How To Spray A Bedliner

 

What is Polyurea?

Today we are going to provide a comprehensive overview of Polyurea, including definitions and terms in layman's terms for engineers, architects, and contractors. This is a useful resource for those who want to get basic education as well as the right information for sales and specifications.

Polyurea

Polyurea is a chemical reaction between an amine and an isocyanate. This is a reaction between an MDI/HDI pre-polymer and amine-terminated materials. This is the PDA's formally excluded definition. As long as correct stoichiometric calculations are used, the PDA allows pigment dispersions to be used in polyols. These are often used as colorants. These amines generally consist of polyetheramines such as Jeffamine(r), D2000, and a primary amino chain-extender such as Ethacure(r), 100. This is used to increase hard block content and set the formulation at a 1:1 volume ratio. Aspartic esters can be added to polyurea coatings, which provide amine functionality. A polyurea is a chemical backbone that contains amine linkages. Polyurea is used in industrial coatings for severe environments that are chemically resistant to hydrocarbons, hydrogen sulfide gas, and immersed sewage.

Polyurethane

Polyurethane is a chemical reaction of an isocyanate with a polyol. To complete the reaction, polyurethane must be used as a catalyst. A pigment that is dispersed in a plastic can be used as a colorant, just like with polyureas. These formulations require different volume ratios and ambient temperatures. These formulations are usually free of amines in their polymer backbone. All functionality is hydroxyl (i.e. It contains alcohols. Polyurethanes can be used to make foams and casting materials. They are durable and relatively affordable.

Polyurea/Polyurethane Hybrid

Polyurea/Polyurethane mixtures are the result of chemical reactions between an isocyanate, a mixture of polyol and amine reactants. These hybrid formulations are generally a 'intermediate polyurea' that exhibits many of the same properties as a polyurea. Hybrid formulations can have some of the same problems as polyurethane chemistry. Hybrids are generally composed of a polyether/polyester polyol, a primary amino, and a polyether/polyester polyol. This creates a chemical backbone that includes amine functionality and hydroxyl functionality. Polyurea/polyurethane-polyurethane combinations are typically used on non-critical items, which generally don't require extreme temperatures or immersion. These applications include balcony deck coatings and truck bed linings that are sprayed in.

STEP BY STEP GUIDE: SPRAYING A BEDLINER

** WARNING! Only mix the amount that you can use within 15 minutes. Use small amounts until you are satisfied *Please be familiar with polyurea in order to avoid premature curing.

Step 1: Remove the tailgate from your vehicle and place it on a rack. Take out any tie-downs or plugs. When removing the tailgate access panel, be sure to protect the latch and rods.

Step 2: Take out the bolts and hardware from the truck bed. Bolt heads don't build well Thickness and failure points are often a common theme.

Step 3: Clean your truck bed and tailgate. Use acetone to clean the truck bed and tailgate. Apply Denatured alcohol should be applied to the areas to be taped.

Step 4: Protect non-linear areas by masking the truck and tailgate from spray. To avoid bleeding, use high-quality masking paper or a plastic cover for your truck. 

Step 5: Use ArmorThane primer to be sure you have a solid foundation. Only Scuff or Sand in bad areas. These areas can be scrubbed with a cup brush and a 5-in. Dual-action and 5-in. Palm sander using 80-grit sandpaper Use our Use any 1:1 high-quality, auto-grade epoxy primer for those areas only. There should not be any glossy areas. Similar to above, if there is rust present, you can use a coarse grinding disc of 24-40 grit to grind it down to the bare steel. Before spraying, prime all areas of bare metal.

Step 6: Final cleaning. You can remove dust and grit by vacuuming or wiping with acetone.

Step 7: Apply the liner according to ArmorThane instructions. SEE (INSTRUCTION-LINK) The exact thickness of the liner Quality is controlled; more is better.

Step 8: Examine the bed. To ensure consistency in texture, use a flashlight or bright light. High-stress areas include the tailgate, rear of bed, and fender wells. Spray thickets in these areas. To determine the depth of spraying across the truck bed, use a thickness gauge. A minimum of 63 millimeters is sufficient, while 125 mils is a high quality height.

Step 9: Take off the tape. After the spray has gelled, pull the tape up towards the truck bed. To create a smooth transition between the liner and the painted surface, pull the tape at 45 degrees towards the truck bed. Do not lift the edges of the newly sprayed liner.

Step 10: Make sure that any masking tape, tarp or paper is removed. Uncured sprays can be wiped clean With lacquer thinner.

Step 11: Trim any drips along rail edges.

Step 12: Install the hardware that was removed from the bed and tailgate. Reinstall tailgate.

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