Merlex Stucco Keeping it Premium since 1963


Interior/Exterior Plaster

Super Shower Finish Super Shower Finish Super Shower Finish

  Super Shower Finish
  Polymer-Modified, Portland Cement Based Plaster Finish For Interior Surfaces Exposed to High Moisture
  Trowel or spray applied.
  Super Shower Finish is a mechanically-blended compound of grey portland cement, hydrated lime, inert aggregates, and specific additives, designed to achieve a steel trowel finish over a portland cement base. It requires the addition of only clean water for mixing.Shower Finish will provide excellent bond to any properly prepared portland cement base surface. It may be used on interior or exterior surfaces to provide a highly condensed, smooth surface for painting. Ideal for use in high moisture areas such as showers, bathrooms, swimming pool dressing rooms, laundry rooms, locker rooms.
  • Lasting durability, protects as it decorates.
  • Mixes easily with potable water.
  • Genuine lath and portland cement plaster finish.
  • Low maintenance, economical.
  • Weather resistant - does not deteriorate with age.
  • Adds aesthetic value to any building.
  • Impervious to termites.
  Super Shower Finish will provide excellent bond to any properly prepared portland cement base surface.
  One 90 lb. (40.8 kg) bag covers approximately 10 to 16 sq. yds.(8.3 to 14.5m2), depending on thickness and condition of basecoat.
Surface Preparation
  New portland cement substrates should be properly cured prior to application of Super Shower Finish (approximately 7 days). All receiving surfaces must be structurally sound, clean, free of dust, dirt, silicones, paint products, efflorescence or any other contaminant which could impair the natural bond. Surface defects, such as cracks, holes or voids should be repaired prior to application. Basecoat should be plum, level, and square to prevent uneven thickness of Super Shower Finish.
Environmental Conditions
  Do not apply Super Shower Finish in exterior applications if the prevailing outside temperature is below 40°F (4°C) or is forecast to fall below 40°F (4°C) within 24 hours after application. Moist curing may be necessary during hot/dry weather conditions. On interior applications, openings in the building (windows, doors, etc.) should be covered to avoid excessive wind which could cause premature dry-out.

Super Shower Finish should be mechanically mixed for approximately 15 to 20 minutes to provide maximum workability. For Hand Application: 8 to 10 qts. (7.6 to 9.5 ltr.) of clean water per 90 lb. (40.8 kg.) sack will be necessary. Add approximately 1/2 of the required water to the mixer. With the blades running, carefully add the Super Shower Finish. Allow ample time for initial mixing, add remaining mix water, and complete mixing to produce a smooth, workable consistency. For Machine or Spray Application: Additional mixing water may be necessary. NOTE: For maximum strength and increased moisture resistance, add Merlex Acrylex T to the mix water using a 3:1 ratio (3 parts water/1 part Acrylex).


Apply Super Shower Finish to a thoroughly dry basecoat which has been evenly wetted by brushing or spraying (to control suction). Allow surface moisture to dissipate prior to application. Avoid the use of excessive moisture during application. Super Shower Finish should be applied to an approximate thickness of 1/8 inch (3mm). Trowel apply the initial coat (scratch coat) evenly to the substrate with enough pressure to insure tight contact. After the basecoat has been covered completely, double back and fill out to a true, even surface. Allow material to hydrate (begin to lose its moisture to the basecoat and to the ambient air) and then trowel it well, firmly compacting the material with water, free from catfaces and/or other blemishes or irregularities. Avoid unnecessary "build-ups" which cause shrinkage or check-cracking. A properly prepared basecoat will prevent leveling with the Super Shower Finish.

  Super Shower Finish should be applied true and even without imperfections which can be attributed to the applicator's work and materials. A top quality plastering job requires not only top-grade materials, but careful planning and application techniques. Do not deviate from instructions.
Clean Up
  Upon completion of work clean all mixing equipment and application tools immediately with water. During application protect floors and surrounding areas from spills and splatters.
  Merlex Super Shower Finish is warranted to perform in accordance with the product specification when used according to application instructions on the label. This warranty is limited and shall not exceed the total amount paid by the buyer for the product. In no event will Merlex Stucco, Inc. be liable for loss of profits, special or consequential damages in respect to any claim. The foregoing warranties are in lieu of all other warranties express or implied including those concerning fitness for a particular use.
Environmental & Safety
  Contains portland cement and is alkaline on contact with water. May be irritating to eyes and skin. Wear appropriate skin and eye protection. In case of eye contact, flush immediately with water. If irritation persists, consult a physician. Wash hands with soap and water after use or before eating. Keep out of reach of children.
Material Standards
  Portland cement: Type 1-ASTM, C150-56
Hydrated lime: Federal specs SS-L-351B Type F, ASTM C206-88
Silica Sand: ASTM C-144

Click on the images to view a larger display of our Before and After photos

Interior/Exterior Plaster Interior/Exterior Plaster
Interior/Exterior Plaster
Interior/Exterior Plaster
No Wax
Interior/Exterior Plaster
Interior/Exterior Plaster
Interior/Exterior Plaster
No Wax
Interior/Exterior Plaster
Interior/Exterior Plaster Interior/Exterior Plaster Interior/Exterior Plaster
Interior/Exterior Plaster
No Wax
For more information regarding the application process in the pictures, please refer to MJ Finishes at