PolyasparticDTM-LP

PolyasparticDTM-LP (PolyDTM-LP) is a long pot life version of PolyDTM, still on the leading edge of easy to use, rapid curing, direct to metal (DTM) polyaspartic coatings. It meets both current, and potential future, VOC requirements while retaining the desired fast return to service attributes that end users have come to expect from polyaspartic coatings.

Its long pot life removes the need to purchase plural component spraying equipment in order to utilise polyaspartics superior properties on your projects. 

PolyDTM-LP can be applied directly to properly prepared steel, aluminium, galvanized steel or concrete as well as to existing coatings such as epoxies and urethanes as recommended.
Even though PolyDTM-LP is designed to be DTM it’s even better over our Blast Saver Primer (BSP) which removes many prep question marks, is indefinitely re-coatable and enhances corrosion resistance. Removing any fear of corrosion taking hold before PolyDTM-LP can be applied.

Ten years ago, polyaspartic DTM coatings were considered a light to medium-duty solution for a particularly niche portion of protective coating applications. Now however, after over a decade of in-field use and advancements in formulations polyaspartics are a proven technology with demonstrated long-term performance. 

PolyasparticDTM-LP Key Features:

Preparation 

Steel

Ensure all rough welds, sharp edges and weld spatter are smoothed or removed. Remove any grease, oil and other contaminants in accordance with AS1627.1. Abrasive blast clean to a minimum of AS1627.4 Class 2.5. Remove all dust and loose contaminants post blasting by brushing or compressed air, and vacuum cleaning.
Where abrasive blast cleaning is not viable: Rust, mill scale, oxide deposits and delaminating paint films must be removed by power tool cleaning according to AS1627.2. If this is also not viable use Blast Saver Primer.
Blasted surfaces should be coated within 8 hours after blasting or before rusting or other contamination of the surface occurs. If this is not possible use Blast Saver Primer, PolyasparticDTM-LP can then be applied in any amount of time required once the primer is dry.
For best results and enhanced corrosion resistance always apply Blast Saver Primer followed by PolyasparticDTM-LP 2 coats at 150 micron WFT per coat. 

Concrete

Concrete should be at least 28 days old before coating. Remove all laitance, release agents, curing compounds, oil, grease, failing coatings, dust, dirt and other surface contaminants. Fill any large cracks or voids using Epoxy2U Polyurea Crack Repair or other suitable approved filler. The surface should be profiled via diamond grinding or shot blasting to ensure maximum adhesion. Moisture content of the slab should be below 5%, otherwise a moisture vapor barrier, such as Epoxy2U MVB15 should be applied prior to the PolyasparticDTM-LP coating. 

Existing Coatings

First, test adhesion of existing coating by standard cross hatch adhesion test. If the coating fails, it must be removed. If it passes, clean the surface to remove any chalking and dust. If the coating is not weathered and outside its recoat window you may need to mechanically abrade the surface to provide a key for the new coating. For best results use Blast Saver Primer on painted surfaces prior to PolyasparticDTM-LP.  

Coating performance is directly proportional to the comprehensiveness of surface preparation. 

Application

Application can be done utilising batch mixes and airless, HVLP, conventional, or air assisted airless. Thin up to 10% with acetone or xylene (if required) to aid atomisation. 
Typical conventional spray setup:
1.8mm tip @ 50-60 psi at the gun
Typical airless setup:
Tip from 0.38 - 0.43 mm @ 80-100 psi pump pressure
1:1 plural component sprayer such as Surface Engineering Equipment PSM11, Graco XP70, or similar capable of 80 - 140 psi at the spray tip are also suitable. Use the lowest pressure possible to achieve the desired finish. Work methodically and allow adequate overlap of each pass. Do not spray an area that will take over two hours to complete before you are able to return to the starting point and begin the next coat. This ensures the first layer is within its recoat window to achieve maximum inter-coat adhesion.

Contact an appropriate equipment manufacturer for a recommendation.
This product is designed to be applied by professional trained coating applicators familiar with the application of airless, plural spray, and multi-component products.
Thinning is not required. Heating is usually not required but can be utilised at the applicators discretion.

Note: where one coat is normally required; certain colors may require additional coats to achieve full depth of colour.