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Resitech MD Screed

Description

industrial floor coatings product image :: laboratory floor Resitech MD Screed is a three component solvent free medium duty epoxy resin screed system designed to impart a highly abrasion and chemical resistant surface to treated substrates.

It is resistant to a wide range of chemicals, and has been used as a protective floor covering in such situations as

workshops
manufacturing areas
water treatments plants
food processing areas

Surface Preparation

Concrete substrates must be at least 28 days old and be clean, dry, sound and free of laitance, oil, grease and many other surface contamination which could impair adhesion.

Existing floor areas will require mechanical abrasion to reveal clean concrete. Enclosed vacuum blasting equipment or vonarx type scabblers should be used. Any areas which have been contaminated with oil or grease should be treated with hot compressed air blasting equipment. This will drive out any deep seated contamination.

Any areas of damaged concrete should be broken out and reinstated. For small areas of thin section repairs - less than 10mm in depth - an epoxy resin mortar should be used. For larger areas thicker section repairs a polymer reinforced cementitious repair mortar should be used, and these repairs will have to be allowed to cure for some 5-7 days prior to overcoating with Resitech MD Screed.

Any existing floor coatings must be removed prior to the application of Resitech MD Screed.

For newly laid concrete which has been allowed to cure for the minimum 28 days, a light pass with enclosed vacuum blasting equipment is required. This will lightly texture the substrate and ensure that all laitance and the remnants of any curing membranes are removed. Areas not accessible to the blasting equipment should be prepared by a combination of vonarx scabblers, hand held diamond grinders and needle guns.

All dust and deleterious matter must be removed by vacuum prior to the application of the primer.

Any flexible joints within the concrete substrates should be protected with masking tape and brought up through the surfacing.

The perimeters of the areas being treated, along with any grids, drains etc. should be protected with masking tape.

Priming

Immediately prior to the application of Resitech MD Screed the substrate must be coated with an application of Resitech Primer PS, a two component solvent free epoxy resin priming system.

Resitech Primer PS is supplied in pre-weighed packages, and it is essential that all of the curing agent, pack A, is added to all of the resin component, pack B, and mixed thoroughly for 60 seconds with a mechanical paint stirrer.

When fully mixed the primer should be applied immediately to the prepared substrate by brush or roller. The Resitech MD Screed must be applied onto the primer “wet-on-wet” and must not - under any circumstances - be applied to the primer if it is allowed to cure tack-free. This will take approximately six hours at 20^oC, and if allowed to happen the area will require re-priming. As a consequence, the size of area to be primed should be limited to that which can be screeded within six hours.

The coverage rate of Resitech Primer PS is dependant upon the texture and porosity of the substrate, but should fall in the range of 4-6m²/litre.

Mixing and Application

Resitech MD Screed is a three component system which is supplied in pre-weighed packages. It essential that all of the curing agent, pack A, is added to all of the resin component, pack B, and mixed thoroughly in a forced action mixing vessel (examples include pennine, daines, mixal etc.) for sixty seconds. The graded filler component, pack C, is then gradually added whilst mixing continues for an additional three minutes.

The fully blended system is applied in one application at the specified thickness onto the wet primer by a steel trowel in order to obtain a tight, uniform surface appearance.

Seal Coats

After the Resitech MD Screed has been allowed to cure for a minimum of 12 hours (at 20^oC) it should be sealed with a double application of RESITECH WB water based epoxy resin coating.

This is a two component system. Please refer to the RESITECH WB technical information sheet for full mixing and application instructions.

The coverage rate will be approximately 5-6m²/kg/coat when applied onto a correctly trowelled Resitech MD Screed surface.

Coverage Rate

A 28.0kg unit of Resitech MD Screed will cover approximately 2.5m 2 at a thickness of 5mm.

Technical Properties

Tensile Strength: (BS 2782 pt 10) - 8N/mm²
Compressive Strength: (BS 6319 pt 2) - 36N/mm²
Flexural Strength: 17.5N/mm²

Chemical Resistance

Resitech MD Screed exhibits excellent resistance to a wide range of chemicals, and is fully resistant to the following:

10% Sulphuric Acid
10% Hydrochloric Acid
Xylene
Methyl Ethyl Ketane
Petrol
20% Sodium Hydroxide
Ethylene Glycol
Trichlorethylene
Pot Life (20^oC) - 1 hour
Primary Cure (20^oC) - 12 hours
Full cure (chemical resistance)(20^oC) - 7 days
Application Temperatures - 5 - 30^oC

Please note that cure times and open to traffic times increase considerably at lower temperatures.

Cleaning

Tools should be cleaned with a hydrocarbon solvent before the initial cure has occurred.

Health and safety

It is recommended that barrier cream, gloves and overalls should be worn when using Resitech MD Screed. For full details please refer to the appropriate health and safety data sheet.



Quick-Find Industrial Floor Coating Range Browse Industrial... Optiseal AL Optus Block Sealer Resicote SF Resicote WB Resiflow HB Resiflow SL Resitech Clear PU Sealer Resitech Damp Bond Resitech Fast Resitech HD Epoxy Repair Resitech HD Screed Resitech MD Screed Resitech Primer PS Resitech Primer SF Rapid Resitech Primer SF Resitech Repair Mortar Resitech SF Rapid Resitech SF Resitech SL 1500 Resitech SL 2000 AS Resitech TD Screed Resitech WB	Resitech MD Screed Description Resitech MD Screed is a three component solvent free medium duty epoxy resin screed system designed to impart a highly abrasion and chemical resistant surface to treated substrates. It is resistant to a wide range of chemicals, and has been used as a protective floor covering in such situations as workshops manufacturing areas water treatments plants food processing areas Surface Preparation Concrete substrates must be at least 28 days old and be clean, dry, sound and free of laitance, oil, grease and many other surface contamination which could impair adhesion. Existing floor areas will require mechanical abrasion to reveal clean concrete. Enclosed vacuum blasting equipment or vonarx type scabblers should be used. Any areas which have been contaminated with oil or grease should be treated with hot compressed air blasting equipment. This will drive out any deep seated contamination. Any areas of damaged concrete should be broken out and reinstated. For small areas of thin section repairs - less than 10mm in depth - an epoxy resin mortar should be used. For larger areas thicker section repairs a polymer reinforced cementitious repair mortar should be used, and these repairs will have to be allowed to cure for some 5-7 days prior to overcoating with Resitech MD Screed. Any existing floor coatings must be removed prior to the application of Resitech MD Screed. For newly laid concrete which has been allowed to cure for the minimum 28 days, a light pass with enclosed vacuum blasting equipment is required. This will lightly texture the substrate and ensure that all laitance and the remnants of any curing membranes are removed. Areas not accessible to the blasting equipment should be prepared by a combination of vonarx scabblers, hand held diamond grinders and needle guns. All dust and deleterious matter must be removed by vacuum prior to the application of the primer. Any flexible joints within the concrete substrates should be protected with masking tape and brought up through the surfacing. The perimeters of the areas being treated, along with any grids, drains etc. should be protected with masking tape. Priming Immediately prior to the application of Resitech MD Screed the substrate must be coated with an application of Resitech Primer PS, a two component solvent free epoxy resin priming system. Resitech Primer PS is supplied in pre-weighed packages, and it is essential that all of the curing agent, pack A, is added to all of the resin component, pack B, and mixed thoroughly for 60 seconds with a mechanical paint stirrer. When fully mixed the primer should be applied immediately to the prepared substrate by brush or roller. The Resitech MD Screed must be applied onto the primer “wet-on-wet” and must not - under any circumstances - be applied to the primer if it is allowed to cure tack-free. This will take approximately six hours at 20^oC, and if allowed to happen the area will require re-priming. As a consequence, the size of area to be primed should be limited to that which can be screeded within six hours. The coverage rate of Resitech Primer PS is dependant upon the texture and porosity of the substrate, but should fall in the range of 4-6m²/litre. Mixing and Application Resitech MD Screed is a three component system which is supplied in pre-weighed packages. It essential that all of the curing agent, pack A, is added to all of the resin component, pack B, and mixed thoroughly in a forced action mixing vessel (examples include pennine, daines, mixal etc.) for sixty seconds. The graded filler component, pack C, is then gradually added whilst mixing continues for an additional three minutes. The fully blended system is applied in one application at the specified thickness onto the wet primer by a steel trowel in order to obtain a tight, uniform surface appearance. Seal Coats After the Resitech MD Screed has been allowed to cure for a minimum of 12 hours (at 20^oC) it should be sealed with a double application of RESITECH WB water based epoxy resin coating. This is a two component system. Please refer to the RESITECH WB technical information sheet for full mixing and application instructions. The coverage rate will be approximately 5-6m²/kg/coat when applied onto a correctly trowelled Resitech MD Screed surface. Coverage Rate A 28.0kg unit of Resitech MD Screed will cover approximately 2.5m 2 at a thickness of 5mm. Technical Properties Tensile Strength: (BS 2782 pt 10) - 8N/mm² Compressive Strength: (BS 6319 pt 2) - 36N/mm² Flexural Strength: 17.5N/mm² Chemical Resistance Resitech MD Screed exhibits excellent resistance to a wide range of chemicals, and is fully resistant to the following: 10% Sulphuric Acid 10% Hydrochloric Acid Xylene Methyl Ethyl Ketane Petrol 20% Sodium Hydroxide Ethylene Glycol Trichlorethylene Pot Life (20^oC) - 1 hour Primary Cure (20^oC) - 12 hours Full cure (chemical resistance)(20^oC) - 7 days Application Temperatures - 5 - 30^oC Please note that cure times and open to traffic times increase considerably at lower temperatures. Cleaning Tools should be cleaned with a hydrocarbon solvent before the initial cure has occurred. Health and safety It is recommended that barrier cream, gloves and overalls should be worn when using Resitech MD Screed. For full details please refer to the appropriate health and safety data sheet.

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