FAQ – Raised Access Flooring

Seal Bond™ Pedestal Adhesive provides a high performance, high strength, cost effective means of installing Access Flooring Pedestals.  Seal Bond™ has supplied the Raised Access Flooring industry with consistent high quality products and performance for over 15 years.


Seal Bond™ Pedestal Adhesives have been used for many years due to their ability to provide the strength necessary to replace more expensive mechanical fasteners.  The actual strength values will depend on the type and size of Access Flooring Pedestal that is used.  Please refer to the guidelines supplied by a Structural Engineer or the Access Flooring Manufacturer for expected strength with Seal Bond™ Pedestal Adhesives.


Seal Bond™ can be ordered directly by contacting Seal Bond™ at 1.800.252.4144.  You may be referred to a reseller based on your location.


Seal Bond™ 95 is available in 1 and 2 gallon pails as well as 10.3 ounce and 28 ounce cartridges.

Seal Bond™ 220 is available in 1 gallon pails.


Seal Bond™ adhesives may have a practical shelf life that greatly exceeds one year depending on how they have been stored.  However, due to various storage conditions that may occur recommended shelf life is 11 months.  Of course it is completely at the option of the user to evaluate and use material that has exceeded the recommended shelf life.


Both Seal Bond™ 95 and Seal Bond™ 220 are very safe for use.  Neither contains solvents, thus are very low or contain virtually no VOC’s.  While new Safety Data Sheets require specific industry wide “warning statements” based on the ingredients, users that follow common precautions such as protection of skin and eyes will enjoy easy and safe use of these products.


It is mostly about “the water”.  Seal Bond™ 95 and Seal Bond™ 220 are both pedestal adhesives but they are comprised of two completely different chemistries.  SB-95 contains virtually no water.  In fact, SB-95 cures/crosslinks when it is exposed to atmospheric moisture (from the air or concrete) therefore it thrives in a humid environment.  Seal Bond™ 220 contains moisture and cures when all moisture evaporates from the adhesive.  Therefore, Seal Bond™ 220 typically takes longer to cure when exposed to high humidity.  While both Seal Bond™ 95 and 220 typically exceed an Overturning Moment Value of 1000 inch lbs. even with the lightest duty pedestals, Seal Bond™ 95 will usually provide a greater strength (5-50%) for pedestals selected for higher strength.


Most concrete sealers when properly installed and cured will be completely chemically compatible with Seal Bond™ 95 and Seal Bond™ 220 Adhesives.  The real question is how will the system (which is comprised of the actual concrete floor, sealer, adhesive and specific pedestal) perform relative to the engineering specification of a particular project.  If sufficient force is applied (Overturning Moment Test) will the adhesive be stronger than the coating to the concrete and pull the sealer off the floor?  Since there are literally hundreds of sealers on the market the only answer is to test the actual components for each job (yes, concrete varies).  In many cases adhesion of the Seal Bond™ Pedestal Adhesive can be improved by scuffing the floor sealer.  This activity will modify the surface of the sealer and promote anchoring of the adhesive.

Common concrete sealers used in Access Flooring can be divided into at least three categories.  The first, “film forming” sealer form a continuous membrane on top of the concrete.  A lot of concrete sealers are “penetrating” meaning that they go down into the concrete rather than form a film on the surface.  When Seal Bond™ Adhesive is applied over a penetrating sealer it can bond to the surface of the concrete (preferred) rather than to the membrane which is present with a film forming sealer and be dependent on the sealers bond strength to the concrete.  A third category would be two-part epoxy coatings.  Seal Bond™ 95 adheres well to most but not all epoxy coatings and Seal Bond™ 220 should always be tested when using Epoxy.


To improve adhesion performance make certain that all surfaces are clean and free of dirt, grease, oil, frost, curing compounds and other contaminants. Certain concrete sealers may leave a very smooth difficult to bond to profile.  Abrasion of these surfaces may greatly improve adhesion results.


The amount of adhesive applied to the bottom of the pedestal can vary by pedestal size and professional installer preference.  Seal Bond™ recommends that for optimal performance the pedestal bottom be completely covered by adhesive which is typically indicated by adhesive exuding from all four sides.


Application of the adhesive to the pedestal is determined by the preference of the professional installer.


The basic rule is 10-14 days for Seal Bond™ 95 and 21 or greater days for Seal Bond™ 220.  Both are dependent on the specific installation.  Seal Bond™ 95 needs moisture in order to complete its curing process so it will cure faster when moisture is readily available.  On the contrary, Seal Bond™ 220 needs to allow for moisture to evaporate in order to cure.  When the Seal Bond™ 220 adhesive is between the steel pedestal and a sealed concrete floor the evaporation may take an extended period of time.


Seal Bond™ also sells sealants for underfloor air plenums as well as numerous concrete sealers.  Please refer to our website www.seal-bond.com in the Access Flooring area for detailed information about these additional products.


CISCA (Ceilings & Interior Systems Construction Association) – Recommended Test Procedures for Access Floors Section 6 – Pedestal Overturning Moment Test.

www.cisca.org


Yes.  Seal Bond™ adheres to many common construction materials.  However, since surfaces vary in most situations you will want to test for adequate adhesion.


Seal Bond™ 95 can be used as low as 30° F. However, it should be conditioned to a targeted room temperature of 72° before use.   Since atmospheric moisture is typically lower at reduced temperatures the rate of cure will slow down.  Seal Bond™ 220 should not be installed below 50° F. and will also cure more slowly at lower temperatures.


If pedestals bonded with either Seal Bond™ formula are exposed to water for a couple of hours after they are fully cured there would not typically be any reason for concern with their ongoing performance.  If exposure exceeds a couple of hours, a determination would need to be made on a case by case basis if the adhesives performance has been compromised. This might include performing sample Overturning Moments Tests with the pedestals in question.


Since chemical resistance includes an extremely long list of potential chemicals, please contact a Seal Bond™ representative to discuss specific chemicals.


This can be accomplished by heating the pedestal with a torch.