TDS

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Product Data Sheet
Masking
The use of masking tape is recommended where appropriate to ensure a neat job and to protect adjoining surfaces from over-application of
sealant. Masking tape should be removed immediately after tooling the sealant and before the sealant begins to skin over (tooling time).
Instructions
1. Remove dirt, grease, moisture, soap residue & old caulk from area to be sealed. Use backer rod for gaps larger than
1
/2” x
1
/2”
(12.7mm x 12.7mm)
1)
.
2. Cut nozzle to obtain desired bead size.
3. PIERCE INNER FOIL SEAL.
4. Using caulk gun, apply sealant into gap. Smooth the sealant into gap.
5. Wipe hands & tools thoroughly before washing.
6. Allow a mimimum of 30 minutes before exposing sealant to water.
(1) Sealant depth should be controlled with a closed cell, non- gassing type backer rod. Backer rod should be slightly larger in diameter (25 to 50%) than the joint width.
Sealant Application
• Apply sealant in a continuous operation applying a positive pressure adequate to properly ll and seal the seam, cavity or joint.
• Tool or strike the sealant with a concave tool, applying light pressure to spread the material against the joint surfaces to ensure a void-free
application.
• When tooling, use care not to spread the sealant over the face of the substrates adjacent to the joint or masking as the silicone can be
extremely dicult to remove on rough or porous substrates. Excess sealant should be cleaned from glass, metal and plastic surfaces while
still uncured. On porous surfaces the excess sealant should be allowed to progress through the initial cure or set-up. It should then be
removed by abrasion or other mechanical means.
• If sealant is applied when the temperature is below 32°F (0°C) or if frost or moisture is present on the surfaces to be sealed, the rate of cure
will slow. For standard cure speed, apply in temperatures above 32°F.
• The cure rate of this product is dependent upon temperature and the availability of atmospheric moisture. Under average conditions
(relative humidity of 50 ±5% at an air temperature of 73.4 ±2°F [23 ±1°C]) this material can attain a cured thickness of 2-3 mm per 24 hours
(assuming ample access to atmospheric moisture). As temperature decreases, the cure rate slows down (and vice versa). Low moisture
environments will also reduce the cure rate. Near-conned spaces, which limit the overall access to atmospheric moisture, will generally
allow cure only at that surface which has access to the atmosphere.
Note:
• This material requires atmospheric moisture to cure from paste to rubber and may not attain its listed nal cured rubber properties when
used in designs or applications where the silicone is encapsulated and without access to atmospheric moisture.
• Some materials that bleed plasticizers or oils can cause a discoloration on the surface of sealants. When sealing to or over items such as:
rubberized gaskets, bituminous based materials, butyl or oil-based products, oily woods, tapes, etc., compatibility testing prior to use
is recommended.
• Silicone materials are hydrophobic in nature and if inadvertently over-applied onto adjacent joint surfaces (even if removed immediately),
can create a waterproong eect of a substrate when the substrate is wet. See section on Masking.