Marl Neutral-Cure Sealant 300 ml
Neutral silicone for glass, metal and stone
$12.00
USDStandard shipping $9.00, free over $85. Arrives in 3–6 business days. 30-day returns.
A neutral-cure silicone for perimeter sealing around glass, metal frames, stone and mirrors. Neutral-cure rather than acetoxy: it does not release acetic acid as it cures, so it will not corrode metal frames or etch natural stone, and it does not smell of vinegar in a closed room.
It is a movement joint sealant, not an adhesive. It is rated for continuous movement of about a quarter of the joint width, which is what a properly sized joint needs and what a thin smear over a crack cannot deliver.
Working load limits
What this item holds, in the material you are fixing into. Every figure is a working load — the safety factor is already taken out.
Safety factor4:1 — every figure below is the tested mean divided by four.
| Substrate / condition | Working load | Notes |
|---|---|---|
| Movement capability, correctly sized joint | ±25% of joint width | The joint must be at least twice as wide as it is deep for this to hold. |
| Glass to anodised aluminium, 6 mm joint | 22 lb per linear foot | Tension across the joint after full cure. A weatherseal figure, not a structural one. |
| Service temperature range, cured | -40°F to 300°F | Continuous. Cure below 40°F is impractically slow. |
How these were arrived at
Movement capability from a standard cyclic joint test; the adhesion figure was measured on 50 mm bonded samples after 14 days at 68°F. Skin time is 12 minutes and full cure is roughly 2 mm of depth per day, so a deep joint takes considerably longer than a shallow one.
The specification
Everything we know about this item, stated plainly. The same record is printed on the card in the box.
- Composition
- Neutral alkoxy-cure silicone with fungicide. Translucent. Also available in white and grey on request.
- Dimensions
- 300 ml cartridge. A 6 mm joint runs roughly 27 feet; a 10 mm joint roughly 10 feet.
- Weight
- 440 g filled.
- Finish & variation
- Cures to a flexible translucent rubber. It is not paintable — no paint adheres to cured silicone, and this is the property that makes people choose the wrong sealant for a joint they intend to paint.
- Made
- Formulated and filled in Ohio. Every cartridge is date-stamped on the crimp with the batch and the month of manufacture.
Care
- Store upright between 40 and 80°F, out of direct sun.
- Cut the nozzle to the bead you actually want; you cannot make it smaller afterwards.
- Wipe the nozzle and cap it — a cured plug wastes more product than the job used.
- Tool the joint within 12 minutes, before the skin forms.
Cautions
- Not paintable, ever. Nothing adheres to cured silicone. If the joint needs paint, it needs an acrylic sealant instead.
- Not a structural adhesive and not a gap filler. A movement joint has to be designed and sized; silicone smeared into a crack will split again at the first cycle.
- Not for use on a surface that will later be sealed with something else. Silicone residue contaminates the substrate permanently and nothing will bond to it afterwards.
- Not for continuously submerged joints or for bituminous surfaces.
Shipping
$9.00 standard, free over $85. 3–6 business days. Full policy
30 DAYS
Returns
Unused and in original packaging. Refunded within 5 business days of reaching us. Full policy
Questions about this product
help@livwellhardware.comEvery message answered within one business day.
