For roofing contractors seeking a high-performance silicone coating with a high solids content, low VOCs, and the ability to maintain a clean, reflective surface over time, Del-Val 321 High Solids Silicone Roof Coating from United Asphalt is an excellent choice. This one-part silicone elastomeric coating offers high yield and is formulated with low VOCs, making it a more environmentally conscious option. When compared mil for mil with similar silicone coatings, Del-Val 321 provides greater UV protection and offers increased resistance to moisture penetration, contributing to the long-term durability of the roof system. Its exceptional weatherability properties ensure excellent long-term protection against the elements.
Del-Val 321 boasts less dirt pickup than standard silicones, which means more sustained reflectivity and good looks for the coated roof surface over its lifespan. Once cured, this liquid applied silicone coating provides a durable, seamless, flexible, and waterproof membrane that effectively resists lateral movement and shear while allowing for normal expansion and contraction of the underlying substrate. It is specifically designed as a protective coating over a variety of roofing substrates, forming a robust and reliable barrier.
Proper preparation is crucial; the surface must be clean and free of all loose particles, dirt, debris, and other contaminants that could inhibit adhesion. Adhesion tests are recommended to ensure the coating will adhere properly to the specific substrate; contact United Asphalt if needed. Apply Del-Val 321 High Solids Silicone Roof Coating by medium nap rollers, soft brushes, or high pressure airless spray equipment. Apply only to clean, dry, sound surfaces free of loose particles or other foreign matter. For best results, ambient temperature should be between 50-90°F, and relative humidity should be above 20%. Higher temperatures will shorten the cure and working times (important for proper application of granules before the material has skinned), while lower temperatures and lower humidity will lengthen skinover, tack free, and ultimate cure times. Sudden temperature declines that may result in dew formation on surfaces can prevent adhesion development.
Apply Del-Val 321 at the rate of 1.5 gallons per square (100 sq ft). The minimum dry mil thickness shall be above 20 mils to achieve optimal performance. Two passes of silicone and a primer coat may be required for some applications, depending on the substrate and its condition. Important limitations and precautions include avoiding contamination in sealed containers, storing away from heat, sources of ignition, and incompatibles. Use only in well-ventilated areas; do not inhale vapor or mist or get on skin, in eyes, or on clothing. Refer to the SDS for more information. Choose Del-Val 321 High Solids Silicone Roof Coating from A1A Wholesale Supply for a high-performance, low VOC, and durable silicone solution for various roofing substrates nationwide.
- Product Name: Del-Val 321 High Solids Silicone Roof Coating
- Brand: United Asphalt
- Type: High Solids Silicone Roof Coating, One-Part Silicone Elastomeric Coating, Protective Roof Coating, Waterproof Membrane, Reflective Roof Coating
- Composition: One-part silicone elastomeric coating (High Solids)
- Key Properties: High Solids, High Yield, Low VOC, Durable, Seamless, Flexible, Waterproof, Weather Resistant, Resists Lateral Movement/Shear, Allows Expansion/Contraction, Superior UV Protection (mil for mil), Increased Moisture Resistance, Excellent Weatherability, Less Dirt Pickup, Sustained Reflectivity, Good Looks.
- Uses/Compatible Substrates: Protective coating over a variety of roofing substrates. (Includes single-ply, mod-bit, metal, SPF, etc., based on typical silicone compatibility, though not explicitly listed as for 320).
- Preparation: Clean, dry, sound surface, free of contaminants/loose particles; adhesion tests recommended.
- Application: Medium nap rollers, soft brushes, high pressure airless spray equipment; apply only to clean, dry, sound surfaces; optimal ambient temp 50-90°F, optimal RH > 20%; apply at 1.5 gal/square (100 sq ft); minimum >20 mils DFT; 2 passes/primer may be needed for some applications; apply granules before skinning; affects of temp/humidity on cure noted.
- Coverage: 1.5 gallons per square (100 sq ft).
- Minimum Recommended DFT: Above 20 mils.
- Limitations/Precautions: Avoid contamination in containers; store away from heat/ignition/incompatibles; well ventilated areas; do not inhale vapor/mist or get on skin/eyes/clothing; refer to SDS; avoid temp < 50°F or > 90°F, RH < 20%, sudden temp declines causing dew.
- VOC: Low VOC.
- Function: Provides a durable, seamless, flexible, waterproof, UV-resistant, weatherable, low VOC silicone membrane with less dirt pickup for sustained reflectivity over a variety of roofing substrates.
