|
Rapid Set® Eisenwall® — HOW TO
Premium Cement for Exterior Plastering
Application Guidelines:
Rapid Set® EISENWALL® is applied in much the same way as traditional plastic cements or Portland and lime. However, EISENWALL® has a shorter setting time and certain precautions need to be taken for optimum application. Following the Guidelines below will help to ensure a high quality crack-free finish, and an easy, hassle-free installation. Also see Frequently Asked Questions.
Do NOT mix Rapid Set® EISENWALL® Cement with portland cement or Portland based plastic cements. Blending Rapid Set® EISENWALL® Cement with other cements can decrease its performance and can cause other adverse effects.
Do NOT add lime. Under no circumstances should lime be added to Rapid Set® EISENWALL® Cement. Also, Do NOT add any pump aids or flow agents to Rapid Set® EISENWALL® Cement. EISENWALL® already contains a high performance pumping additive.
Use only clean, high quality, washed plaster sand. Do NOT use dirty or silty unwashed sand. Dirty sand can lead to cracking and hose-packing. Use only clean, clear water that would otherwise be suitable for drinking. Silty water, or water that contains dissolved salts can affect the set time of Rapid Set® EISENWALL® and cause cracking. See Specification.
Use only clean, clear water that would otherwise be suitable for drinking. Silty water, or water that contains dissolved salts can affect the set time of Rapid Set® EISENWALL® and cause cracking. See Specification.
Do NOT add anything to Rapid Set® EISENWALL® Cement other than sand, water, or Rapid Set® Set Control®. The setting time of Rapid Set® EISENWALL® is approximately 90 minutes at 70°F (21°C). It is important that the plastering operation be organized within this time limitation. Warmer weather conditions may significantly speed up the setting characteristics, thus reducing the working time. Cooler weather conditions slow down the setting characteristics. The working time may be extended by using cold materials or by using Rapid Set® Set Control™. Up to two packets of Rapid Set® Set Control™ per 88lb. bag of Rapid Set® EISENWALL® may be added to the mix. To use Rapid Set® Set Control™, place the contents of the packet in a clean bucket and dissolve with water. Add this solution to the mixer along with the mixing water. Under normal conditions each packet of Rapid Set® Set Control™ (per 88lb. bag of Rapid Set® EISENWALL®) extends the setting time approximately 10 to15 minutes.See Frequently Asked Questions regarding the use of Rapid Set® Set Control® to extend the working time of EISENWALL®.
For best results, apply brown coat as soon as scratch coat is rigid enough to receive it. Rapid Set® EISENWALL® must be water cured after application. For 2 hours after placement, spray mist the plastered surface with clean water to maintain its wet sheen. Neglecting to follow proper wet-curing procedures can lead to cracking. Wet-curing is especially important in hot or windy weather, or when applying the product one-coat, full thickness. Also, before applying brown coat or stucco finish coat, wet the entire wall to ensure even suction.
When pumping Rapid Set® EISENWALL®:
Do NOT begin mixing until the gun and finishing crews are ready to work. Ideally, material should mix for 4-7 minutes in the mixer, and be poured in the hopper as soon as the nozzleman is ready to spray. Do NOT mix for more than 10-15 minutes or retemper material. Try to avoid delays between gun application (downtime when the material sits in the hose between application). Rapid Set® EISENWALL® is a fast setting material that can set up in the hose if guidelines are not carefully followed.
Use only proven, quality mixing and pumping equipment for the application of Rapid Set® EISENWALL®. A breakdown on the spraying rig can lead to set ups in the hose if careful attention is not paid. Pay careful attention to the condition of the pump manifold and clean if buildup becomes present. Always have a fire hydrant adapter on hand to clean out the hoses in case of pumping equipment failure.
Between mixing batches, always clean the grating and screens on both the mixer and hopper. Also, spray the mixing paddles with a high pressure hose to control buildup of material on the paddles. Hardened, built-up material can break off and cause hose packing and damage to pumping equipment. Always try to keep buildup of hardened material in the mixer and hopper to a minimum.
Do NOT use more hose than necessary to reach the application surface. If possible, move the spray rig to a better position to minimize hose length.
Always follow proper pumping procedures; such as pumping a wet slurry to prime the hose before pumping mixed plaster, and cleaning the hose with a sponge and generous amounts of water during breaks and after pumping. If possible, "grease" the hose with a high quality pump-aid, such as Hillbest-25 or Pozalite prior to pumping EISENWALL®.
Use a 5/8" nozzle instead of 1/2". This not only reduces buildup in the nozzle, but gives a better spray pattern with Rapid Set® EISENWALL®.
When applying Rapid Set® EISENWALL® one-coat, full thickness:
It is important that the mix be thick. Make sure the mix is not too wet. A mix with overly high flow characteristics will sag and not hang on the wall at full thickness.
Make one pass with the gun, smooth out any uneven areas, then return immediately to fill in any low spots that need final attention.
It may be necessary to apply a thin layer to several square yards and allow the material to stiffen for a few moments before building up to a full 7/8" thickness. If you have not used Rapid Set® EISENWALL® previously, and would like jobsite or technical assistance or are interested in becoming an approved applicator, contact Rapid Set® Products at 800-929-3030.