Questions & Answers
  How do I apply Silent Running?
  How much time between coats?
  What temperature can Silent Running be applied in?
  What is the coverage?
  What colors is it?
  Will it burn?
  What sort of dB reductions can I expect?
  What do I have to do for surface preparation?
  Where do I put it?
  Should I coat the engine or compressor itself?
  What is the difference between SR 1000, SR 500, and SR CAR?
  Can it be put on wood?
  I only want to do my hatch cover, will it help?
  Can I use it on my exhaust?
  What is Silent Running made of?
  What makes Silent Running work?
  How hot does it get, will it increase the temperature in the space?
  What sort of texture does it dry to?
  Can it be painted over?
  When can I begin working in the space?
  How much weight will it add?
  How quiet will my boat be after applying Silent Running?
  Will it eliminate the wave slap if I coat the bow of the hull?
  If I paint my child's room will it soundproof it?

 

 

 

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^top   How do I apply Silent Running?
.   Spray, roll, or brush it on. The key to Silent Running is to build it up to a 40 mil minimum final application thickness regardless of how it is applied.

Spray - we use an inexpensive Binks Pressure Pot with a large orifice tip (#68, gel coat tip). Apply at 10-12 mils per coat and build up in multiple coats to a final dry film thickness of at least 40 mil. Please see application notes.

Roller - use a thick nap cloth roller.
Again, use plenty of material on the roller and use short strokes with light pressure.
Do not try to make it go too far in one stroke; you should be able to get about the thickness of 1 matchbook cover per coat. 4-5 matchbook covers will approximately equal the desired thickness of 40 mils. Rolling will produce a "stippling" effect. For a smoother finish, tip off very lightly with a brush after rolling.

Brush - use at least a 3" wide nylon bristle brush.
Load the brush up with an ample supply of Silent Running and brush on in one direction, using short strokes. Do not try to make it go too far in one stroke; you should be able to get about the thickness of 1 matchbook cover per coat. 4-5 matchbook covers will approximately equal the desired thickness of 40mil.

^top   How much time between coats?
.   Silent Running air dries to the touch in about 1 hour. This varies with temperature and humidity. If outdoors, try not to apply in the late afternoon, especially in the spring when there is the chance of high humidity. Once it is dry to the touch it may be over coated.
^top   What temperature can Silent Running be applied in?
.>  

Temperature range for application is 50F to 100F, however be aware that at the lower temperatures it will take longer to dry and at the higher temperature it will dry quicker.

We highly recommend that the temperature of the product and the substrate be over 60F.

Just because the air temperature is 60F does not mean the surface and material temperature is 60F!

^top   What is the coverage?
.   1 gallon covers roughly 30 square feet at a final application thickness of 40 mils, achieved in multiple coats. DO NOT thin, DO NOT "stretch". Better to have a thicker application rather than less than 40mil.
^top   What colors is it?
.   SR 1000 is a standard off white.
SR 500 is a standard light grey.
SR CAR is either grey or black.
We can custom tint for quantities over 25 gallons.
^top   Will it burn?
.   No!
SR 1000 has US Coast Guard approval for flammability and toxicity as well as European Union approval and Lloyd's Registry approval.
SR 500 and SRCAR have passed the Federal Railroad Association tests for flammability, toxicity and smoke density (ASTM E162, 662, and 84-05). If Silent Running comes in contact with flame, it will self extinguish.
^top   What sort of dB reductions can I expect?
.   There is no real way to determine the exact decibel reduction for each and every application; however, we typically see a 6-8 dB reduction which is roughly half of the audible noise. Again, remember every application is different.
^top   What do I have to do for surface preparation?
.  

We highly recommend you prepare the surface as you would for any type of coating.

Clean, dry, oil and dust free.

If on metal, lightly scuff with an 80 grit paper and clean.
If on fiberglass or plastic, ensure that it is not a glossy surface, such as an exterior gel coat. If it is an exterior (shiny) gel coat or an epoxy such as West that forms an "amine blush" after curing, wash thoroughly to remove any waxes, mold release or blush. Allow it to dry and scuff with an 80 grit paper and clean.

^top   Where do I put it?
.  

On boats it can go in all interior spaces. This includes the bilge, hull, bulkhead, ceiling, hatch covers, control spaces, generator enclosures to name some.

For automotive applications we recommend you begin with the wheel wells, firewall, trunk, and door panels, then as much of the interior as you are able.

Generators, compressors, HVAC's and hydraulic pumps we recommend doing the inside of their enclosures.

^top   Should I coat the engine or compressor itself?
.   No, we do not recommend coating any machinery itself. We do recommend that you start where the motors or machinery are mounted and work your way out for the best results.
^top   What is the difference between SR 1000, SR5 00, and SR CAR
.  

SR 1000 is for marine applications, and designed to endure the harsh environment and has US Coast Guard approved for flammability and toxicity.
SR 500 is for industrial applications, for use on air handlers, sorters, conveyors, fan shrouds, and HVAC. It is not recommend for marine use.
SR CAR is used to improve stereo quality and to reduce unwanted road noise.

Is one better than the other?
No, they all perform equally well for vibration and sound damping, the difference is each one's designed application environment and slight chemical differences.

^top   Can it be put on wood?
.   Yes, however the surface must be dry and clean of any chipping or peeling paint, epoxies, fiberglass, etc. The first coat over bare wood will act like a primer only it will be absorbed by the wood; we recommend you use an inexpensive wood primer prior to applying Silent Running. Apply at 10-12 mils per coat and build up in multiple coats to a final dry film thickness of at least 40 mil. Please see application notes. The thicker the wood the thicker the final application thickness will need to be. You may need to go to 50 mils for maximum effectiveness.
^top   I only want to do my hatch cover, will it help?
.   It will help some, but Silent Running works by absorbing vibration energy, and is not a sound absorption product. One of the benefits of vibration absorption is sound reduction. So the more area you are able to do from where the vibration is generated, the better the sound reduction you will receive. Think of dropping a pebble into a pond, the closer to the pebble you stop the ripples, the smoother the entire pond. Silent Running works the same way, it is best to start at the source of the noise and vibration, the engine. Because Silent Running is not affected by water, it can be put in the bilge. So start at the engine and work your way out. Include the stringers, hull, bulkheads, ceilings, and hatches. This will provide you with the most noise reduction and vibration attenuation.
^top   Can I use it on my exhaust?
.   If the noise is structure borne then Silent Running will help. If it is air borne noise, unless in an enclosed space then Silent Running will not help as much, as it does not do air born noise absorption.
^top   What is Silent Running made of?
.   Silent Running is water and latex based with proprietary materials added for vibration absorption, fire retardants, and adhesion, to name a few.
^top   What makes Silent Running work?
.   Silent Running works by a viscoelastic chemical process that absorbs vibration energy and converts that energy it into a low grade heat that is then disperses throughout the surface of the product, therefore reducing the airborne noise and reducing the need for absorption materials. Silent Running best attenuates mid to low range frequencies.
^top   How hot does it get, will it increase the temperature in the space?
.   The amount of heat generated is so minimal that it is not measurable by conventional methods. It will not increase the temperature in the space.
^top   What sort of texture does it dry to?
.   It dries to a hard surface. Silent Running does not contract or expand while curing, what you apply wet is what you are left with dry.
The final texture will be determined by your method of application, a brush will leave brush strokes, a roller will stipple slightly, and the spray application will provide you with a lightly textured surface.
^top   Can it be painted over?
.   Yes. Be sure to allow ample dry time prior to coating over. We recommend at least 1-2 weeks for it to dry depending on conditions such as temperature and humidity. We have used several different coatings successfully. However due to the large number of different coatings out there, we can't try them all. We suggest that you try your coating over it in an inconspicuous spot. Be sure to allow ample dry time prior to coating with vendors paint. Call for more information (877) 436-6542.
^top   When can I begin working in the space?
.   We recommend that you allow Silent Running to cure 24 hours from your final coat prior to working in the area.
^top   How much weight will it add?
.   Once dry Silent Running weighs 8 oz. per square foot at a final application thickness of 50 mils.
^top   How quiet will my boat be after applying Silent Running?
.  

Each application is different. We anticipate a 6 - 8 dB reduction which equates to roughly half of the audible noise. In some applications you may receive a greater reduction or less depending on the frequencies you are attempting to attenuate, the thickness of the substrate as well as the final application thickness of Silent Running.

Our service department is available to provide you with test results showing the frequencies Silent Running best attenuate, or to answer any questions you may have, they can be reached at (877) 436-6542.

^top   Will it eliminate the wave slap if I coat the bow of the hull?
.   No, it won't eliminate it, although it will reduce the amount of resonance emitted throughout the hull. Wave slap is an impact sound and you can not eliminate it. We find that Silent Running applied to the hull and some acoustic absorption material applied over it will provide you with the best results.
^top   If I paint my child's room will it soundproof it?
    No, Silent Running is not an acoustic absorption material. It works by absorbing vibration.






 


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