---

Epoxy.com System #495 Installation Guide

Installing System #495 Elastomeric Urethane Pedestrian Traffic Membrane System

---

Elastomeric Polyurethane System Description

Epoxy.com System #495 is an Elastomeric Urethane Membrane System, that is liquid applied.  System #495 Elastomeric Membrane System is seamless, elastomeric (flexible), and UV.  These qualities make it an excellent choice for outside applications in direct sun and weather, where water tightness, durability, and excellent appearance is required.

Epoxy.com System #495 has excellent abrasion and chemical resistance.  The surface of System #495 can be varied to achieve the required anti-skid and decorative look.

Surface Preparation

Quality surface preparation is an absolute requirement of a quality installation.  Be sure to follow surface preparation requirements found at www.epoxy.com/surfaceprep.aspx.  This system installs best when it is about 75 degrees F.  The minimum temperature of the slab must be at least 50 degrees F. for proper curing of the material

MATERIAL QUANTITIES

Guideline System Requirements for 1000 ft�

Epoxy.com Elastomeric Decking System

Step #	Product	Coverage
1	Epoxy.com Product #899 Primer	250-300 SF per gallon
2	Epoxy.com Product #459 Elastomeric Membrane	50 SF per gallon
3	Epoxy.com Product #459 Elastomeric Membrane	100 SF per gallon
4	Epoxy.com Product #77 Broadcast (anti-skid) aggregate	0.5 lbs per SF
5	Epoxy.com Product #467 Topcoating	100 SF per gallon

Installation

Priming

All floors should be primed in order to assure maximum bond.  The primer also helps to fill small holes and seal air in the concrete to prevent off-gassing that may cause bubbles.

Mixing the Product #899 Primer

1. Before starting be sure to mask all termination points like doorways, expansion joints etc.  Duct tape or other heavy duty masking materials work better than conventional masking tape.

2.  Mix both "A" and "B" sides separately, with a clean mixer before starting. 

3.  Remember to mix small batches.  If you make a batch to big you will waste material, as it will set up before you can use it. Mix 2 parts "A" (Resin) with 1 part "B" (Hardener) for 3 minutes using an Epoxy.com Paddle (5 inch or larger) in a low speed drill.

4.  It is recommended that you avoid thinning.  If you must thin, use no more than 10% by Volume of high quality (high purity) xylene.  That amounts to about about 12.8 oz per gallon, maximum.

5.  Do not mix more material than you can use in 30 minutes.  If the air warmer than 75 degrees F, and/or if your material is warmer than 75 degrees F. make your batches even smaller.  If you make a batch too small you just have to make another batch.  If you make it too large, you will likely waste material.

 Application of Primer

1.  Apply by 3/8 nap shed resistant roller or pour primer onto the concrete and squeegee and back-roll with a short to 3/8 nap shed resistant roller as necessary.  Application rate is 250 square feet per gallon.

2.  Do not allow to run or puddle. Primer is only required on concrete surfaces. Be sure to remove the masking tape as you go.  If you let the Product #899 Epoxy Primer cure too much first the tape will be very difficult to impossible to remove.

3.  Allow primer to sit for about 6-10 hours, or until the primer is hard, cool, and ready to walk on.  If primer is to be allowed to set for more than 24 hours before installation of next step, broadcast the surface with Epoxy.com Product #77  or dry 30 mesh silica sand to saturation.

 Application of Flexible Urethane Crack Isolation Membrane

Epoxy.com Product #459 Elastomeric Membrane

1. Before starting be sure to mask all termination points like doorways, expansion joints etc.  Duct tape or other heavy duty masking materials work better than conventional masking tape.

2.  Be sure to mix small enough batches, so as not to waste material. Mix 6.6 Parts A with 1 Part B by volume.  Stir for 3-5 minutes with and Epoxy.com Mixing Paddle (minimum 5 inch) in a low speed drill for 3-5 minutes.  Although not recommended, you can add a small amount of high quality (high purity) xylene to lower the viscosity.

3.  Mix only what you can use in 30 minutes at 75 degrees F.  Remember that if your material, air, or substrate temperatures are higher you will need to make batches that you can use before the usable potlife at those higher temperatures.  Remember if you make a batch too small you have to make another batch.  If you make the batch too big, you will loose material.

Application

1.  Spread Epoxy.com Product #459 Elastomeric Membrane at a rate of 50 square feet per gallon.

2.  Carefully back-roll using a short nap roller.  Be sure to remove the masking tape as you go.

3.  The Epoxy.com Product #459 Elastomeric Membrane should be allowed to cure for a minimum of 8 to 12 hours.  If more than 24 hours or so passes in between this coat and the next coat, be sure to solvent wipe this coat with xylene before going on to the steps below.

Application of the Elastomeric Broadcast coat

Epoxy.com Product #459 Elastomeric Membrane

1.  Before starting be sure to re-mask all termination points like doorways, expansion joints etc.  Duct tape or other heavy duty masking materials work better than conventional masking tape.

2.  Mix small batches to prevent waste. Mix 6.6 Parts A with 1 Part B by volume.  Stir for 3-5 minutes with and Epoxy.com Mixing Paddle (minimum 5 inch) in a low speed drill for 3-5 minutes.  Although not recommended, you can add a small amount of high quality (high purity) xylene to lower the viscosity.

3.  Mix only what you can use in 30 minutes at 75 degrees F.  Remember that if your material, air, or substrate temperatures are higher you will need to make batches that you can use before the usable potlife at those higher temperatures.  Remember if you make a batch too small you have to make another batch.  If you make the batch too big, you will loose material.

Application

1.  Spread Epoxy.com Product #459 Elastomeric Membrane at a rate of 100 square feet per gallon.

2.  Carefully back-roll using a short nap roller.  It is important that the material must be applied evenly.  Thicker areas of resin will create high spots, thinner areas of resin will create low spots.  Uneven distribution of the resin thickness at this stage will be exacerbated  by the sand broadcast below which will make the thicker areas even thicker.  So be sure your Epoxy.com Product #459 Elastomeric Membrane is applied evenly

3. Allow to level for 10 to 15 minutes.

4.  Apply Epoxy.com Product #77 (30 mesh silica) Broadcast sand into the wet surface of the Epoxy.com Product #459 Elastomeric Membrane until the surface appears dry.  Broadcast by throwing the Product #77 into the air and letting in drop into the surface below.  Avoid clumping up the sand, by throwing it directly at the surface and creating high spots.  If you you cannot broadcast far enough onto the Product #459 without walking on the wet material, be sure to put on spiked shoes first.  Never walk in wet material without spiked shoes.  Many installers find it works better to broadcast as they go, to prevent having to walk in the wet material with spiked shoes. Remove your masking tape after as you go, after you broadcast your sand.

5.  The Epoxy.com Product #459 Elastomeric Membrane should be allowed to cure for a minimum of 12 to 16 hours. Sweep off the excess Product #77 the next day.  Sand lightly or use a rubbing stone.  Vacuum to remove all the loose sand.  The better you vacuum it, the more even the appearance usually is.

Sealing with the Elastomeric Aliphatic Urethane Topcoat

Applying The Epoxy.com Product #467 Aliphatic Urethane Top-Coat.

1.  This material can be applied by a short nap to 3/8 inch roller.  Alternately you can pour the product in a line on the floor, spread with a squeegee and then back roll with a short nap roller. Be sure to leave an even texture.

2.  Allow to cure.

3.  Repeat the "Sealing with the Aliphatic Top-Coating" section for a second coat is optional

4.  Full cure takes 5 days.  This 5 day cure will give you the maximum abrasion and chemical resistance.  You can typically however, open to light foot traffic in 24 hours at 75 degrees. F.

Remember when in doubt contact Epoxy.com Technical Support.

 

Secure Login