RainShield-U | Water Catalyzed Urethane System

The Rain Shield-U is a high-performance, water-activated (water-catalyzed) polyurethane waterproofing system ideal for heavy pedestrian traffic over plywood and concrete substrates.

Yes! The RainShield-U System is  high solids, waterproof, joint-free, liquid

applied and seamless system for concrete, wood and metal surfaces.

This is a quick guide on the RainShield-U System. For a full guide please refer to the System Specification Guide and/or contact our Technical Support at (562) 944-6391 during normal business hours. 

Primer

The LDU6875 primer is a two-part mixture. Side-A and Side-B should be thoroughly mixed individually prior to combining to ensure a homogeneous material. The volume mixing ratio is 2 parts of Side A to 1 part Side B liquid (2A:1B). The combined components should be thoroughly mixed using a mechanical mixer at slow speed or for at least 5 minutes if by hand. The LDU6875 should be applied at the rate of 300 square feet per gallon. Coverage rate will depend on surface roughness and porosity. It can be applied using an airless sprayer, brush, or phenolic-resin-core roller. Allow LDU6875 to become thumbprint-tack free before applying the coating. Approximate tack free time is 8 hours at 75°F and 50% relative humidity.

Base Coat

It is best to apply the LDU6800 using a notched trowel or squeegee. If a roller, or airless sprayer, is used, take caution not to entrap any air into the coating. When using a roller, use a phenolic-resin-core roller. Apply LDU6800 at a rate of 3 Gallons per 100 square feet. Mix 1 quart of water per gallon of LDU6800 to catalyze. Mix thoroughly until water is completely combined. Apply in one continuous application to ensure a smooth, level coat, with no lines or streaks. Broadcast silica sand when LDU6800 surface has become sticky and firm. Use kiln dry, washed, rounded silica for broadcasting. Broadcast silica sand to complete coverage, or refusal. Allow to cure for a minimum of 2-4 hours before application of next step.

Seal Coat (LDU6851 Single-Component Urethane)

Before application, mix LDU6851 using a mechanical mixer (Jiffy Mixer) at slow speeds until a homogeneous mixture and color is attained. LDU6851 may also be mixed by hand for at least five minutes. Apply LDU6851 evenly over the entire deck. For best results, an airless sprayer or phenolic-resin-core roller may be used but extra care should be taken not to cause air bubbles. LDU6851 may require more than one coat depending on the job specifications and requirements. 

*Optional Fast Cure Seal Coat (LDU6852 Two-Component Hybrid Urethane)

Before application, pre-mix Side A of LDU6852 using a mechanical mixer at slow speed and add Side-B of LDU6852, (10 parts of Side A to 1 part of Side B by volume for smaller batches to a ratio machine or hand mixed material) and continue mixing until a homogeneous mixture and color is obtained. Use caution not to whip air into the material as this may result in pinhole blisters and/or shortened pot life. Apply mixture of LDU6852 over the entire surface. Apply by notched squeegee or notched trowel over the entire deck. Requires a continuous coating application to minimize line and or streaking.

Note: Please refer to individual product technical sheets for more detailed product information on all products within this specification.

Uncured material can be removed with acetone. Cured material can only be removed mechanically. Floors should be inspected during use for inconsequential damage and wear. Damage areas should be remediated as soon as possible to prevent further damage to the area(s). To repair, remove any loose coating and refer to this specification; repeat process in affected area.

Limitations

▪ Temperature/Weather: Do not install if the temperature is below 55 degrees.

▪ Water will ruin uncured products. If inclement weather threatens, cover area to protect new application.

▪ Do not allow any product to FREEZE while in container.

Health, Protection and Safety

Refer to individual product container labels, individual product technical data sheets, and SDS for health, protection, and safety precautions.