Alkali-Free Wax-Free Fiberglass Tape
Alkali-Free Wax-Free Fiberglass Tape is built from Alkali-free fiberglass. It is a non-shrink sleeve you slip over the part; it stays in place by fit and friction, with no heating step. Buyers spec it for Transformer and CT coil reinforcement — the typical call is a sized part that stays put through vibration, thermal cycling and field handling. Below is the spec table, the size matrix we keep in stock, and the selection notes our engineering team uses when a purchaser sends a cable or component drawing.
Specification
| Material | Alkali-free fiberglass |
|---|---|
| Shrink ratio | Non-shrink |
| Colors | White |
| Note | Tensile >=0.7 N/tex |
What it is and how it recovers
Alkali-Free Wax-Free Fiberglass Tape is a braided or wrapped sleeve that goes on by sliding. It holds by friction and the spring of the weave, so there is no recovery step and no heat. Because the body is Alkali-free fiberglass, it keeps its insulation and protection through handling and thermal cycling. For procurement this matters: the part you receive is reusable on the bench, but once installed it stays put for the life of the assembly.
Where Alkali-Free Wax-Free Fiberglass Tape is used
Primary applications: Transformer and CT coil reinforcement.
How to select the right size
Specifying Alkali-Free Wax-Free Fiberglass Tape is mostly about matching three numbers to the part you are covering:
- Recovered vs. supplied diameter. Pick the supplied (expanded) ID at least Non-shrink× the object's largest diameter so the sleeve slides on, then confirm the recovered ID grips it. When in doubt, size up one step rather than forcing a tight fit.
- Wall and adhesive. Thin wall for tight harness bundles; medium/thick wall or adhesive-lined (dual-wall) where you need environmental sealing or abrasion resistance. We keep both in stock.
Common Failure Modes & How to Prevent Them
Drawing on field reports and our engineering team's experience, these are the most common issues installers and buyers report when working with Alkali-Free Wax-Free Fiberglass Tape. Each entry shows the symptom, the root cause, and the fix we recommend on the bench and in the field.
The wrap unravelled after months
A user: "the tape came loose and unravelled."
Root cause: Too little overlap or wrong tension lets a wrap relax and peel.
Fix: Wrap with at least 50% overlap and steady tension. For self-amalgamating silicone tape, stretch it so the layers fuse into one solid mass - layered but not fused fails.
Silicone tape never fused
"I laid it on and it stayed as separate layers."
Root cause: Self-amalgamating tape only seals if stretched and overlapped so the surfaces merge.
Fix: Pull it tight, overlap 50%, and rub down. It should come out as one piece, not a stack of ribbons.
The foil tape was for shielding, not just wrap
"I used aluminium foil tape as a general wrap and missed the point."
Root cause: Aluminium foil tape's job is EMI shielding and reflective heat, not primary insulation.
Fix: Use it where you need a conductive, reflective layer, and bond it to a ground. Don't rely on it for dielectric strength.
The varnish sleeve was for coil binding
"The yellow wax tube is for coil insulation, not a cable loom."
Root cause: A varnish-impregnated braided sleeve is built for motor and transformer coils, not as a harness cover.
Fix: Use it where impregnation and bond matter - coils, bobbins, lacing. For cables, a braided or heat-shrink sleeve fits better.
Common Failure Modes & How to Prevent Them
Drawing on field reports and our engineering team's experience, these are the most common issues installers and buyers report when working with Alkali-Free Wax-Free Fiberglass Tape. Each entry shows the symptom, the root cause, and the fix we recommend on the bench and in the field.
The wrap unravelled after months
A user: "the tape came loose and unravelled."
Root cause: Too little overlap or wrong tension lets a wrap relax and peel.
Fix: Wrap with at least 50% overlap and steady tension. For self-amalgamating silicone tape, stretch it so the layers fuse into one solid mass - layered but not fused fails.
Silicone tape never fused
"I laid it on and it stayed as separate layers."
Root cause: Self-amalgamating tape only seals if stretched and overlapped so the surfaces merge.
Fix: Pull it tight, overlap 50%, and rub down. It should come out as one piece, not a stack of ribbons.
The foil tape was for shielding, not just wrap
"I used aluminium foil tape as a general wrap and missed the point."
Root cause: Aluminium foil tape's job is EMI shielding and reflective heat, not primary insulation.
Fix: Use it where you need a conductive, reflective layer, and bond it to a ground. Don't rely on it for dielectric strength.
The varnish sleeve was for coil binding
"The yellow wax tube is for coil insulation, not a cable loom."
Root cause: A varnish-impregnated braided sleeve is built for motor and transformer coils, not as a harness cover.
Fix: Use it where impregnation and bond matter - coils, bobbins, lacing. For cables, a braided or heat-shrink sleeve fits better.
Frequently asked questions
Why use Alkali-Free Wax-Free Fiberglass Tape instead of heat-shrink tubing?
Heat-shrink polyolefin degrades above roughly 125 °C. This Alkali-free fiberglass sleeve holds its rated temperature range continuous, so it survives engine-bay radiant heat, exhaust proximity and industrial ovens that would destroy tubing.
Can I install it without taking the harness apart?
Yes — it is a slip-on sleeve, so you can route it over connectors, bundles and assembled looms without unplugging anything. Heat shrink, by contrast, must be threaded on before termination.
How does it protect against abrasion and flexing?
The braid/woven Alkali-free fiberglass structure absorbs vibration and resists cut-through and abrasion far better than thin-wall tubing, which is why it is used on moving harnesses and cable trays.
Is it the right choice versus a silicone or fiberglass option?
For pure high heat, fiberglass/silicone-coated grades win; for flexibility and bundling, textile/braided sleeves win. Tell us the temperature, motion and exposure and we match the construction.
What certifications back it ()?
Compliance is ; certificates supplied per batch. For a bid we align documentation to your market.
What sizes and colours are available?
We keep a range of IDs and can supply custom cut lengths and colours (including high-visibility) for production lines; send the bundle OD and we size it.
Why did my tape unwrap?
Too little overlap or wrong tension. Wrap with at least 50% overlap and steady tension.
How do I apply self-amalgamating tape?
Stretch it and overlap 50% so the layers fuse into one solid mass; layered but not fused fails.
What is aluminium foil tape for?
EMI shielding and reflective heat, not primary insulation. Bond it to a ground path.
What is the varnish (yellow wax) sleeve for?
Coil, bobbin, and lacing insulation in motors and transformers - not a cable loom.
Request a quote for Alkali-Free Wax-Free Fiberglass Tape
Tell us the inner diameter, wall type, length and quantity you need, plus the voltage class and environment. We return a sized part number, stock status and lead time — no price guessing, no minimum-order surprises.
Size range & specification notes
抗拉强度≥0.7N/tex