12/8/2023 0 Comments Duct seal putty plastic![]() ![]() This slow flow manifests itself in sagging over time, which is another way for the material to separate from the top of the conduit wall and break seal integrity (see Figure 1). While it may move very slowly, putty does flow under the force of gravity. Sometimes the shrinkage results in cracks in the body of the seal itself, again breaking the seal and allowing ingress of water, gas, and other contaminants.Īnother problem is that while the volatile content is still present, the putty is essentially a thick liquid. The shrinking sealant pulls away from conduit walls and/or cable jackets, opening a pathway for water, gas, dirt, insects, snakes, rodents, fire ants, etc. Too often, initial installation results in no seal at all.Įven with adequate installation, when duct putty’s volatile content evaporates, it causes shrinkage that results in gaps. Even a rudimentary seal is difficult to craft. It is very sticky and hard to manipulate. Putty comes with no instructions on how much to use or how to properly seal a conduit. ![]() Related Content: Is Meeting a Standard Enough?-An Examination of Duct Sealing Code Compliance.Īpplication is one cause of failure. Specifiers and engineers should understand that this is problematic for reliable cable installations because duct putty fails as a long-term sealant solution. Certainly, it is frequently used as such. ![]() Despite this, duct putty is often recommended for and marketed as a conduit sealant. In the case of duct putty, the UL mark is generally for sealing junction boxes, not conduit entrances containing electrical or communications cables. It is important to note that a UL mark does not make a product suitable for a purpose other than the one it’s designed or marketed for. Many commercially available duct putties are UL approved.ĭuct putty is not, however, an excellent conduit sealant. It seals gaps and cracks and works well to reduce drafts, moisture, dust, insects, and noise. Uses in the electrical and communications markets include sealing around electrical boxes, flashings, junction boxes, pedestals, service mast entries, etc. It is also commonly used in the refrigeration and plumbing trades. It can be easily worked by hand to form an infinite variety of shapes that are pressed into place to seal HVAC ductwork-thus its name as a duct putty. Variations include mastic or oil and wax blends. Though formulations obviously vary by manufacturer, duct putty is typically a thick and pliable inert commodity made of clay and water. This article reviews duct putty and analyzes specifically why its use as a duct sealant can be problematic. Unfortunately, this seemingly ideal sealant too often falls short of expectations, resulting in expensive damage that far outweighs any perceived convenience or cost savings over high-performance, engineered sealing solutions. It ostensibly allows cable installers to comply with industry codes mandating that conduits are sealed. The product is cheap, safe, easy, and ubiquitous. Size: 20 g: 12 x 6 cm, Thickness: 1.Duct putty is arguably the most common product used to seal electrical and telecommunications conduits worldwide. An ideal solution for filling the holes/cracks of pipe. Harden Automatically: It comes with coolant and will naturally harden in the wind, so it's best to use it as soon as possible after tearing for best results.ĥ. ![]() Wide Application: It can be used for wall repair and crack filling repair (such as air conditioning pipes, rat holes, etc.), can also be used for various pipe fittings, equipment installation, fixing and repair.Ĥ. You can according to the actual hole size, shape to plastic it, it is very simple and convenient to use.ģ. Easy to Deform, Easy to Use: It is very malleable and you can twist it into any shape you want, such as round, square, long. Moreover, its good adhesion makes it perfect for patching holes.Ģ. As a result, it has a high density and can effectively prevent animals from entering. Quality Material, Multiple Functions: It is made of an environmentally-friendly engineering material that is waterproof and corrosion resistant. ![]()
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