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BaseCAPS from SWT Group is an easy to apply, cost effective stain-blocking primer for white silicone topcoats, typically applied to asphaltic roofing materials. Specifically designed for the roofing industry, this water based acrylic primer is a ready-to-apply 1K product which prevents asphalt staining and yellowing. When used as a primer for silicone top coat applications, BaseCAPS matches the performance of industry leading 2K epoxy primers but at a lower cost and significantly easier application process as confirmed through Xenon-Arc testing.

Product Type: 1K (1 component) Coating, Primer, Waterborne Coating

Features: Cost Effective, Excellent Substrate Adhesion, Fast Drying, Flexible, Good Non-Yellowing Properties, Good Stability, Good Stain Resistance, High Performance, Low Viscosity

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Identification & Functionality

Features & Benefits

Product Highlights

With BaseCAPS, your roof can be ready for a silicone topcoat in as little as 2 hours after application, compared to a typical 24 hour downtime when using epoxy primers. Its superior flexibility provides protection against damage by snow, rain, hail and maintenance foot traffic.

  • 1K ready-to-spray formula
  • Promotes inter-coat adhesion for silicone topcoats
  • Superior stain blocking and bleed resistance

Applications & Uses

Technical Details & Test Data

Advantages Over Typical Epoxy Primers
  • One Component - no need for mixing two materials and no pot life issues.
  • Ease of Use - Stable, low viscosity product that applies quickly and easily
  • Adhesion – Superior adhesion to bituminous substrates,
  • Stain Resistance- Excellent stain blocking characteristics at lower film builds .
  • Faster Dry Time- BaseCAPS can be top coated 2 hours after application