silicone-, PTFE-, or polymer-coated high-temp variants) or consult the manufacturer with the exact chemicals, concentrations, temperatures and exposure times to confirm compatibility.

THERMOSLEEVE S fiberglass thermal sleeve

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Additional information

Maximum operating temperature [°C]	538

Thermal insulation made from specially cleaned fiberglass braid through heating and saturation with a special acrylic substance. It does not have loose, falling fibers, lays well, and is relatively abrasion-resistant. It can be expanded and contracted by 25% to fit the desired diameter. Material: fiberglass. Operating temperature: up to +538°C (temporarily up to +705°C).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
FQ-TSS-10	THERMOSLEEVE S 16 mm thermal insulation cover	-	-	In stock	Enquiry
FQ-TSS-14	THERMOSLEEVE S 22 mm thermal insulation cover	-	-	In stock	Enquiry
FQ-TSS-22	THERMOSLEEVE S 35 mm thermal insulation cover	-	-	In stock	Enquiry
FQ-TSS-44	THERMOSLEEVE S 70 mm thermal insulation cover	-	-	In stock	Enquiry

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Thermal insulation made from specially cleaned fiberglass braid through heating and saturation with a special acrylic substance. It does not have loose, falling fibers, lays well, and is relatively abrasion-resistant. It can be expanded and contracted by 25% to fit the desired diameter. Material: fiberglass. Operating temperature: up to +538°C (temporarily up to +705°C).