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Morgan Adhesives One Pack Mastic (OPM)

Morgan Adhesives One Pack Mastic (OPM) is a quick setting, non-slip, thin bed white mastic which cures to a high bond strength with superior flexibility. It has all the properties required of a mastic adhesive plus excellent water resistance. One Pack Mastic installations can usually be grouted after only 6 hours.

Product Type: Adhesive

Application Area: Wall

Compatible Substrates & Surfaces: Brick, Coated Surfaces, Concrete, Glass, Metal, Porcelain, Stainless Steel, Stone

Application Method: Trowel

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Identification & Functionality

Product Type

Features & Benefits

Labeling Claims
Features
  • High Bond Strength & Superior Flexibility
  • Water Resistant
  • Bonds To Difficult Substrates

Applications & Uses

Application Area
Application Method
Suitable Substrates
  • Concrete/Cement Render
  • Brickwork/Blockwork (Cement Rendered)
  • Fiber Cement Sheets (Primed)
  • Plasterboard (Primed)
  • Over Morgan Waterproof Membrane
  • Painted Surfaces
  • Tilt Up Slabs
  • Tile Over Tile
  • Tiles in all wet areas including swimming pools 
Application On

INTERIOR/EXTERIOR

Walls
Suitable Tiles
  • Natural Stone
  • Monocottura
  • Porcelain
  • Stainless Steel Mosaics
  • Bicottura
  • Fully Vitrified
  • Glass Mosaics
Precautions

OPM is unsuitable for:

  • Bonding moisture sensitive green marble
  • Bonding to MDF board or timber & wax impregnated wood (Our technical advice - sheet with fiber cement boards)
Applications

Surface Preparation & Expansion Joints

All surfaces to be tiled must be flat and true, free from oil, dirt, grease or any other contaminants. Very porous substrates should be primed with Morgan Universal Primer. Incorporate expansion joints in accordance with AS 3958.

  • Concrete: New concrete must be allowed to cure for 6 weeks and should have a wood float finish. Use Floor Prep to acid etch an adhesive key into concrete finished with a steel float.
  • Cement Render: Render to be left with a wood float finish and allowed to cure for 7 days.
  • Fiber Cement Sheets: Fiber cement sheets must be primed with Morgan Universal Primer and all joints must be taped with PVC duct tape and fixed according to the manufacturer’s instructions.
  • Plasterboard: Plasterboard must be fixed as per manufacturer’s instructions. Jointing compound must be primed with Morgan Universal Primer.
  • Painted Surfaces: Oil based paints must be in good condition with all flaky paint removed. Surfaces must be washed with a commercial cleaner such as Sugar Soap. Acrylic based paint surfaces are to be treated in the same manner as oil based paint surfaces. PVA based paint surfaces must be scabbled to expose at least 80% of the original substrate.
  • Tilt Up Slabs: Silicon or diesel release agents must be thoroughly removed prior to tiling. Liaise with the manufacturer to identify the release agent and removal strategy. Gyprock sheeting or sandblasting recommended.
  • Tile Over Tile: Tiles should be thoroughly cleaned with a commercial cleaner such as Sugar Soap.

Mixing

Add OPM to clean water at a ratio of 20kg to 5 liters of water. Mix the adhesive to a smooth paste free from lumps by using a drill that has a speed lower than 300 rpm, or mix by hand. Slacken the adhesive and re-mix after 5 minutes.

Open Time

OPM has an open time of approximately 10-15 minutes, which can be shortened to just a few minutes by the action of sun, wind, high temperatures or highly absorbent surfaces. Dampening or priming the substrate prior to tiling prolongs the open time of the adhesive. Tilers need to constantly check that the adhesive has not formed a surface skin and is still fresh to touch. Adhesive with a surface skin must be always removed and discarded.

Application, Tools & Adjustability Time

Always install the tiles in accordance with AS 3958 and ensure the backs of the tiles are free of dust. Spread OPM evenly across one square meter at a time with a 6mm notched trowel for walls. The choice of trowel should be governed by the depth of the knobs, grooves or ridges on the back of each tile and the evenness of the substrate. Lay the tiles with a fair pressure and at right angles to the adhesive notched pattern. The final bed of adhesive should be between 2mm and 4mm. Tiles can be adjusted for approximately 10 minutes after laying.

Coverage

20kgs of OPM will cover approximately 16 square meters with a 6mm notched trowel for walls.

Cure Time

OPM cures in approximately 6 hours at 23°C and 50% relative humidity. High density substrates or tiles and temperatures during installation below 10°C will significantly increase the cure time.

Clean Up

Remove excess OPM from the grout joints after 10-15 minutes and clean the tiles with a damp cloth or sponge. Tools and hands can be cleaned with water while the adhesive is still wet.

Joint Grouting

Depending on environmental conditions, commence grouting after approximately 6 hours. Use Regular or Superior Grout for grout joints between 3mm to 6mm. Use Aquapoxy, a three component acid resistant epoxy grout, if the joints are required to have a good chemical resistance. Grout Add may also be mixed with Regular Grout to impart extra flexibility, reduce porosity and increase water resistance.

Joint Grouting Precautions

Do not use excessive amounts of water during mixing or initial cleaning as this will cause irregular color finishes and also weaken the grout. Do not mix the grout with an electric drill above 300 rpm as this can entrap air into the mix causing grout to dry soft and powdery or with unsightly pin holes in the surface. All grouts should be damp cured for 48 hours. Refer to the australian standard as 3958 part 1 section 5.7.3.

Regulatory & Compliance

Certifications & Compliance
Regulatory & Compliance

Specification Clause

The wall adhesive shall be Morgan OPM (One Pack Mastic) - a high performance tile adhesive complying with all relevant Australian & International technical standards.

Morgan Quality Policy Statement

OPM is manufactured and distributed to a quality system based on ISO 9001:2000. OPM is guaranteed for 15 years when installed to the guidelines of AS 3958 Part 1 & 2, 2007 and in conjunction with written technical information supplied by Morgan Ceramic Tile Adhesives.

Packaging & Availability

Packaging Type
Packaging

OPM is available in 20kg, 10kg and 5kg bags and 1kg handyman tubs.

Storage & Handling

Pot Life

OPM has a pot life of approximately 1-2 hours at 23°C and 50% relative humidity.

Shelf Life

Twelve months if stored in a dry & elevated position in the original factory sealed packaging.